Specifications Comparison: 2003 GMC Sierra 3500 vs 2010 GMC Sierra 3500

Seating Capacity

Trim	Engine	Seating Capacity
3500 Crew Cab	V8	6
3500 Crew Cab	V8	6
3500 Crew Cab SLE	V8	6
3500 Crew Cab SLE	V8	6
3500 Crew Cab SLT	V8	6
3500 Crew Cab SLT	V8	6
3500 Extended Cab	V8	6
3500 Extended Cab	V8	6
3500 Extended Cab SLE	V8	6
3500 Extended Cab SLE	V8	6
3500 Extended Cab SLT	V8	6
3500 Extended Cab SLT	V8	6
3500 Regular Cab	V8	3
3500 Regular Cab SLE	V8	3

Trim	Engine	Seating Capacity
HD 3500 Crew Cab SLE	6.0L V8	6
HD 3500 Crew Cab SLE	6.0L V8	6
HD 3500 Crew Cab SLT	6.0L V8	5
HD 3500 Crew Cab SLT	6.0L V8	5
HD 3500 Extended Cab SLE	6.0L V8	6
HD 3500 Extended Cab SLE	6.0L V8	6
HD 3500 Extended Cab SLT	6.0L V8	5
HD 3500 Extended Cab SLT	6.0L V8	5
HD 3500 Regular Cab SLE	6.0L V8	3
HD 3500 Regular Cab SLE	6.0L V8	3