Specifications Comparison: 2004 GMC Sierra 3500 vs 2023 GMC Sierra 3500

Gas Tank Size

Trim	Eng.	Drive train	Fuel Tank Size (Gal)	Fuel Tank Size (L)
3500 Crew Cab	V8	RWD	34.0	128.7
3500 Crew Cab	V8	4WD	34.0	128.7
3500 Crew Cab SLE	V8	RWD	34.0	128.7
3500 Crew Cab SLE	V8	4WD	34.0	128.7
3500 Crew Cab SLT	V8	RWD	34.0	128.7
3500 Crew Cab SLT	V8	4WD	34.0	128.7
3500 Extended Cab	V8	RWD	34.0	128.7
3500 Extended Cab	V8	4WD	34.0	128.7
3500 Extended Cab SLE	V8	RWD	34.0	128.7
3500 Extended Cab SLE	V8	4WD	34.0	128.7
3500 Extended Cab SLT	V8	RWD	34.0	128.7
3500 Extended Cab SLT	V8	4WD	34.0	128.7
3500 Regular Cab	V8	4WD	34.0	128.7
3500 Regular Cab SLE	V8	4WD	34.0	128.7

Trim	Eng.	Drive train	Fuel Tank Size (Gal)	Fuel Tank Size (L)
HD Pro Crew Cab 159"	6.6L V8	RWD	36.0	136.3
HD Pro Crew Cab 172"	6.6L V8	RWD	36.0	136.3
HD Pro Double Cab 162"	6.6L V8	RWD	36.0	136.3
HD Pro Reg Cab 142"	6.6L V8	RWD	36.0	136.3
HD Pro Crew Cab 159"	6.6L V8	4WD	36.0	136.3
HD Pro Crew Cab 172"	6.6L V8	4WD	36.0	136.3
HD Pro Double Cab 162"	6.6L V8	4WD	36.0	136.3
HD Pro Reg Cab 142"	6.6L V8	4WD	36.0	136.3
HD SLE Crew Cab 159"	6.6L V8	RWD	36.0	136.3
HD SLE Crew Cab 172"	6.6L V8	RWD	36.0	136.3
HD SLE Double Cab 162"	6.6L V8	RWD	36.0	136.3
HD SLE Reg Cab 142"	6.6L V8	RWD	36.0	136.3
HD SLE Crew Cab 159"	6.6L V8	4WD	36.0	136.3
HD SLE Crew Cab 172"	6.6L V8	4WD	36.0	136.3
HD SLE Double Cab 162"	6.6L V8	4WD	36.0	136.3
HD SLE Reg Cab 142"	6.6L V8	4WD	36.0	136.3
HD SLT Crew Cab 159"	6.6L V8	RWD	36.0	136.3
HD SLT Crew Cab 172"	6.6L V8	RWD	36.0	136.3
HD SLT Crew Cab 159"	6.6L V8	4WD	36.0	136.3
HD SLT Crew Cab 172"	6.6L V8	4WD	36.0	136.3
HD AT4 Crew Cab 159"	6.6L V8	4WD	36.0	136.3
HD AT4 Crew Cab 172"	6.6L V8	4WD	36.0	136.3
HD Denali Crew Cab 159"	6.6L V8	4WD	36.0	136.3
HD Denali Crew Cab 172"	6.6L V8	4WD	36.0	136.3