Specifications Comparison: 2004 GMC Sierra 2500 vs 2015 GMC Sierra 2500

Legroom

Trim	Eng.	Drive train	1st Row Legroom (in)	2nd Row Legroom (in)
2500 Extended Cab	V8	RWD	41.3	33.7
2500 Extended Cab SLE	V8	4WD	41.3	33.7
2500 Extended Cab SLT	V8	4WD	41.3	33.7
2500 Regular Cab	V8	RWD	41.3
2500 Regular Cab SLE	V8	RWD	41.3
Crew Cab 2500 SLE	V8	RWD	41.3	38.8
Crew Cab 2500 SLE	V8	4WD	41.3	38.8
Crew Cab 2500 SLT	V8	RWD	41.3	38.8
Crew Cab 2500 SLT	V8	4WD	41.3	38.8
HD 2500 Crew Cab	V8	RWD	41.3	38.8
HD 2500 Crew Cab	V8	4WD	41.3	38.8
HD 2500 Crew Cab SLE	V8	RWD	41.3	38.8
HD 2500 Crew Cab SLE	V8	4WD	41.3	38.8
HD 2500 Crew Cab SLT	V8	RWD	41.3	38.8
HD 2500 Crew Cab SLT	V8	4WD	41.3	38.8
HD 2500 Extended Cab	V8	RWD	41.3	33.7
HD 2500 Extended Cab	V8	4WD	41.3	33.7
HD 2500 Extended Cab SLE	V8	RWD	41.3	33.7
HD 2500 Extended Cab SLE	V8	4WD	41.3	33.7
HD 2500 Extended Cab SLT	V8	RWD	41.3	33.7
HD 2500 Extended Cab SLT	V8	4WD	41.3	33.7
HD 2500 Regular Cab	V8	RWD	41.3
HD 2500 Regular Cab	V8	4WD	41.3
HD 2500 Regular Cab SLE	V8	RWD	41.3
HD 2500 Regular Cab SLE	V8	4WD	41.3

Trim	Eng.	Drive train	1st Row Legroom (in)	2nd Row Legroom (in)
HD 2500 Crew Cab Denali	6.0L V8	RWD	45.3	40.9
HD 2500 Crew Cab Denali	6.0L V8	4WD	45.3	40.9
HD 2500 Crew Cab SLE	6.0L V8	RWD	45.3	40.9
HD 2500 Crew Cab SLE	6.0L V8	4WD	45.3	40.9
HD 2500 Crew Cab SLT	6.0L V8	RWD	45.3	40.9
HD 2500 Crew Cab SLT	6.0L V8	4WD	45.3	40.9
HD 2500 Crew Cab Work	6.0L V8	RWD	45.3	40.9
HD 2500 Crew Cab Work	6.0L V8	4WD	45.3	40.9
HD 2500 Extended Cab SLE	6.0L V8	RWD	45.3	34.6
HD 2500 Extended Cab SLE	6.0L V8	4WD	45.3	34.6
HD 2500 Extended Cab SLT	6.0L V8	RWD	45.3	34.6
HD 2500 Extended Cab SLT	6.0L V8	4WD	45.3	34.6
HD 2500 Extended Cab Work	6.0L V8	RWD	45.3	34.6
HD 2500 Extended Cab Work	6.0L V8	4WD	45.3	34.6
HD 2500 Regular Cab SLE	6.0L V8	RWD	45.3
HD 2500 Regular Cab SLE	6.0L V8	4WD	45.3
HD 2500 Regular Cab Work	6.0L V8	RWD	45.3
HD 2500 Regular Cab Work	6.0L V8	4WD	45.3

Trim	Eng.	Drive train	1st Row Legroom (cm)	2nd Row Legroom (cm)
2500 Extended Cab	V8	RWD	104.9	85.6
2500 Extended Cab SLE	V8	4WD	104.9	85.6
2500 Extended Cab SLT	V8	4WD	104.9	85.6
2500 Regular Cab	V8	RWD	104.9
2500 Regular Cab SLE	V8	RWD	104.9
Crew Cab 2500 SLE	V8	RWD	104.9	98.6
Crew Cab 2500 SLE	V8	4WD	104.9	98.6
Crew Cab 2500 SLT	V8	RWD	104.9	98.6
Crew Cab 2500 SLT	V8	4WD	104.9	98.6
HD 2500 Crew Cab	V8	RWD	104.9	98.6
HD 2500 Crew Cab	V8	4WD	104.9	98.6
HD 2500 Crew Cab SLE	V8	RWD	104.9	98.6
HD 2500 Crew Cab SLE	V8	4WD	104.9	98.6
HD 2500 Crew Cab SLT	V8	RWD	104.9	98.6
HD 2500 Crew Cab SLT	V8	4WD	104.9	98.6
HD 2500 Extended Cab	V8	RWD	104.9	85.6
HD 2500 Extended Cab	V8	4WD	104.9	85.6
HD 2500 Extended Cab SLE	V8	RWD	104.9	85.6
HD 2500 Extended Cab SLE	V8	4WD	104.9	85.6
HD 2500 Extended Cab SLT	V8	RWD	104.9	85.6
HD 2500 Extended Cab SLT	V8	4WD	104.9	85.6
HD 2500 Regular Cab	V8	RWD	104.9
HD 2500 Regular Cab	V8	4WD	104.9
HD 2500 Regular Cab SLE	V8	RWD	104.9
HD 2500 Regular Cab SLE	V8	4WD	104.9

Trim	Eng.	Drive train	1st Row Legroom (cm)	2nd Row Legroom (cm)
HD 2500 Crew Cab Denali	6.0L V8	RWD	115.1	103.9
HD 2500 Crew Cab Denali	6.0L V8	4WD	115.1	103.9
HD 2500 Crew Cab SLE	6.0L V8	RWD	115.1	103.9
HD 2500 Crew Cab SLE	6.0L V8	4WD	115.1	103.9
HD 2500 Crew Cab SLT	6.0L V8	RWD	115.1	103.9
HD 2500 Crew Cab SLT	6.0L V8	4WD	115.1	103.9
HD 2500 Crew Cab Work	6.0L V8	RWD	115.1	103.9
HD 2500 Crew Cab Work	6.0L V8	4WD	115.1	103.9
HD 2500 Extended Cab SLE	6.0L V8	RWD	115.1	87.9
HD 2500 Extended Cab SLE	6.0L V8	4WD	115.1	87.9
HD 2500 Extended Cab SLT	6.0L V8	RWD	115.1	87.9
HD 2500 Extended Cab SLT	6.0L V8	4WD	115.1	87.9
HD 2500 Extended Cab Work	6.0L V8	RWD	115.1	87.9
HD 2500 Extended Cab Work	6.0L V8	4WD	115.1	87.9
HD 2500 Regular Cab SLE	6.0L V8	RWD	115.1
HD 2500 Regular Cab SLE	6.0L V8	4WD	115.1
HD 2500 Regular Cab Work	6.0L V8	RWD	115.1
HD 2500 Regular Cab Work	6.0L V8	4WD	115.1