GMC Sierra 2500 Headroom (2002 - 2024): Your Comprehensive Guide

Researched By The AutoPadre Research Team

Last Updated 2024-01-29

The GMC Sierra 2500 headroom in the first row is a minimum of 41 inches and a maximum of 43.11 inches.

The GMC Sierra 2500 has a minimum of 38.4 inches and a maximum of 40.6 inches of headroom in the second row.

Check out the Headroom specifications for other makes and models.

2024 GMC Sierra 2500 Headroom

In the first row, the 2024 GMC Sierra 2500 headroom is between 43.03 inches and 43.11 inches.

2024 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Denali Ultimate Crew Cab 172" Diesel	6.6L \| Turbo \| V8 \| DURAMAX, B20- COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD Denali Ultimate Crew Cab 159" Diesel	6.6L \| Turbo \| V8 \| DURAMAX, B20- COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD Denali Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD Denali Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD AT4X Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD AT4 Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.

2024 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD AT4 Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	40.12 in.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	40.12 in.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.11 in.

2024 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	39.88 in.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	39.88 in.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.11 in.
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	39.88 in.

2024 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	39.88 in.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	40.12 in.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	40.12 in.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.11 in.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	39.88 in.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	39.88 in.

2024 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	43.03 in.	40.12 in.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.11 in.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	39.88 in.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	39.88 in.
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	40.12 in.

2024 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	43.03 in.	40.12 in.

2024 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Denali Ultimate Crew Cab 172" Diesel	6.6L \| Turbo \| V8 \| DURAMAX, B20- COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD Denali Ultimate Crew Cab 159" Diesel	6.6L \| Turbo \| V8 \| DURAMAX, B20- COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD Denali Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD Denali Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD AT4X Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD AT4 Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.

2024 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD AT4 Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	102 cm.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	102 cm.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.

2024 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	101 cm.

2024 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	101 cm.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	102 cm.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	102 cm.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.

2024 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| 4WD	109 cm.	102 cm.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	101 cm.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	101 cm.
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	102 cm.

2024 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| Allison 10 Spd Auto \| RWD	109 cm.	102 cm.

2023 GMC Sierra 2500 Headroom

In the first row, the 2023 GMC Sierra 2500 headroom is 43 inches.

The second row headroom of the 2023 GMC Sierra 2500 is 40 inches.

2023 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Denali Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Denali Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD AT4 Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD AT4 Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD SLT Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.

2023 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD SLT Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.

2023 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.

2023 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.

2023 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.

2023 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.

2023 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Denali Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Denali Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD AT4 Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD AT4 Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD SLT Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.

2023 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD SLT Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.

2023 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.

2023 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.

2023 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.

2023 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.

2022 GMC Sierra 2500 Headroom

In the first row, the 2022 GMC Sierra 2500 headroom is 43 inches.

The second row headroom of the 2022 GMC Sierra 2500 is 40 inches.

2022 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Denali Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Denali Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD AT4 Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD AT4 Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.

2022 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD SLT Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.

2022 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.

2022 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.

2022 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.

2022 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.

2022 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Denali Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Denali Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD AT4 Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD AT4 Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.

2022 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLT Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD SLT Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD SLT Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD SLT Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.

2022 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD SLE Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.
HD SLE Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.

2022 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD SLE Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD SLE Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD SLE Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.

2022 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Pro Reg Cab 142" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.
HD Pro Double Cab 162" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD Pro Double Cab 149" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD Pro Crew Cab 172" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.

2022 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Pro Crew Cab 159" Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.

2021 GMC Sierra 2500 Headroom

In the first row, the 2021 GMC Sierra 2500 headroom is 43 inches.

2021 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom
HD Regular Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.
HD Regular Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.
HD Regular Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.
HD Regular Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.
HD Regular Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.
HD Regular Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.

2021 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Regular Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.
HD Regular Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.
HD Extended Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	39 in.
HD Extended Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD Extended Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.	39 in.
HD Extended Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.

2021 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Extended Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	39 in.
HD Extended Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.
HD Extended Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.	39 in.
HD Extended Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD Extended Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	39 in.
HD Extended Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39 in.

2021 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Extended Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.	39 in.
HD Extended Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39 in.
HD Crew Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	40 in.
HD Crew Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Crew Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.	40 in.
HD Crew Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.

2021 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Crew Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	40 in.
HD Crew Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Crew Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.	40 in.
HD Crew Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.
HD Crew Cab Denali Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	40 in.
HD Crew Cab Denali Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.

2021 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Crew Cab AT4 Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	40 in.
HD Crew Cab AT4 Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Crew Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	43 in.	40 in.
HD Crew Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	40 in.
HD Crew Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	43 in.	40 in.
HD Crew Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	40 in.

2021 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom
HD Regular Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.
HD Regular Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.
HD Regular Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.
HD Regular Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.
HD Regular Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.
HD Regular Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.

2021 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Regular Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.
HD Regular Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.
HD Extended Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	99 cm.
HD Extended Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD Extended Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.	99 cm.
HD Extended Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.

2021 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Extended Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	99 cm.
HD Extended Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.
HD Extended Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.	99 cm.
HD Extended Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD Extended Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	99 cm.
HD Extended Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	99 cm.

2021 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Extended Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.	99 cm.
HD Extended Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	99 cm.
HD Crew Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD Crew Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Crew Cab SLT Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.	101 cm.
HD Crew Cab SLT Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.

2021 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Crew Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD Crew Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Crew Cab SLE Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.	101 cm.
HD Crew Cab SLE Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.
HD Crew Cab Denali Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD Crew Cab Denali Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.

2021 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Crew Cab AT4 Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD Crew Cab AT4 Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Crew Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| 4WD	109 cm.	101 cm.
HD Crew Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109 cm.	101 cm.
HD Crew Cab Diesel	6.6L \| Turbo \| V8 \| DURAMAX B20-DIESEL COMPATIBLE \| Allison 10 Spd Auto \| RWD	109 cm.	101 cm.
HD Crew Cab Diesel	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109 cm.	101 cm.

2020 GMC Sierra 2500 Headroom

In the first row, the 2020 GMC Sierra 2500 headroom is between 43 inches and 43.1 inches.

2020 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43.1 in.
HD 2500 Regular Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43.1 in.
HD 2500 Regular Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43.1 in.
HD 2500 Regular Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43.1 in.
HD 2500 Extended Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Extended Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Extended Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Extended Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Extended Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Crew Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Crew Cab Denali	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab AT4	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Double Cab 162" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Double Cab 149" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab 172" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab 159" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Double Cab 162" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Double Cab 149" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 172" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Crew Cab 159" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Reg Cab 142" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43.1 in.
HD 2500 Double Cab 162" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Double Cab 149" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab 172" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 159" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Reg Cab 142" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43.1 in.
HD 2500 Double Cab 162" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Double Cab 149" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Crew Cab 172" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Crew Cab 159" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 172" Denali	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab 159" Denali	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Reg Cab 142"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43.1 in.
HD 2500 Double Cab 162"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Double Cab 149"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab 172"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 159"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Reg Cab 142"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43.1 in.
HD 2500 Double Cab 162"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Double Cab 149"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Crew Cab 172"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.
HD 2500 Crew Cab 159"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 172" AT4	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.
HD 2500 Crew Cab 159" AT4	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	43 in.	39.9 in.

2020 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.5 cm.
HD 2500 Regular Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.5 cm.
HD 2500 Regular Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.5 cm.
HD 2500 Regular Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.5 cm.
HD 2500 Extended Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Extended Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Extended Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Extended Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Extended Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab Denali	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab AT4	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Double Cab 162" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Double Cab 149" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 172" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 159" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Double Cab 162" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Double Cab 149" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 172" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 159" SLT	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Reg Cab 142" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.5 cm.
HD 2500 Double Cab 162" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Double Cab 149" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 172" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 159" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Reg Cab 142" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.5 cm.
HD 2500 Double Cab 162" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Double Cab 149" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 172" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 159" SLE	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 172" Denali	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 159" Denali	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Reg Cab 142"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.5 cm.
HD 2500 Double Cab 162"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Double Cab 149"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 172"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 159"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Reg Cab 142"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.5 cm.
HD 2500 Double Cab 162"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Double Cab 149"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 172"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 159"	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| RWD	109.2 cm.	101.3 cm.

2020 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 172" AT4	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.
HD 2500 Crew Cab 159" AT4	6.6L \| V8 \| 6 Spd Auto, Heavy-Duty \| 4WD	109.2 cm.	101.3 cm.

2019 GMC Sierra 2500 Headroom

In the first row, the 2019 GMC Sierra 2500 headroom is 42.8 inches.

2019 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.

2019 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.

2019 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab 167.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab 153.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab 167.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab 153.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Double Cab 158.1" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.

2019 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Double Cab 144.2" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Crew Cab 167.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab 153.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Double Cab 158.1" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Crew Cab 167.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab 153.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2019 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 153.7" Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab 153.7" Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Reg Cab 133.6"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Double Cab 158.1"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Double Cab 144.2"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Crew Cab 167.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.

2019 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 153.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Double Cab 158.1"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Crew Cab 167.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab 153.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2019 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.

2019 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.

2019 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 167.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 153.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 167.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 153.7" SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Double Cab 158.1" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.

2019 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Double Cab 144.2" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab 167.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 153.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Double Cab 158.1" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab 167.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 153.7" SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2019 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 153.7" Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 153.7" Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Reg Cab 133.6"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Double Cab 158.1"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Double Cab 144.2"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab 167.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.

2019 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab 153.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Double Cab 158.1"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab 167.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab 153.7"	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2018 GMC Sierra 2500 Headroom

In the first row, the 2018 GMC Sierra 2500 headroom is 42.8 inches.

2018 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.

2018 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2018 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2018 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.

2018 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2018 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2017 GMC Sierra 2500 Headroom

In the first row, the 2017 GMC Sierra 2500 headroom is 42.8 inches.

2017 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.

2017 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2017 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2017 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.

2017 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2017 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2016 GMC Sierra 2500 Headroom

In the first row, the 2016 GMC Sierra 2500 headroom is 42.8 inches.

2016 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.

2016 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2016 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2016 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.

2016 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2016 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2015 GMC Sierra 2500 Headroom

In the first row, the 2015 GMC Sierra 2500 headroom is 42.8 inches.

2015 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.
HD 2500 Extended Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.

2015 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	38.7 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	38.7 in.
HD 2500 Crew Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2015 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	42.8 in.	40.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	42.8 in.	40.5 in.

2015 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.
HD 2500 Extended Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.

2015 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	98.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	98.3 cm.
HD 2500 Crew Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Work Truck	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2015 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	108.7 cm.	102.9 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	108.7 cm.	102.9 cm.

2014 GMC Sierra 2500 Headroom

In the first row, the 2014 GMC Sierra 2500 headroom is 41.3 inches.

2014 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2014 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2014 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2014 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2013 GMC Sierra 2500 Headroom

In the first row, the 2013 GMC Sierra 2500 headroom is between 41.1 inches and 41.3 inches.

2013 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.1 in.	39.5 in.

2013 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.1 in.	39.5 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.1 in.	39.5 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2013 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.4 cm.	100.3 cm.

2013 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.4 cm.	100.3 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.4 cm.	100.3 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2012 GMC Sierra 2500 Headroom

In the first row, the 2012 GMC Sierra 2500 headroom is between 41.1 inches and 41.3 inches.

2012 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.1 in.	39.5 in.

2012 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2012 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.4 cm.	100.3 cm.

2012 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI E85-COMPATIBLE FLEXFUEL \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2011 GMC Sierra 2500 Headroom

In the first row, the 2011 GMC Sierra 2500 headroom is between 41.1 inches and 41.3 inches.

2011 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.1 in.	39.5 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.1 in.	39.5 in.

2011 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2011 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.4 cm.	100.3 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.4 cm.	100.3 cm.

2011 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab Denali	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2010 GMC Sierra 2500 Headroom

In the first row, the 2010 GMC Sierra 2500 headroom is between 41.3 inches and 41.4 inches.

2010 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.4 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.4 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.

2010 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2010 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	105.2 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	105.2 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.

2010 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2009 GMC Sierra 2500 Headroom

In the first row, the 2009 GMC Sierra 2500 headroom is between 41.3 inches and 41.4 inches.

2009 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.4 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.4 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.

2009 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2009 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	105.2 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	105.2 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.

2009 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2008 GMC Sierra 2500 Headroom

In the first row, the 2008 GMC Sierra 2500 headroom is between 41.3 inches and 41.4 inches.

2008 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.6L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.4 in.
HD 2500 Regular Cab SLE	6.6L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.4 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.

2008 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2008 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.6L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	105.2 cm.
HD 2500 Regular Cab SLE	6.6L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	105.2 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.

2008 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2007 GMC Sierra 2500 Headroom

In the first row, the 2007 GMC Sierra 2500 headroom is between 41 inches and 41.4 inches.

2007 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Classic 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| 4WD	41 in.
HD Classic 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| RWD	41 in.
HD Classic 2500 Regular Cab SL	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| 4WD	41 in.
HD Classic 2500 Regular Cab SL	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| RWD	41 in.
HD Classic 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	41 in.	38.4 in.
HD Classic 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	41 in.	38.4 in.

2007 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Classic 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	41 in.	38.4 in.
HD Classic 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	41 in.	38.4 in.
HD Classic 2500 Extended Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	41 in.	38.4 in.
HD Classic 2500 Extended Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	41 in.	38.4 in.
HD Classic 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	41 in.	39 in.
HD Classic 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	41 in.	39 in.

2007 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Classic 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	41 in.	39 in.
HD Classic 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	41 in.	39 in.
HD Classic 2500 Crew Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	41 in.	39 in.
HD Classic 2500 Crew Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	41 in.	39 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.4 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.4 in.

2007 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	39.3 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	39.3 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2007 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41.3 in.	40.6 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41.3 in.	40.6 in.

2007 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Classic 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| 4WD	104.1 cm.
HD Classic 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| RWD	104.1 cm.
HD Classic 2500 Regular Cab SL	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| 4WD	104.1 cm.
HD Classic 2500 Regular Cab SL	6.0L \| V8 \| VORTEC SFI \| 5 Spd Manual With OD \| RWD	104.1 cm.
HD Classic 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	104.1 cm.	97.5 cm.
HD Classic 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	104.1 cm.	97.5 cm.

2007 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Classic 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	104.1 cm.	97.5 cm.
HD Classic 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	104.1 cm.	97.5 cm.
HD Classic 2500 Extended Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	104.1 cm.	97.5 cm.
HD Classic 2500 Extended Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	104.1 cm.	97.5 cm.
HD Classic 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	104.1 cm.	99.1 cm.
HD Classic 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	104.1 cm.	99.1 cm.

2007 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD Classic 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	104.1 cm.	99.1 cm.
HD Classic 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	104.1 cm.	99.1 cm.
HD Classic 2500 Crew Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| 4WD	104.1 cm.	99.1 cm.
HD Classic 2500 Crew Cab SL	6.0L \| V8 \| VORTEC SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD And Tow/Haul Mode. \| RWD	104.1 cm.	99.1 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	105.2 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	105.2 cm.

2007 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	99.8 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	99.8 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2007 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.9 cm.	103.1 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| VORTEC VARIABLE VALVE TIMING SFI \| 6 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.9 cm.	103.1 cm.

2006 GMC Sierra 2500 Headroom

In the first row, the 2006 GMC Sierra 2500 headroom is 41 inches.

2006 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	41 in.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	41 in.
HD 2500 Regular Cab SL	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	41 in.
HD 2500 Regular Cab SL	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	41 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.

2006 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.
HD 2500 Extended Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39 in.

2006 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39 in.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39 in.
HD 2500 Crew Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39 in.
HD 2500 Crew Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39 in.

2006 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	104.1 cm.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	104.1 cm.
HD 2500 Regular Cab SL	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	104.1 cm.
HD 2500 Regular Cab SL	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	104.1 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.

2006 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	99.1 cm.

2006 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab SL	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	99.1 cm.

2005 GMC Sierra 2500 Headroom

In the first row, the 2005 GMC Sierra 2500 headroom is 41 inches.

2005 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	41 in.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	41 in.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	41 in.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	41 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.

2005 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39 in.

2005 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39 in.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39 in.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39 in.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39 in.

2005 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	104.1 cm.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	104.1 cm.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| 4WD	104.1 cm.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual With OD \| RWD	104.1 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.

2005 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	99.1 cm.

2005 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	99.1 cm.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	99.1 cm.

2004 GMC Sierra 2500 Headroom

In the first row, the 2004 GMC Sierra 2500 headroom is between 41 inches and 41.1 inches.

2004 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| 4WD	41 in.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	41 in.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| 4WD	41 in.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	41 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.

2004 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39.9 in.

2004 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39.9 in.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	39.9 in.
Crew Cab 2500 SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| 4WD	41.1 in.	39.9 in.
Crew Cab 2500 SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| RWD	41.1 in.	39.9 in.

2004 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
Crew Cab 2500 SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| 4WD	41.1 in.	39.9 in.
Crew Cab 2500 SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| RWD	41.1 in.	39.9 in.
2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	41 in.
2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	41 in.
2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.
2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	41 in.	38.4 in.

2004 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	41 in.	38.4 in.

2004 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| 4WD	104.1 cm.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	104.1 cm.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| 4WD	104.1 cm.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	104.1 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.

2004 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	101.3 cm.

2004 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	101.3 cm.
Crew Cab 2500 SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| 4WD	104.4 cm.	101.3 cm.
Crew Cab 2500 SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| RWD	104.4 cm.	101.3 cm.

2004 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
Crew Cab 2500 SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| 4WD	104.4 cm.	101.3 cm.
Crew Cab 2500 SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode And (Knp) Cooling, External Oil Cooler \| RWD	104.4 cm.	101.3 cm.
2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	104.1 cm.
2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, With OD \| RWD	104.1 cm.
2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.
2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| 4WD	104.1 cm.	97.5 cm.

2004 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled With OD, Tow/Haul Mode \| RWD	104.1 cm.	97.5 cm.

2003 GMC Sierra 2500 Headroom

In the first row, the 2003 GMC Sierra 2500 headroom is 41 inches.

2003 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| 4WD	41 in.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	41 in.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| 4WD	41 in.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	41 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41 in.	38.4 in.

2003 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41 in.	38.4 in.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41 in.	38.4 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41 in.	39.9 in.

2003 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41 in.	39.9 in.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	41 in.	39.9 in.
2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	41 in.
2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	41 in.

2003 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	38.4 in.
2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	38.4 in.
2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	41 in.	38.4 in.

2003 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| 4WD	104.1 cm.
HD 2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	104.1 cm.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| 4WD	104.1 cm.
HD 2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	104.1 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.1 cm.	97.5 cm.

2003 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.1 cm.	97.5 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.1 cm.	101.3 cm.

2003 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| RWD	104.1 cm.	101.3 cm.
2500 Regular Cab SLE	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	104.1 cm.
2500 Regular Cab	V8 \| VORTEC 6000 SFI \| 5 Spd Manual, W/OD \| RWD	104.1 cm.

2003 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
2500 Extended Cab SLT	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	97.5 cm.
2500 Extended Cab SLE	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	97.5 cm.
2500 Extended Cab	V8 \| VORTEC 6000 SFI \| 4 Spd Auto, Heavy-Duty, Electronically Controlled \| 4WD	104.1 cm.	97.5 cm.

2002 GMC Sierra 2500 Headroom

In the first row, the 2002 GMC Sierra 2500 headroom is 41 inches.

2002 GMC Sierra 2500 Headroom (Imperial)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| 4WD	41 in.
HD 2500 Regular Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	41 in.
HD 2500 Regular Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| 4WD	41 in.
HD 2500 Regular Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	41 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	41 in.	38.4 in.

2002 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	41 in.	38.4 in.
HD 2500 Extended Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	38.4 in.
HD 2500 Extended Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	41 in.	38.4 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	41 in.	39.9 in.

2002 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	41 in.	39.9 in.
HD 2500 Crew Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	39.9 in.
HD 2500 Crew Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	41 in.	39.9 in.
2500 Regular Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	41 in.
2500 Regular Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	41 in.

2002 GMC Sierra 2500 Headroom (Imperial) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
2500 Extended Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	38.4 in.
2500 Extended Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	38.4 in.
2500 Extended Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	41 in.	38.4 in.

2002 GMC Sierra 2500 Headroom (Metric)
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Regular Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| 4WD	104.1 cm.
HD 2500 Regular Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	104.1 cm.
HD 2500 Regular Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| 4WD	104.1 cm.
HD 2500 Regular Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	104.1 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	104.1 cm.	97.5 cm.

2002 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Extended Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	97.5 cm.
HD 2500 Extended Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	104.1 cm.	97.5 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	104.1 cm.	101.3 cm.

2002 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
HD 2500 Crew Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	101.3 cm.
HD 2500 Crew Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| RWD	104.1 cm.	101.3 cm.
2500 Regular Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	104.1 cm.
2500 Regular Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 5 Spd Manual W/Deep Low, Od \| RWD	104.1 cm.

2002 GMC Sierra 2500 Headroom (Metric) Continued
Trim	Engine \| Transmission \| Drivetrain	Front Row Headroom	Second Row Headroom
2500 Extended Cab SLT	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	97.5 cm.
2500 Extended Cab SLE	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	97.5 cm.
2500 Extended Cab SL	6.0L \| V8 \| (364) SFI (VORTEC) \| 4 Spd Auto w/OD \| 4WD	104.1 cm.	97.5 cm.