Specifications Comparison: 2018 GMC Sierra 1500 vs 2003 GMC Sierra 1500

Towing Capacity

Trim	Engine	Drive train	Towing Capacity (lbs)
1500 Crew Cab	4.3L V6	RWD	5,500 lbs.
1500 Crew Cab	4.3L V6	4WD	7,000 lbs.
1500 Crew Cab Denali	5.3L V8	RWD	9,300 lbs.
1500 Crew Cab Denali	5.3L V8	4WD	9,100 lbs.
1500 Crew Cab SLE	4.3L V6	RWD	5,500 lbs.
1500 Crew Cab SLE	4.3L V6	4WD	7,000 lbs.
1500 Crew Cab SLT	5.3L V8	RWD	6,400 lbs.
1500 Crew Cab SLT	5.3L V8	4WD	6,100 lbs.
1500 Crew Cab SLT eAssist	5.3L V8	RWD	6,400 lbs.
1500 Crew Cab SLT eAssist	5.3L V8	4WD	6,100 lbs.
1500 Extended Cab	4.3L V6	RWD	5,600 lbs.
1500 Extended Cab	4.3L V6	4WD	7,100 lbs.
1500 Extended Cab SLE	4.3L V6	RWD	5,600 lbs.
1500 Extended Cab SLE	4.3L V6	4WD	7,100 lbs.
1500 Extended Cab SLT	5.3L V8	RWD	6,400 lbs.
1500 Extended Cab SLT	5.3L V8	4WD	6,200 lbs.
1500 Regular Cab	4.3L V6	RWD	6,000 lbs.
1500 Regular Cab	4.3L V6	4WD	7,600 lbs.
1500 Regular Cab SLE	4.3L V6	RWD	6,000 lbs.
1500 Regular Cab SLE	4.3L V6	4WD	7,600 lbs.

Trim	Engine	Drive train	Towing Capacity (lbs)
1500 Extended Cab	V6	RWD	4,700 lbs.
1500 Extended Cab	V8	RWD	6,100 lbs.
1500 Extended Cab SLE	V8	RWD	6,100 lbs.
1500 Extended Cab SLE	V8	4WD	6,800 lbs.
1500 Extended Cab SLT	V8	RWD	6,100 lbs.
1500 Extended Cab SLT	V8	4WD	6,800 lbs.
1500 Regular Cab	V6	RWD	4,000 lbs.
1500 Regular Cab	V8	4WD	7,100 lbs.
1500 Regular Cab SLE	V8	RWD	4,400 lbs.
1500 Regular Cab SLE	V8	4WD	7,100 lbs.
HD 1500 Crew Cab SLE	V8	RWD	8,200 lbs.
HD 1500 Crew Cab SLE	V8	4WD	7,900 lbs.
HD 1500 Crew Cab SLT	V8	RWD	8,200 lbs.
HD 1500 Crew Cab SLT	V8	4WD	7,900 lbs.
Extended Cab Denali	V8	AWD	10,000 lbs.