Specifications Comparison: 2021 Dodge Ram 1500 vs 2024 GMC Sierra 1500

Headroom

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
Pickup Crew Cab Bighorn/Lone Star	3.6L V6	RWD	40	39
Pickup Crew Cab Bighorn/Lone Star	5.7L V8	RWD	40	39
Pickup Crew Cab Bighorn/Lone Star	5.7L V8	RWD	40	39
Pickup Crew Cab Bighorn/Lone Star	5.7L V6	RWD	40	39
Pickup Crew Cab TRX	6.2L V8	4WD	40	39
Pickup Quad Cab HFE	3.6L V6	RWD	40	39
Pickup Quad Cab Tradesman	3.6L V6	RWD	40	39
Pickup Quad Cab Tradesman	5.7L V8	RWD	40	39
Pickup Quad Cab Tradesman	5.7L V8	RWD	40	39
Pickup Quad Cab Tradesman	5.7L V6	RWD	40	39
Pickup Quad Cab Tradesman	3.6L V6	4WD	40	39
Pickup Quad Cab Tradesman	5.7L V8	4WD	40	39
Pickup Quad Cab Tradesman	5.7L V8	4WD	40	39
Pickup Quad Cab Tradesman	3.0L V6	4WD	40	39
Classic Crew Cab SLT	5.7L V8		41	39
Classic Crew Cab Warlock	3.6L V6	RWD	41	39
Classic Crew Cab Warlock	5.7L V8	RWD	41	39
Classic Regular Cab SLT	3.6L V6		39
Classic Regular Cab SLT	V8		39
Classic Regular Cab SLT	3.6L V6		39
Classic Regular Cab SLT	V8		39
Classic Regular Cab Tradesman	3.6L V6	RWD	39
Classic Regular Cab Tradesman	5.7L V8	RWD	39
Classic Regular Cab Tradesman	3.6L V6	4WD	39
Classic Regular Cab Tradesman	5.7L V8	4WD	39

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
Denali Crew Cab 147"	5.3L V8	RWD	43.03	40.12
Denali Crew Cab 147"	5.3L V8	4WD	43.03	40.12
Denali Crew Cab 157"	5.3L V8	4WD	43.03	40.12
Elevation Crew Cab 147"		RWD	43.03	40.12
Elevation Double Cab 147"		RWD	43.03	39.88
Elevation Crew Cab 147" w/3SB		4WD	43.03	40.12
Elevation Crew Cab 147" w/3VL		4WD	43.03	40.12
Elevation Crew Cab 157"		4WD	43.03	40.12
Elevation Double Cab 147" w/3SB		4WD	43.03	39.88
Elevation Double Cab 147" w/3VL		4WD	43.03	39.88
Pro Crew Cab 147"		RWD	43.03	40.12
Pro Double Cab 147"		RWD	43.03	39.88
Pro Reg Cab 126"		RWD	43.11
Pro Reg Cab 140"		RWD	43.11
Pro Crew Cab 147"		4WD	43.03	40.12
Pro Crew Cab 157"		4WD	43.03	40.12
Pro Double Cab 147"		4WD	43.03	39.88
Pro Reg Cab 126"		4WD	43.11
Pro Reg Cab 140"		4WD	43.11
SLE Crew Cab 147"		RWD	43.03	40.12
SLE Double Cab 147"		RWD	43.03	39.88
SLE Crew Cab 147"		4WD	43.03	40.12
SLE Crew Cab 157"		4WD	43.03	40.12
SLE Double Cab 147"		4WD	43.03	39.88
SLT Crew Cab 147"	5.3L V8	RWD	43.03	40.12
SLT Crew Cab 147"	5.3L V8	4WD	43.03	40.12
SLT Crew Cab 157"	5.3L V8	4WD	43.03	40.12
AT4 Crew Cab 147"	3.0L I6	4WD	43.03	40.12
AT4 Crew Cab 157"	3.0L I6	4WD	43.03	40.12
AT4X Crew Cab 147"	3.0L I6	4WD	43.03	40.12
Denali Ultimate Crew Cab 147"	6.2L V8	4WD	43.03	40.12

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
Pickup Crew Cab Bighorn/Lone Star	3.6L V6	RWD	101	99
Pickup Crew Cab Bighorn/Lone Star	5.7L V8	RWD	101	99
Pickup Crew Cab Bighorn/Lone Star	5.7L V8	RWD	101	99
Pickup Crew Cab Bighorn/Lone Star	5.7L V6	RWD	101	99
Pickup Crew Cab TRX	6.2L V8	4WD	101	99
Pickup Quad Cab HFE	3.6L V6	RWD	101	99
Pickup Quad Cab Tradesman	3.6L V6	RWD	101	99
Pickup Quad Cab Tradesman	5.7L V8	RWD	101	99
Pickup Quad Cab Tradesman	5.7L V8	RWD	101	99
Pickup Quad Cab Tradesman	5.7L V6	RWD	101	99
Pickup Quad Cab Tradesman	3.6L V6	4WD	101	99
Pickup Quad Cab Tradesman	5.7L V8	4WD	101	99
Pickup Quad Cab Tradesman	5.7L V8	4WD	101	99
Pickup Quad Cab Tradesman	3.0L V6	4WD	101	99
Classic Crew Cab SLT	5.7L V8		104	99
Classic Crew Cab Warlock	3.6L V6	RWD	104	99
Classic Crew Cab Warlock	5.7L V8	RWD	104	99
Classic Regular Cab SLT	3.6L V6		99
Classic Regular Cab SLT	V8		99
Classic Regular Cab SLT	3.6L V6		99
Classic Regular Cab SLT	V8		99
Classic Regular Cab Tradesman	3.6L V6	RWD	99
Classic Regular Cab Tradesman	5.7L V8	RWD	99
Classic Regular Cab Tradesman	3.6L V6	4WD	99
Classic Regular Cab Tradesman	5.7L V8	4WD	99

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
Denali Crew Cab 147"	5.3L V8	RWD	109	102
Denali Crew Cab 147"	5.3L V8	4WD	109	102
Denali Crew Cab 157"	5.3L V8	4WD	109	102
Elevation Crew Cab 147"		RWD	109	102
Elevation Double Cab 147"		RWD	109	101
Elevation Crew Cab 147" w/3SB		4WD	109	102
Elevation Crew Cab 147" w/3VL		4WD	109	102
Elevation Crew Cab 157"		4WD	109	102
Elevation Double Cab 147" w/3SB		4WD	109	101
Elevation Double Cab 147" w/3VL		4WD	109	101
Pro Crew Cab 147"		RWD	109	102
Pro Double Cab 147"		RWD	109	101
Pro Reg Cab 126"		RWD	109
Pro Reg Cab 140"		RWD	109
Pro Crew Cab 147"		4WD	109	102
Pro Crew Cab 157"		4WD	109	102
Pro Double Cab 147"		4WD	109	101
Pro Reg Cab 126"		4WD	109
Pro Reg Cab 140"		4WD	109
SLE Crew Cab 147"		RWD	109	102
SLE Double Cab 147"		RWD	109	101
SLE Crew Cab 147"		4WD	109	102
SLE Crew Cab 157"		4WD	109	102
SLE Double Cab 147"		4WD	109	101
SLT Crew Cab 147"	5.3L V8	RWD	109	102
SLT Crew Cab 147"	5.3L V8	4WD	109	102
SLT Crew Cab 157"	5.3L V8	4WD	109	102
AT4 Crew Cab 147"	3.0L I6	4WD	109	102
AT4 Crew Cab 157"	3.0L I6	4WD	109	102
AT4X Crew Cab 147"	3.0L I6	4WD	109	102
Denali Ultimate Crew Cab 147"	6.2L V8	4WD	109	102