Specifications Comparison: 2020 GMC Sierra 3500 vs 2014 GMC Sierra 3500

Headroom

2020 GMC Sierra 3500

Headroom (Imp.)

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
HD 3500 Crew Cab 159" AT4	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab 172" AT4	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab 159"	6.6L V8	RWD	43	40.1
HD 3500 Crew Cab 172"	6.6L V8	RWD	43	40.1
HD 3500 Double Cab 162"	6.6L V8	RWD	43	39.9
HD 3500 Reg Cab 142"	6.6L V8	RWD	43.1
HD 3500 Crew Cab 159"	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab 172"	6.6L V8	4WD	43	40.1
HD 3500 Double Cab 162"	6.6L V8	4WD	43	39.9
HD 3500 Reg Cab 142"	6.6L V8	4WD	43.1
HD 3500 Crew Cab 159" Denali	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab 172" Denali	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab 159" SLE	6.6L V8	RWD	43	40.1
HD 3500 Crew Cab 172" SLE	6.6L V8	RWD	43	40.1
HD 3500 Double Cab 162" SLE	6.6L V8	RWD	43	39.9
HD 3500 Reg Cab 142" SLE	6.6L V8	RWD	43.1
HD 3500 Crew Cab 159" SLE	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab 172" SLE	6.6L V8	4WD	43	40.1
HD 3500 Double Cab 162" SLE	6.6L V8	4WD	43	39.9
HD 3500 Reg Cab 142" SLE	6.6L V8	4WD	43.1
HD 3500 Crew Cab 159" SLT	6.6L V8	RWD	43	40.1
HD 3500 Crew Cab 172" SLT	6.6L V8	RWD	43	40.1
HD 3500 Crew Cab 159" SLT	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab 172" SLT	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab	6.6L V8	RWD	43	40.1
HD 3500 Crew Cab	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab AT4	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab Denali	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab SLE	6.6L V8	RWD	43	40.1
HD 3500 Crew Cab SLE	6.6L V8	4WD	43	40.1
HD 3500 Crew Cab SLT	6.6L V8	RWD	43	40.1
HD 3500 Crew Cab SLT	6.6L V8	4WD	43	40.1
HD 3500 Extended Cab	6.6L V8	RWD	43	39.9
HD 3500 Extended Cab	6.6L V8	4WD	43	39.9
HD 3500 Extended Cab SLE	6.6L V8	RWD	43	39.9
HD 3500 Extended Cab SLE	6.6L V8	4WD	43	39.9
HD 3500 Regular Cab	6.6L V8	RWD	43.1
HD 3500 Regular Cab	6.6L V8	4WD	43.1
HD 3500 Regular Cab SLE	6.6L V8	RWD	43.1
HD 3500 Regular Cab SLE	6.6L V8	4WD	43.1

2014 GMC Sierra 3500

Headroom (Imp.)

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
HD 3500 Crew Cab Denali	6.0L V8	RWD	41.3	40.6
HD 3500 Crew Cab Denali	6.0L V8	4WD	41.3	40.6
HD 3500 Crew Cab SLE	6.0L V8	RWD	41.3	40.6
HD 3500 Crew Cab SLE	6.0L V8	4WD	41.3	40.6
HD 3500 Crew Cab SLT	6.0L V8	RWD	41.3	40.6
HD 3500 Crew Cab SLT	6.0L V8	4WD	41.3	40.6
HD 3500 Regular Cab SLE	6.0L V8	RWD	41.3
HD 3500 Regular Cab SLE	6.0L V8	4WD	41.3

2020 GMC Sierra 3500

Headroom (Metric)

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
HD 3500 Crew Cab 159" AT4	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab 172" AT4	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab 159"	6.6L V8	RWD	109.2	101.9
HD 3500 Crew Cab 172"	6.6L V8	RWD	109.2	101.9
HD 3500 Double Cab 162"	6.6L V8	RWD	109.2	101.3
HD 3500 Reg Cab 142"	6.6L V8	RWD	109.5
HD 3500 Crew Cab 159"	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab 172"	6.6L V8	4WD	109.2	101.9
HD 3500 Double Cab 162"	6.6L V8	4WD	109.2	101.3
HD 3500 Reg Cab 142"	6.6L V8	4WD	109.5
HD 3500 Crew Cab 159" Denali	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab 172" Denali	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab 159" SLE	6.6L V8	RWD	109.2	101.9
HD 3500 Crew Cab 172" SLE	6.6L V8	RWD	109.2	101.9
HD 3500 Double Cab 162" SLE	6.6L V8	RWD	109.2	101.3
HD 3500 Reg Cab 142" SLE	6.6L V8	RWD	109.5
HD 3500 Crew Cab 159" SLE	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab 172" SLE	6.6L V8	4WD	109.2	101.9
HD 3500 Double Cab 162" SLE	6.6L V8	4WD	109.2	101.3
HD 3500 Reg Cab 142" SLE	6.6L V8	4WD	109.5
HD 3500 Crew Cab 159" SLT	6.6L V8	RWD	109.2	101.9
HD 3500 Crew Cab 172" SLT	6.6L V8	RWD	109.2	101.9
HD 3500 Crew Cab 159" SLT	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab 172" SLT	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab	6.6L V8	RWD	109.2	101.9
HD 3500 Crew Cab	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab AT4	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab Denali	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab SLE	6.6L V8	RWD	109.2	101.9
HD 3500 Crew Cab SLE	6.6L V8	4WD	109.2	101.9
HD 3500 Crew Cab SLT	6.6L V8	RWD	109.2	101.9
HD 3500 Crew Cab SLT	6.6L V8	4WD	109.2	101.9
HD 3500 Extended Cab	6.6L V8	RWD	109.2	101.3
HD 3500 Extended Cab	6.6L V8	4WD	109.2	101.3
HD 3500 Extended Cab SLE	6.6L V8	RWD	109.2	101.3
HD 3500 Extended Cab SLE	6.6L V8	4WD	109.2	101.3
HD 3500 Regular Cab	6.6L V8	RWD	109.5
HD 3500 Regular Cab	6.6L V8	4WD	109.5
HD 3500 Regular Cab SLE	6.6L V8	RWD	109.5
HD 3500 Regular Cab SLE	6.6L V8	4WD	109.5

2020 GMC Sierra 3500

Headroom (Metric)

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
HD 3500 Crew Cab Denali	6.0L V8	RWD	104.9	103.1
HD 3500 Crew Cab Denali	6.0L V8	4WD	104.9	103.1
HD 3500 Crew Cab SLE	6.0L V8	RWD	104.9	103.1
HD 3500 Crew Cab SLE	6.0L V8	4WD	104.9	103.1
HD 3500 Crew Cab SLT	6.0L V8	RWD	104.9	103.1
HD 3500 Crew Cab SLT	6.0L V8	4WD	104.9	103.1
HD 3500 Regular Cab SLE	6.0L V8	RWD	104.9
HD 3500 Regular Cab SLE	6.0L V8	4WD	104.9