Specifications Comparison: 2002 GMC Sierra 2500 vs 2018 GMC Sierra 2500

Headroom

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
2500 Extended Cab SL	6.0L V8	4WD	41	38.4
2500 Extended Cab SLE	6.0L V8	4WD	41	38.4
2500 Extended Cab SLT	6.0L V8	4WD	41	38.4
2500 Regular Cab SL	6.0L V8	RWD	41
2500 Regular Cab SLE	6.0L V8	RWD	41
HD 2500 Crew Cab SL	6.0L V8	RWD	41	39.9
HD 2500 Crew Cab SL	6.0L V8	4WD	41	39.9
HD 2500 Crew Cab SLE	6.0L V8	RWD	41	39.9
HD 2500 Crew Cab SLE	6.0L V8	4WD	41	39.9
HD 2500 Crew Cab SLT	6.0L V8	RWD	41	39.9
HD 2500 Crew Cab SLT	6.0L V8	4WD	41	39.9
HD 2500 Extended Cab SL	6.0L V8	RWD	41	38.4
HD 2500 Extended Cab SL	6.0L V8	4WD	41	38.4
HD 2500 Extended Cab SLE	6.0L V8	RWD	41	38.4
HD 2500 Extended Cab SLE	6.0L V8	4WD	41	38.4
HD 2500 Extended Cab SLT	6.0L V8	RWD	41	38.4
HD 2500 Extended Cab SLT	6.0L V8	4WD	41	38.4
HD 2500 Regular Cab SL	6.0L V8	RWD	41
HD 2500 Regular Cab SL	6.0L V8	4WD	41
HD 2500 Regular Cab SLE	6.0L V8	RWD	41
HD 2500 Regular Cab SLE	6.0L V8	4WD	41

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
HD 2500 Crew Cab	6.0L V8	RWD	42.8	40.5
HD 2500 Crew Cab	6.0L V8	4WD	42.8	40.5
HD 2500 Crew Cab Denali	6.0L V8	RWD	42.8	40.5
HD 2500 Crew Cab Denali	6.0L V8	4WD	42.8	40.5
HD 2500 Crew Cab SLE	6.0L V8	RWD	42.8	40.5
HD 2500 Crew Cab SLE	6.0L V8	4WD	42.8	40.5
HD 2500 Crew Cab SLT	6.0L V8	RWD	42.8	40.5
HD 2500 Crew Cab SLT	6.0L V8	4WD	42.8	40.5
HD 2500 Extended Cab	6.0L V8	RWD	42.8	38.7
HD 2500 Extended Cab	6.0L V8	4WD	42.8	38.7
HD 2500 Extended Cab SLE	6.0L V8	RWD	42.8	38.7
HD 2500 Extended Cab SLE	6.0L V8	4WD	42.8	38.7
HD 2500 Extended Cab SLT	6.0L V8	RWD	42.8	38.7
HD 2500 Extended Cab SLT	6.0L V8	4WD	42.8	38.7
HD 2500 Regular Cab	6.0L V8	RWD	42.8
HD 2500 Regular Cab	6.0L V8	4WD	42.8
HD 2500 Regular Cab SLE	6.0L V8	RWD	42.8
HD 2500 Regular Cab SLE	6.0L V8	4WD	42.8

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
2500 Extended Cab SL	6.0L V8	4WD	104.1	97.5
2500 Extended Cab SLE	6.0L V8	4WD	104.1	97.5
2500 Extended Cab SLT	6.0L V8	4WD	104.1	97.5
2500 Regular Cab SL	6.0L V8	RWD	104.1
2500 Regular Cab SLE	6.0L V8	RWD	104.1
HD 2500 Crew Cab SL	6.0L V8	RWD	104.1	101.3
HD 2500 Crew Cab SL	6.0L V8	4WD	104.1	101.3
HD 2500 Crew Cab SLE	6.0L V8	RWD	104.1	101.3
HD 2500 Crew Cab SLE	6.0L V8	4WD	104.1	101.3
HD 2500 Crew Cab SLT	6.0L V8	RWD	104.1	101.3
HD 2500 Crew Cab SLT	6.0L V8	4WD	104.1	101.3
HD 2500 Extended Cab SL	6.0L V8	RWD	104.1	97.5
HD 2500 Extended Cab SL	6.0L V8	4WD	104.1	97.5
HD 2500 Extended Cab SLE	6.0L V8	RWD	104.1	97.5
HD 2500 Extended Cab SLE	6.0L V8	4WD	104.1	97.5
HD 2500 Extended Cab SLT	6.0L V8	RWD	104.1	97.5
HD 2500 Extended Cab SLT	6.0L V8	4WD	104.1	97.5
HD 2500 Regular Cab SL	6.0L V8	RWD	104.1
HD 2500 Regular Cab SL	6.0L V8	4WD	104.1
HD 2500 Regular Cab SLE	6.0L V8	RWD	104.1
HD 2500 Regular Cab SLE	6.0L V8	4WD	104.1

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
HD 2500 Crew Cab	6.0L V8	RWD	108.7	102.9
HD 2500 Crew Cab	6.0L V8	4WD	108.7	102.9
HD 2500 Crew Cab Denali	6.0L V8	RWD	108.7	102.9
HD 2500 Crew Cab Denali	6.0L V8	4WD	108.7	102.9
HD 2500 Crew Cab SLE	6.0L V8	RWD	108.7	102.9
HD 2500 Crew Cab SLE	6.0L V8	4WD	108.7	102.9
HD 2500 Crew Cab SLT	6.0L V8	RWD	108.7	102.9
HD 2500 Crew Cab SLT	6.0L V8	4WD	108.7	102.9
HD 2500 Extended Cab	6.0L V8	RWD	108.7	98.3
HD 2500 Extended Cab	6.0L V8	4WD	108.7	98.3
HD 2500 Extended Cab SLE	6.0L V8	RWD	108.7	98.3
HD 2500 Extended Cab SLE	6.0L V8	4WD	108.7	98.3
HD 2500 Extended Cab SLT	6.0L V8	RWD	108.7	98.3
HD 2500 Extended Cab SLT	6.0L V8	4WD	108.7	98.3
HD 2500 Regular Cab	6.0L V8	RWD	108.7
HD 2500 Regular Cab	6.0L V8	4WD	108.7
HD 2500 Regular Cab SLE	6.0L V8	RWD	108.7
HD 2500 Regular Cab SLE	6.0L V8	4WD	108.7