Specifications Comparison: 2007 GMC Sierra 1500 vs 2020 GMC Sierra 1500

Headroom

2007 GMC Sierra 1500

Headroom (Imp.)

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

2020 GMC Sierra 1500

Headroom (Imp.)

Trim	Eng.	Drive train	1st Row Headroom (in)	2nd Row Headroom (in)
1500 Crew Cab 147" AT4	5.3L V8	4WD	43	40.1
1500 Crew Cab 157" AT4	5.3L V8	4WD	43	40.1
1500 Double Cab 147" AT4	5.3L V8	4WD	43	39.9
1500 Crew Cab 147"	4.3L V6	RWD	43	40.1
1500 Crew Cab 157"	4.3L V6	RWD	43	40.1
1500 Double Cab 147"	4.3L V6	RWD	43	39.9
1500 Reg Cab 140"	4.3L V6	RWD	43.1
1500 Crew Cab 147"	4.3L V6	4WD	43	40.1
1500 Crew Cab 157"	4.3L V6	4WD	43	40.1
1500 Double Cab 147"	4.3L V6	4WD	43	39.9
1500 Reg Cab 140"	4.3L V6	4WD	43.1
1500 Crew Cab 147" Denali	5.3L V8	RWD	43	40.1
1500 Crew Cab 157" Denali	5.3L V8	RWD	43	40.1
1500 Crew Cab 147" Denali	5.3L V8	4WD	43	40.1
1500 Crew Cab 157" Denali	5.3L V8	4WD	43	40.1
1500 Crew Cab 147" Elevation	2.7L	RWD	43	40.1
1500 Crew Cab 157" Elevation	2.7L	RWD	43	40.1
1500 Double Cab 147" Elevation	2.7L	RWD	43	39.9
1500 Crew Cab 147" Elevation	2.7L	4WD	43	40.1
1500 Crew Cab 157" Elevation	2.7L	4WD	43	40.1
1500 Double Cab 147" Elevation	2.7L	4WD	43	39.9
1500 Crew Cab 147" SLE	2.7L	RWD	43	40.1
1500 Crew Cab 157" SLE	2.7L	RWD	43	40.1
1500 Double Cab 147" SLE	2.7L	RWD	43	39.9
1500 Crew Cab 147" SLE	2.7L	4WD	43	40.1
1500 Crew Cab 157" SLE	2.7L	4WD	43	40.1
1500 Double Cab 147" SLE	2.7L	4WD	43	39.9
1500 Crew Cab 147" SLT	5.3L V8	RWD	43	40.1
1500 Crew Cab 157" SLT	5.3L V8	RWD	43	40.1
1500 Double Cab 147" SLT	5.3L V8	RWD	43	39.9
1500 Crew Cab 147" SLT	5.3L V8	4WD	43	40.1
1500 Crew Cab 157" SLT	5.3L V8	4WD	43	40.1
1500 Double Cab 147" SLT	5.3L V8	4WD	43	39.9
1500 Crew Cab	4.3L V6	RWD	43	40.1
1500 Crew Cab	4.3L V6	4WD	43	40.1
1500 Crew Cab AT4	5.3L V8	4WD	43	40.1
1500 Crew Cab Denali	5.3L V8	RWD	43	40.1
1500 Crew Cab Denali	5.3L V8	4WD	43	40.1
1500 Crew Cab Elevation	2.7L	RWD	43	40.1
1500 Crew Cab Elevation	2.7L	4WD	43	40.1
1500 Crew Cab SLE	2.7L	RWD	43	40.1
1500 Crew Cab SLE	2.7L	4WD	43	40.1
1500 Crew Cab SLT	5.3L V8	RWD	43	40.1
1500 Crew Cab SLT	5.3L V8	4WD	43	40.1
1500 Extended Cab	4.3L V6	RWD	43	39.9
1500 Extended Cab	4.3L V6	4WD	43	39.9
1500 Extended Cab AT4	5.3L V8	4WD	43	39.9
1500 Extended Cab Elevation	2.7L	RWD	43	39.9
1500 Extended Cab Elevation	2.7L	4WD	43	39.9
1500 Extended Cab SLE	2.7L	RWD	43	39.9
1500 Extended Cab SLE	2.7L	4WD	43	39.9
1500 Extended Cab SLT	5.3L V8	RWD	43	39.9
1500 Extended Cab SLT	5.3L V8	4WD	43	39.9
1500 Regular Cab	4.3L V6	RWD	43.1
1500 Regular Cab	4.3L V6	4WD	43.1

2007 GMC Sierra 1500

Headroom (Metric)

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

2007 GMC Sierra 1500

Headroom (Metric)

Trim	Eng.	Drive train	1st Row Headroom (cm)	2nd Row Headroom (cm)
1500 Crew Cab 147" AT4	5.3L V8	4WD	109.2	101.9
1500 Crew Cab 157" AT4	5.3L V8	4WD	109.2	101.9
1500 Double Cab 147" AT4	5.3L V8	4WD	109.2	101.3
1500 Crew Cab 147"	4.3L V6	RWD	109.2	101.9
1500 Crew Cab 157"	4.3L V6	RWD	109.2	101.9
1500 Double Cab 147"	4.3L V6	RWD	109.2	101.3
1500 Reg Cab 140"	4.3L V6	RWD	109.5
1500 Crew Cab 147"	4.3L V6	4WD	109.2	101.9
1500 Crew Cab 157"	4.3L V6	4WD	109.2	101.9
1500 Double Cab 147"	4.3L V6	4WD	109.2	101.3
1500 Reg Cab 140"	4.3L V6	4WD	109.5
1500 Crew Cab 147" Denali	5.3L V8	RWD	109.2	101.9
1500 Crew Cab 157" Denali	5.3L V8	RWD	109.2	101.9
1500 Crew Cab 147" Denali	5.3L V8	4WD	109.2	101.9
1500 Crew Cab 157" Denali	5.3L V8	4WD	109.2	101.9
1500 Crew Cab 147" Elevation	2.7L	RWD	109.2	101.9
1500 Crew Cab 157" Elevation	2.7L	RWD	109.2	101.9
1500 Double Cab 147" Elevation	2.7L	RWD	109.2	101.3
1500 Crew Cab 147" Elevation	2.7L	4WD	109.2	101.9
1500 Crew Cab 157" Elevation	2.7L	4WD	109.2	101.9
1500 Double Cab 147" Elevation	2.7L	4WD	109.2	101.3
1500 Crew Cab 147" SLE	2.7L	RWD	109.2	101.9
1500 Crew Cab 157" SLE	2.7L	RWD	109.2	101.9
1500 Double Cab 147" SLE	2.7L	RWD	109.2	101.3
1500 Crew Cab 147" SLE	2.7L	4WD	109.2	101.9
1500 Crew Cab 157" SLE	2.7L	4WD	109.2	101.9
1500 Double Cab 147" SLE	2.7L	4WD	109.2	101.3
1500 Crew Cab 147" SLT	5.3L V8	RWD	109.2	101.9
1500 Crew Cab 157" SLT	5.3L V8	RWD	109.2	101.9
1500 Double Cab 147" SLT	5.3L V8	RWD	109.2	101.3
1500 Crew Cab 147" SLT	5.3L V8	4WD	109.2	101.9
1500 Crew Cab 157" SLT	5.3L V8	4WD	109.2	101.9
1500 Double Cab 147" SLT	5.3L V8	4WD	109.2	101.3
1500 Crew Cab	4.3L V6	RWD	109.2	101.9
1500 Crew Cab	4.3L V6	4WD	109.2	101.9
1500 Crew Cab AT4	5.3L V8	4WD	109.2	101.9
1500 Crew Cab Denali	5.3L V8	RWD	109.2	101.9
1500 Crew Cab Denali	5.3L V8	4WD	109.2	101.9
1500 Crew Cab Elevation	2.7L	RWD	109.2	101.9
1500 Crew Cab Elevation	2.7L	4WD	109.2	101.9
1500 Crew Cab SLE	2.7L	RWD	109.2	101.9
1500 Crew Cab SLE	2.7L	4WD	109.2	101.9
1500 Crew Cab SLT	5.3L V8	RWD	109.2	101.9
1500 Crew Cab SLT	5.3L V8	4WD	109.2	101.9
1500 Extended Cab	4.3L V6	RWD	109.2	101.3
1500 Extended Cab	4.3L V6	4WD	109.2	101.3
1500 Extended Cab AT4	5.3L V8	4WD	109.2	101.3
1500 Extended Cab Elevation	2.7L	RWD	109.2	101.3
1500 Extended Cab Elevation	2.7L	4WD	109.2	101.3
1500 Extended Cab SLE	2.7L	RWD	109.2	101.3
1500 Extended Cab SLE	2.7L	4WD	109.2	101.3
1500 Extended Cab SLT	5.3L V8	RWD	109.2	101.3
1500 Extended Cab SLT	5.3L V8	4WD	109.2	101.3
1500 Regular Cab	4.3L V6	RWD	109.5
1500 Regular Cab	4.3L V6	4WD	109.5