Specifications Comparison: 2007 GMC Sierra 1500 vs 2003 GMC Sierra 1500

Headroom

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
1500 Extended Cab SLE	4.8L V8	4WD	41.5	39.3
1500 Regular Cab SLE	4.3L V6	4WD	41.5
1500 Crew Cab SL	4.8L V8	RWD	41.5	40.6
1500 Crew Cab SL	4.8L V8	4WD	41.5	40.6
1500 Crew Cab SLE	4.8L V8	RWD	41.5	40.6
1500 Crew Cab SLE	4.8L V8	4WD	41.5	40.6
1500 Crew Cab SLT	5.3L V8	RWD	41.5	40.6
1500 Crew Cab SLT	5.3L V8	4WD	41.5	40.6
1500 Extended Cab SLE	4.3L V6	RWD	41.5	39.3
1500 Extended Cab SLT	5.3L V8	RWD	41.5	39.3
1500 Extended Cab SLT	5.3L V8	4WD	41.5	39.3
1500 Regular Cab SLE	4.3L V6	RWD	41.5
Classic 1500 Crew Cab SL	4.8L V8	RWD	40.7	40.2
Classic 1500 Crew Cab SL	4.8L V8	4WD	40.7	40.2
Classic 1500 Crew Cab SLE	5.3L V8	RWD	40.7	40.2
Classic 1500 Crew Cab SLE	5.3L V8	4WD	40.7	40.2
Classic 1500 Crew Cab SLT	5.3L V8	RWD	40.7	40.2
Classic 1500 Crew Cab SLT	5.3L V8	4WD	40.7	40.2
Classic 1500 Extended Cab SLT	5.3L V8	RWD	41	38.4
Classic 1500 Extended Cab SLT	5.3L V8	4WD	41	38.4
Classic 1500 Extended Cab SLE	5.3L V8	RWD	41	38.4
Classic 1500 Extended Cab SLE	5.3L V8	4WD	41	38.4
HD Classic 1500 Crew Cab SLE	6.0L V8	RWD	41.1	39.9
HD Classic 1500 Crew Cab SLE	6.0L V8	4WD	41.1	39.9
HD Classic 1500 Crew Cab SLT	6.0L V8	RWD	41.1	39.9
HD Classic 1500 Crew Cab SLT	6.0L V8	4WD	41.1	39.9
Crew Cab Denali	6.2L V8	RWD	41.5	40.6
Crew Cab Denali	6.2L V8	AWD	41.5	40.6
Crew Cab Denali	6.0L V8	AWD	40.7	40.2

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
1500 Extended Cab	V6	RWD	41	38.4
1500 Extended Cab	V8	RWD	41	38.4
1500 Extended Cab SLE	V8	RWD	41	38.4
1500 Extended Cab SLE	V8	4WD	41	38.4
1500 Extended Cab SLT	V8	RWD	41	38.4
1500 Extended Cab SLT	V8	4WD	41	38.4
1500 Regular Cab	V6	RWD	41
1500 Regular Cab	V8	4WD	41
1500 Regular Cab SLE	V8	RWD	41
1500 Regular Cab SLE	V8	4WD	41
HD 1500 Crew Cab SLE	V8	RWD	41.1	39.9
HD 1500 Crew Cab SLE	V8	4WD	41.1	39.9
HD 1500 Crew Cab SLT	V8	RWD	41.1	39.9
HD 1500 Crew Cab SLT	V8	4WD	41.1	39.9
Extended Cab Denali	V8	AWD	41	38.4

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
1500 Extended Cab SLE	4.8L V8	4WD	105.4	99.8
1500 Regular Cab SLE	4.3L V6	4WD	105.4
1500 Crew Cab SL	4.8L V8	RWD	105.4	103.1
1500 Crew Cab SL	4.8L V8	4WD	105.4	103.1
1500 Crew Cab SLE	4.8L V8	RWD	105.4	103.1
1500 Crew Cab SLE	4.8L V8	4WD	105.4	103.1
1500 Crew Cab SLT	5.3L V8	RWD	105.4	103.1
1500 Crew Cab SLT	5.3L V8	4WD	105.4	103.1
1500 Extended Cab SLE	4.3L V6	RWD	105.4	99.8
1500 Extended Cab SLT	5.3L V8	RWD	105.4	99.8
1500 Extended Cab SLT	5.3L V8	4WD	105.4	99.8
1500 Regular Cab SLE	4.3L V6	RWD	105.4
Classic 1500 Crew Cab SL	4.8L V8	RWD	103.4	102.1
Classic 1500 Crew Cab SL	4.8L V8	4WD	103.4	102.1
Classic 1500 Crew Cab SLE	5.3L V8	RWD	103.4	102.1
Classic 1500 Crew Cab SLE	5.3L V8	4WD	103.4	102.1
Classic 1500 Crew Cab SLT	5.3L V8	RWD	103.4	102.1
Classic 1500 Crew Cab SLT	5.3L V8	4WD	103.4	102.1
Classic 1500 Extended Cab SLT	5.3L V8	RWD	104.1	97.5
Classic 1500 Extended Cab SLT	5.3L V8	4WD	104.1	97.5
Classic 1500 Extended Cab SLE	5.3L V8	RWD	104.1	97.5
Classic 1500 Extended Cab SLE	5.3L V8	4WD	104.1	97.5
HD Classic 1500 Crew Cab SLE	6.0L V8	RWD	104.4	101.3
HD Classic 1500 Crew Cab SLE	6.0L V8	4WD	104.4	101.3
HD Classic 1500 Crew Cab SLT	6.0L V8	RWD	104.4	101.3
HD Classic 1500 Crew Cab SLT	6.0L V8	4WD	104.4	101.3
Crew Cab Denali	6.2L V8	RWD	105.4	103.1
Crew Cab Denali	6.2L V8	AWD	105.4	103.1
Crew Cab Denali	6.0L V8	AWD	103.4	102.1

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
1500 Extended Cab	V6	RWD	104.1	97.5
1500 Extended Cab	V8	RWD	104.1	97.5
1500 Extended Cab SLE	V8	RWD	104.1	97.5
1500 Extended Cab SLE	V8	4WD	104.1	97.5
1500 Extended Cab SLT	V8	RWD	104.1	97.5
1500 Extended Cab SLT	V8	4WD	104.1	97.5
1500 Regular Cab	V6	RWD	104.1
1500 Regular Cab	V8	4WD	104.1
1500 Regular Cab SLE	V8	RWD	104.1
1500 Regular Cab SLE	V8	4WD	104.1
HD 1500 Crew Cab SLE	V8	RWD	104.4	101.3
HD 1500 Crew Cab SLE	V8	4WD	104.4	101.3
HD 1500 Crew Cab SLT	V8	RWD	104.4	101.3
HD 1500 Crew Cab SLT	V8	4WD	104.4	101.3
Extended Cab Denali	V8	AWD	104.1	97.5