Specifications Comparison: 2012 GMC Sierra 3500 vs 2019 GMC Sierra 3500

Headroom

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 Extended Cab SLE	6.0L V8	RWD	41.1	39.5
HD 3500 Extended Cab SLE	6.0L V8	4WD	41.1	39.5
HD 3500 Extended Cab SLT	6.0L V8	RWD	41.1	39.5
HD 3500 Extended Cab SLT	6.0L V8	4WD	41.1	39.5
HD 3500 Regular Cab SLE	6.0L V8	RWD	41.3
HD 3500 Regular Cab SLE	6.0L V8	4WD	41.3

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
HD 3500 Crew Cab 153.7"	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 167.7"	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 153.7"	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab 167.7"	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab 153.7" Denali	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 167.7" Denali	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 153.7" Denali	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab 167.7" Denali	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab 153.7" SLE	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 167.7" SLE	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 153.7" SLE	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab 167.7" SLE	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab 153.7" SLT	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 167.7" SLT	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab 153.7" SLT	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab 167.7" SLT	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab Denali	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab Denali	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab SLE	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab SLE	6.0L V8	4WD	42.8	40.5
HD 3500 Crew Cab SLT	6.0L V8	RWD	42.8	40.5
HD 3500 Crew Cab SLT	6.0L V8	4WD	42.8	40.5

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 Extended Cab SLE	6.0L V8	RWD	104.4	100.3
HD 3500 Extended Cab SLE	6.0L V8	4WD	104.4	100.3
HD 3500 Extended Cab SLT	6.0L V8	RWD	104.4	100.3
HD 3500 Extended Cab SLT	6.0L V8	4WD	104.4	100.3
HD 3500 Regular Cab SLE	6.0L V8	RWD	104.9
HD 3500 Regular Cab SLE	6.0L V8	4WD	104.9

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
HD 3500 Crew Cab 153.7"	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 167.7"	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 153.7"	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab 167.7"	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab 153.7" Denali	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 167.7" Denali	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 153.7" Denali	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab 167.7" Denali	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab 153.7" SLE	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 167.7" SLE	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 153.7" SLE	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab 167.7" SLE	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab 153.7" SLT	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 167.7" SLT	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab 153.7" SLT	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab 167.7" SLT	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab Denali	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab Denali	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab SLE	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab SLE	6.0L V8	4WD	108.7	102.9
HD 3500 Crew Cab SLT	6.0L V8	RWD	108.7	102.9
HD 3500 Crew Cab SLT	6.0L V8	4WD	108.7	102.9