Specifications Comparison: 2021 GMC Sierra 1500 vs 2023 GMC Sierra 1500

Legroom

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

2023 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	43
Denali Crew Cab 147"	5.3L V8	4WD	44	43
Denali Crew Cab 157"	5.3L V8	4WD	44	43
Elevation Crew Cab 147"	2.7L	RWD	44	43
Elevation Double Cab 147"	2.7L	RWD	44	35
Elevation Crew Cab 147" w/ 3SB	2.7L	4WD	44	43
Elevation Crew Cab 147" w/ 3VL	2.7L	4WD	44	43
Elevation Crew Cab 157"	2.7L	4WD	44	43
Elevation Double Cab 147" w/ 3SB	2.7L	4WD	44	35
Elevation Double Cab 147" w/ 3VL	2.7L	4WD	44	35
Pro Crew Cab 147"	2.7L	RWD	44	43
Pro Double Cab 147"	2.7L	RWD	44	35
Pro Reg Cab 126"	2.7L	RWD	44
Pro Reg Cab 140"	2.7L	RWD	44
Pro Crew Cab 147"	2.7L	4WD	44	43
Pro Crew Cab 157"	2.7L	4WD	44	43
Pro Double Cab 147"	2.7L	4WD	44	35
Pro Reg Cab 126"	2.7L	4WD	44
Pro Reg Cab 140"	2.7L	4WD	44
SLE Crew Cab 147"	2.7L	RWD	44	43
SLE Double Cab 147"	2.7L	RWD	44	35
SLE Crew Cab 147"	2.7L	4WD	44	43
SLE Crew Cab 157"	2.7L	4WD	44	43
SLE Double Cab 147"	2.7L	4WD	44	35
SLT Crew Cab 147"	5.3L V8	RWD	44	43
SLT Crew Cab 147"	5.3L V8	4WD	44	43
SLT Crew Cab 157"	5.3L V8	4WD	44	43
AT4 Crew Cab 147"	3.0L I6	4WD	44	43
AT4 Crew Cab 157"	3.0L I6	4WD	44	43
AT4X Crew Cab 147"	6.2L V8	4WD	44	43
Denali Ultimate Crew Cab 147"	6.2L V8	4WD	44	43

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

2023 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	111	109
Denali Crew Cab 147"	5.3L V8	4WD	111	109
Denali Crew Cab 157"	5.3L V8	4WD	111	109
Elevation Crew Cab 147"	2.7L	RWD	111	109
Elevation Double Cab 147"	2.7L	RWD	111	88
Elevation Crew Cab 147" w/ 3SB	2.7L	4WD	111	109
Elevation Crew Cab 147" w/ 3VL	2.7L	4WD	111	109
Elevation Crew Cab 157"	2.7L	4WD	111	109
Elevation Double Cab 147" w/ 3SB	2.7L	4WD	111	88
Elevation Double Cab 147" w/ 3VL	2.7L	4WD	111	88
Pro Crew Cab 147"	2.7L	RWD	111	109
Pro Double Cab 147"	2.7L	RWD	111	88
Pro Reg Cab 126"	2.7L	RWD	111
Pro Reg Cab 140"	2.7L	RWD	111
Pro Crew Cab 147"	2.7L	4WD	111	109
Pro Crew Cab 157"	2.7L	4WD	111	109
Pro Double Cab 147"	2.7L	4WD	111	88
Pro Reg Cab 126"	2.7L	4WD	111
Pro Reg Cab 140"	2.7L	4WD	111
SLE Crew Cab 147"	2.7L	RWD	111	109
SLE Double Cab 147"	2.7L	RWD	111	88
SLE Crew Cab 147"	2.7L	4WD	111	109
SLE Crew Cab 157"	2.7L	4WD	111	109
SLE Double Cab 147"	2.7L	4WD	111	88
SLT Crew Cab 147"	5.3L V8	RWD	111	109
SLT Crew Cab 147"	5.3L V8	4WD	111	109
SLT Crew Cab 157"	5.3L V8	4WD	111	109
AT4 Crew Cab 147"	3.0L I6	4WD	111	109
AT4 Crew Cab 157"	3.0L I6	4WD	111	109
AT4X Crew Cab 147"	6.2L V8	4WD	111	109
Denali Ultimate Crew Cab 147"	6.2L V8	4WD	111	109