Specifications Comparison: 2015 GMC Sierra 3500 vs 2018 GMC Sierra 3500

Gas Tank Size

Trim	Eng.	Drive train	Fuel Tank Size (Gal)	Fuel Tank Size (L)
HD 3500 Crew Cab Denali	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab Denali	6.0L V8	4WD	36.0	136.3
HD 3500 Crew Cab SLE	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab SLE	6.0L V8	4WD	36.0	136.3
HD 3500 Crew Cab SLT	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab SLT	6.0L V8	4WD	36.0	136.3
HD 3500 Crew Cab Work	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab Work	6.0L V8	4WD	36.0	136.3
HD 3500 Extended Cab SLE	6.0L V8	RWD	36.0	136.3
HD 3500 Extended Cab SLE	6.0L V8	4WD	36.0	136.3
HD 3500 Extended Cab SLT	6.0L V8	RWD	36.0	136.3
HD 3500 Extended Cab SLT	6.0L V8	4WD	36.0	136.3
HD 3500 Extended Cab Work	6.0L V8	RWD	36.0	136.3
HD 3500 Extended Cab Work	6.0L V8	4WD	36.0	136.3
HD 3500 Regular Cab SLE	6.0L V8	RWD	36.0	136.3
HD 3500 Regular Cab SLE	6.0L V8	4WD	36.0	136.3
HD 3500 Regular Cab Work	6.0L V8	RWD	36.0	136.3
HD 3500 Regular Cab Work	6.0L V8	4WD	36.0	136.3

Trim	Eng.	Drive train	Fuel Tank Size (Gal)	Fuel Tank Size (L)
HD 3500 Crew Cab	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab	6.0L V8	4WD	36.0	136.3
HD 3500 Crew Cab Denali	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab Denali	6.0L V8	4WD	36.0	136.3
HD 3500 Crew Cab SLE	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab SLE	6.0L V8	4WD	36.0	136.3
HD 3500 Crew Cab SLT	6.0L V8	RWD	36.0	136.3
HD 3500 Crew Cab SLT	6.0L V8	4WD	36.0	136.3
HD 3500 Extended Cab	6.0L V8	RWD	36.0	136.3
HD 3500 Extended Cab	6.0L V8	4WD	36.0	136.3
HD 3500 Extended Cab SLE	6.0L V8	RWD	36.0	136.3
HD 3500 Extended Cab SLE	6.0L V8	4WD	36.0	136.3
HD 3500 Extended Cab SLT	6.0L V8	RWD	36.0	136.3
HD 3500 Regular Cab	6.0L V8	RWD	36.0	136.3
HD 3500 Regular Cab	6.0L V8	4WD	36.0	136.3
HD 3500 Regular Cab SLE	6.0L V8	RWD	36.0	136.3
HD 3500 Regular Cab SLE	6.0L V8	4WD	36.0	136.3