Specifications Comparison: 2024 GMC Sierra 1500 vs 2021 GMC Sierra 1500

Legroom

2024 GMC Sierra 1500

Legroom (Imp.)

Trim	Eng.	Drive train	1st Row Legroom (in)	2nd Row Legroom (in)
Denali Crew Cab 147"	5.3L V8	RWD	44.53	43.4
Denali Crew Cab 147"	5.3L V8	4WD	44.53	43.4
Denali Crew Cab 157"	5.3L V8	4WD	44.53	43.4
Elevation Crew Cab 147"		RWD	44.53	43.4
Elevation Double Cab 147"		RWD	44.53	35.24
Elevation Crew Cab 147" w/3SB		4WD	44.53	43.4
Elevation Crew Cab 147" w/3VL		4WD	44.53	43.4
Elevation Crew Cab 157"		4WD	44.53	43.4
Elevation Double Cab 147" w/3SB		4WD	44.53	35.24
Elevation Double Cab 147" w/3VL		4WD	44.53	35.24
Pro Crew Cab 147"		RWD	44.53	43.4
Pro Double Cab 147"		RWD	44.53	35.24
Pro Reg Cab 126"		RWD	44.53
Pro Reg Cab 140"		RWD	44.53
Pro Crew Cab 147"		4WD	44.53	43.4
Pro Crew Cab 157"		4WD	44.53	43.4
Pro Double Cab 147"		4WD	44.53	35.24
Pro Reg Cab 126"		4WD	44.53
Pro Reg Cab 140"		4WD	44.53
SLE Crew Cab 147"		RWD	44.53	43.4
SLE Double Cab 147"		RWD	44.53	35.24
SLE Crew Cab 147"		4WD	44.53	43.4
SLE Crew Cab 157"		4WD	44.53	43.4
SLE Double Cab 147"		4WD	44.53	35.24
SLT Crew Cab 147"	5.3L V8	RWD	44.53	43.4
SLT Crew Cab 147"	5.3L V8	4WD	44.53	43.4
SLT Crew Cab 157"	5.3L V8	4WD	44.53	43.4
AT4 Crew Cab 147"	3.0L I6	4WD	44.53	43.4
AT4 Crew Cab 157"	3.0L I6	4WD	44.53	43.4
AT4X Crew Cab 147"	3.0L I6	4WD	44.53	43.4
Denali Ultimate Crew Cab 147"	6.2L V8	4WD	44.53	43.4

2021 GMC Sierra 1500

Legroom (Imp.)

Trim	Eng.	Drive train	1st Row Legroom (in)	2nd Row Legroom (in)
Crew Cab	4.3L V6	RWD	44	43
Crew Cab	5.3L V8	RWD	44	43
Crew Cab	2.7L	RWD	44	43
Crew Cab	4.3L V6	4WD	44	43
Crew Cab	5.3L V8	4WD	44	43
Crew Cab	2.7L	4WD	44	43
Crew Cab AT4	5.3L V8	4WD	44	43
Crew Cab AT4	3.0L I6	4WD	44	43
Crew Cab AT4	6.2L V8	4WD	44	43
Crew Cab Denali	5.3L V8	RWD	44	43
Crew Cab Denali	3.0L I6	RWD	44	43
Crew Cab Denali	5.3L V8	4WD	44	43
Crew Cab Denali	3.0L I6	4WD	44	43
Crew Cab Denali	6.2L V8	4WD	44	43
Crew Cab Elevation	2.7L	RWD	44	43
Crew Cab Elevation	5.3L V8	RWD	44	43
Crew Cab Elevation	3.0L I6	RWD	44	43
Crew Cab Elevation 3VL	2.7L	4WD	44	43
Crew Cab Elevation	2.7L	4WD	44	43
Crew Cab Elevation	5.3L V8	4WD	44	43
Crew Cab Elevation	3.0L I6	4WD	44	43
Crew Cab SLE	2.7L	RWD	44	43
Crew Cab SLE	5.3L V8	RWD	44	43
Crew Cab SLE	3.0L I6	RWD	44	43
Crew Cab SLE	2.7L	4WD	44	43
Crew Cab SLE	5.3L V8	4WD	44	43
Crew Cab SLE	3.0L I6	4WD	44	43
Crew Cab SLT	5.3L V8	RWD	44	43
Crew Cab SLT	3.0L I6	RWD	44	43
Crew Cab SLT	5.3L V8	4WD	44	43
Crew Cab SLT	5.3L I6	4WD	44	43
Crew Cab SLT	3.0L V8	4WD	44	43
Extended Cab	4.3L V6	RWD	44	35
Extended Cab	5.3L V8	RWD	44	35
Extended Cab	2.7L	RWD	44	35
Extended Cab	4.3L V6	4WD	44	35
Extended Cab	5.3L V8	4WD	44	35
Extended Cab	2.7L	4WD	44	35
Extended Cab Elevation	2.7L	RWD	44	35
Extended Cab Elevation	5.3L V8	RWD	44	35
Extended Cab Elevation	3.0L I6	RWD	44	35
Extended Cab Elevation 3VL	2.7L	4WD	44	35
Extended Cab Elevation	2.7L	4WD	44	35
Extended Cab Elevation	5.3L V8	4WD	44	35
Extended Cab Elevation	3.0L I6	4WD	44	35
Extended Cab SLE	2.7L	RWD	44	35
Extended Cab SLE	5.3L V8	RWD	44	35
Extended Cab SLE	3.0L I6	RWD	44	35
Extended Cab SLE	2.7L	4WD	44	35
Extended Cab SLE	5.3L V8	4WD	44	35
Extended Cab SLE	3.0L I6	4WD	44	35
Regular Cab	4.3L V6	RWD	44
Regular Cab	5.3L V8	RWD	44
Regular Cab	4.3L V6	4WD	44
Regular Cab	5.3L V8	4WD	44

2024 GMC Sierra 1500

Legroom (Metric)

Trim	Eng.	Drive train	1st Row Legroom (cm)	2nd Row Legroom (cm)
Denali Crew Cab 147"	5.3L V8	RWD	113	110
Denali Crew Cab 147"	5.3L V8	4WD	113	110
Denali Crew Cab 157"	5.3L V8	4WD	113	110
Elevation Crew Cab 147"		RWD	113	110
Elevation Double Cab 147"		RWD	113	90
Elevation Crew Cab 147" w/3SB		4WD	113	110
Elevation Crew Cab 147" w/3VL		4WD	113	110
Elevation Crew Cab 157"		4WD	113	110
Elevation Double Cab 147" w/3SB		4WD	113	90
Elevation Double Cab 147" w/3VL		4WD	113	90
Pro Crew Cab 147"		RWD	113	110
Pro Double Cab 147"		RWD	113	90
Pro Reg Cab 126"		RWD	113
Pro Reg Cab 140"		RWD	113
Pro Crew Cab 147"		4WD	113	110
Pro Crew Cab 157"		4WD	113	110
Pro Double Cab 147"		4WD	113	90
Pro Reg Cab 126"		4WD	113
Pro Reg Cab 140"		4WD	113
SLE Crew Cab 147"		RWD	113	110
SLE Double Cab 147"		RWD	113	90
SLE Crew Cab 147"		4WD	113	110
SLE Crew Cab 157"		4WD	113	110
SLE Double Cab 147"		4WD	113	90
SLT Crew Cab 147"	5.3L V8	RWD	113	110
SLT Crew Cab 147"	5.3L V8	4WD	113	110
SLT Crew Cab 157"	5.3L V8	4WD	113	110
AT4 Crew Cab 147"	3.0L I6	4WD	113	110
AT4 Crew Cab 157"	3.0L I6	4WD	113	110
AT4X Crew Cab 147"	3.0L I6	4WD	113	110
Denali Ultimate Crew Cab 147"	6.2L V8	4WD	113	110

2021 GMC Sierra 1500

Legroom (Metric)

Trim	Eng.	Drive train	1st Row Legroom (cm)	2nd Row Legroom (cm)
Crew Cab	4.3L V6	RWD	111	109
Crew Cab	5.3L V8	RWD	111	109
Crew Cab	2.7L	RWD	111	109
Crew Cab	4.3L V6	4WD	111	109
Crew Cab	5.3L V8	4WD	111	109
Crew Cab	2.7L	4WD	111	109
Crew Cab AT4	5.3L V8	4WD	111	109
Crew Cab AT4	3.0L I6	4WD	111	109
Crew Cab AT4	6.2L V8	4WD	111	109
Crew Cab Denali	5.3L V8	RWD	111	109
Crew Cab Denali	3.0L I6	RWD	111	109
Crew Cab Denali	5.3L V8	4WD	111	109
Crew Cab Denali	3.0L I6	4WD	111	109
Crew Cab Denali	6.2L V8	4WD	111	109
Crew Cab Elevation	2.7L	RWD	111	109
Crew Cab Elevation	5.3L V8	RWD	111	109
Crew Cab Elevation	3.0L I6	RWD	111	109
Crew Cab Elevation 3VL	2.7L	4WD	111	109
Crew Cab Elevation	2.7L	4WD	111	109
Crew Cab Elevation	5.3L V8	4WD	111	109
Crew Cab Elevation	3.0L I6	4WD	111	109
Crew Cab SLE	2.7L	RWD	111	109
Crew Cab SLE	5.3L V8	RWD	111	109
Crew Cab SLE	3.0L I6	RWD	111	109
Crew Cab SLE	2.7L	4WD	111	109
Crew Cab SLE	5.3L V8	4WD	111	109
Crew Cab SLE	3.0L I6	4WD	111	109
Crew Cab SLT	5.3L V8	RWD	111	109
Crew Cab SLT	3.0L I6	RWD	111	109
Crew Cab SLT	5.3L V8	4WD	111	109
Crew Cab SLT	5.3L I6	4WD	111	109
Crew Cab SLT	3.0L V8	4WD	111	109
Extended Cab	4.3L V6	RWD	111	88
Extended Cab	5.3L V8	RWD	111	88
Extended Cab	2.7L	RWD	111	88
Extended Cab	4.3L V6	4WD	111	88
Extended Cab	5.3L V8	4WD	111	88
Extended Cab	2.7L	4WD	111	88
Extended Cab Elevation	2.7L	RWD	111	88
Extended Cab Elevation	5.3L V8	RWD	111	88
Extended Cab Elevation	3.0L I6	RWD	111	88
Extended Cab Elevation 3VL	2.7L	4WD	111	88
Extended Cab Elevation	2.7L	4WD	111	88
Extended Cab Elevation	5.3L V8	4WD	111	88
Extended Cab Elevation	3.0L I6	4WD	111	88
Extended Cab SLE	2.7L	RWD	111	88
Extended Cab SLE	5.3L V8	RWD	111	88
Extended Cab SLE	3.0L I6	RWD	111	88
Extended Cab SLE	2.7L	4WD	111	88
Extended Cab SLE	5.3L V8	4WD	111	88
Extended Cab SLE	3.0L I6	4WD	111	88
Regular Cab	4.3L V6	RWD	111
Regular Cab	5.3L V8	RWD	111
Regular Cab	4.3L V6	4WD	111
Regular Cab	5.3L V8	4WD	111