Based on data from 73 vehicles, 6,667 fuel-ups and 1,685,444 miles of driving, the 2004 GMC Sierra 2500 HD gets a combined Avg MPG of 13.21 with a 0.11 MPG margin of error.

Any Engine Type 6.0L V8 CNG (3) 6.0L V8 GAS (17) 6.6L V8 DIESEL (43) 8.1L V8 GAS (2) V8 DIESEL (3) V8 GAS (2) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (5) Crew Cab Pickup (12) Any Submodel WT (1) Base (8) SLE (23) SLT (34) Other (7)

Below you can see a distribution of the fuel-ups with 37 outliers (0.55%) removed.

Following shows the average MPG of each of the 73 vehicles in the system.

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• Truck1

  2004 GMC Sierra 2500 HD 6.6L V8 DIESEL Automatic 4 Speed Crew Cab Pickup
  Added Oct 2020 • 1058 Fuel-ups

  Property of danpeek

• 16.2 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Jul 2021 • 23 Fuel-ups

  Property of ikote

• 12.2 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Jun 2022 • 7 Fuel-ups

  Property of LBurgett

• 14.0 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jan 2022 • 32 Fuel-ups

  Property of mikechattn

• 11.5 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Dec 2020 • 69 Fuel-ups

  Property of bwricks2000

• 0.6 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 5 Speed
  Added Jul 2022 • 6 Fuel-ups

  Property of nblakeley

• 11.4 Avg MPG

• White Truck

  2004 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Jan 2009 • 246 Fuel-ups

  Property of keith455

• 9.4 Avg MPG

• Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Apr 2020 • 36 Fuel-ups

  Property of taylormerritt

• 14.5 Avg MPG

• Duramax

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Feb 2020 • 146 Fuel-ups

  Property of prestypete

• 14.8 Avg MPG

• Casual 'berta

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed Extended Cab Pickup
  Added Oct 2018 • 91 Fuel-ups

  Property of bookermorgan86

• 11.8 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed
  Added Jan 2018 • 160 Fuel-ups

  Property of farmboy62644

• 10.0 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Oct 2015 • 34 Fuel-ups

  Property of steam548

• 15.7 Avg MPG

• Truck

  2004 GMC Sierra 2500 HD 6.6L V8 DIESEL Automatic 4 Speed Crew Cab Pickup
  Added Oct 2017 • 966 Fuel-ups

  Property of danpeek

• 16.3 Avg MPG

• GMC 2500HD

  2004 GMC Sierra 2500 HD 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2016 • 6 Fuel-ups

  Property of dieseler

• 16.7 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Jan 2020 • 12 Fuel-ups

  Property of wnt2bglfn

• 15.4 Avg MPG

• Tow Rig

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed Extended Cab Pickup
  Added Sep 2011 • 351 Fuel-ups

  Property of spark00

• 14.9 Avg MPG

• Dirtymax

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Mar 2019 • 35 Fuel-ups

  Property of bramer

• 18.7 Avg MPG

• The Beast

  2004 GMC Sierra 2500 HD SLE 8.1L V8 GAS Automatic 5 Speed Crew Cab Pickup
  Added Oct 2017 • 619 Fuel-ups

  Property of tward2242

• 8.2 Avg MPG

• Geddy

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed Extended Cab Pickup
  Added Sep 2019 • 53 Fuel-ups

  Property of WallStreet

• 12.2 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD 6.0L V8 GAS Automatic 5 Speed
  Added May 2020 • 4 Fuel-ups

  Property of zielinskiwerdna

• 11.9 Avg MPG

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