Specifications Comparison: 2021 GMC Sierra 2500 vs 2004 GMC Sierra 2500

Engine Horsepower & Torque

Trim	Eng.	Drive train	HP	Torque (ft-lbs)
HD Crew Cab	6.6L V8	RWD	401	464
HD Crew Cab	6.6L V8	RWD	445	910
HD Crew Cab	6.6L V8	4WD	401	464
HD Crew Cab	6.6L V8	4WD	445	910
HD Crew Cab AT4	6.6L V8	4WD	401	464
HD Crew Cab AT4	6.6L V8	4WD	445	910
HD Crew Cab Denali	6.6L V8	4WD	401	464
HD Crew Cab Denali	6.6L V8	4WD	445	910
HD Crew Cab SLE	6.6L V8	RWD	401	464
HD Crew Cab SLE	6.6L V8	RWD	445	910
HD Crew Cab SLE	6.6L V8	4WD	401	464
HD Crew Cab SLE	6.6L V8	4WD	445	910
HD Crew Cab SLT	6.6L V8	RWD	401	464
HD Crew Cab SLT	6.6L V8	RWD	445	910
HD Crew Cab SLT	6.6L V8	4WD	401	464
HD Crew Cab SLT	6.6L V8	4WD	445	910
HD Extended Cab	6.6L V8	RWD	401	464
HD Extended Cab	6.6L V8	RWD	445	910
HD Extended Cab	6.6L V8	4WD	401	464
HD Extended Cab	6.6L V8	4WD	445	910
HD Extended Cab SLE	6.6L V8	RWD	401	464
HD Extended Cab SLE	6.6L V8	RWD	445	910
HD Extended Cab SLE	6.6L V8	4WD	401	464
HD Extended Cab SLE	6.6L V8	4WD	445	910
HD Extended Cab SLT	6.6L V8	RWD	401	464
HD Extended Cab SLT	6.6L V8	RWD	445	910
HD Extended Cab SLT	6.6L V8	4WD	401	464
HD Extended Cab SLT	6.6L V8	4WD	445	910
HD Regular Cab	6.6L V8	RWD	401	464
HD Regular Cab	6.6L V8	RWD	445	910
HD Regular Cab	6.6L V8	4WD	401	464
HD Regular Cab	6.6L V8	4WD	445	910
HD Regular Cab SLE	6.6L V8	RWD	401	464
HD Regular Cab SLE	6.6L V8	RWD	445	910
HD Regular Cab SLE	6.6L V8	4WD	401	464
HD Regular Cab SLE	6.6L V8	4WD	445	910

Trim	Eng.	Drive train	HP	Torque (ft-lbs)
2500 Extended Cab	V8	RWD	300	360
2500 Extended Cab SLE	V8	4WD	300	360
2500 Extended Cab SLT	V8	4WD	300	360
2500 Regular Cab	V8	RWD	300	360
2500 Regular Cab SLE	V8	RWD	300	360
Crew Cab 2500 SLE	V8	RWD	300	360
Crew Cab 2500 SLE	V8	4WD	300	360
Crew Cab 2500 SLT	V8	RWD	300	360
Crew Cab 2500 SLT	V8	4WD	300	360
HD 2500 Crew Cab	V8	RWD	300	360
HD 2500 Crew Cab	V8	4WD	300	360
HD 2500 Crew Cab SLE	V8	RWD	300	360
HD 2500 Crew Cab SLE	V8	4WD	300	360
HD 2500 Crew Cab SLT	V8	RWD	300	360
HD 2500 Crew Cab SLT	V8	4WD	300	360
HD 2500 Extended Cab	V8	RWD	300	360
HD 2500 Extended Cab	V8	4WD	300	360
HD 2500 Extended Cab SLE	V8	RWD	300	360
HD 2500 Extended Cab SLE	V8	4WD	300	360
HD 2500 Extended Cab SLT	V8	RWD	300	360
HD 2500 Extended Cab SLT	V8	4WD	300	360
HD 2500 Regular Cab	V8	RWD	300	360
HD 2500 Regular Cab	V8	4WD	300	360
HD 2500 Regular Cab SLE	V8	RWD	300	360
HD 2500 Regular Cab SLE	V8	4WD	300	360

Trim	Eng.	Drive train	HP Per Liter	HP Per Inch³
HD Crew Cab	6.6L V8	RWD	60	1.0
HD Crew Cab	6.6L V8	RWD	67	1.11
HD Crew Cab	6.6L V8	4WD	60	1.0
HD Crew Cab	6.6L V8	4WD	67	1.11
HD Crew Cab AT4	6.6L V8	4WD	60	1.0
HD Crew Cab AT4	6.6L V8	4WD	67	1.11
HD Crew Cab Denali	6.6L V8	4WD	60	1.0
HD Crew Cab Denali	6.6L V8	4WD	67	1.11
HD Crew Cab SLE	6.6L V8	RWD	60	1.0
HD Crew Cab SLE	6.6L V8	RWD	67	1.11
HD Crew Cab SLE	6.6L V8	4WD	60	1.0
HD Crew Cab SLE	6.6L V8	4WD	67	1.11
HD Crew Cab SLT	6.6L V8	RWD	60	1.0
HD Crew Cab SLT	6.6L V8	RWD	67	1.11
HD Crew Cab SLT	6.6L V8	4WD	60	1.0
HD Crew Cab SLT	6.6L V8	4WD	67	1.11
HD Extended Cab	6.6L V8	RWD	60	1.0
HD Extended Cab	6.6L V8	RWD	67	1.11
HD Extended Cab	6.6L V8	4WD	60	1.0
HD Extended Cab	6.6L V8	4WD	67	1.11
HD Extended Cab SLE	6.6L V8	RWD	60	1.0
HD Extended Cab SLE	6.6L V8	RWD	67	1.11
HD Extended Cab SLE	6.6L V8	4WD	60	1.0
HD Extended Cab SLE	6.6L V8	4WD	67	1.11
HD Extended Cab SLT	6.6L V8	RWD	60	1.0
HD Extended Cab SLT	6.6L V8	RWD	67	1.11
HD Extended Cab SLT	6.6L V8	4WD	60	1.0
HD Extended Cab SLT	6.6L V8	4WD	67	1.11
HD Regular Cab	6.6L V8	RWD	60	1.0
HD Regular Cab	6.6L V8	RWD	67	1.11
HD Regular Cab	6.6L V8	4WD	60	1.0
HD Regular Cab	6.6L V8	4WD	67	1.11
HD Regular Cab SLE	6.6L V8	RWD	60	1.0
HD Regular Cab SLE	6.6L V8	RWD	67	1.11
HD Regular Cab SLE	6.6L V8	4WD	60	1.0
HD Regular Cab SLE	6.6L V8	4WD	67	1.11