Based on data from 72 vehicles, 6,434 fuel-ups and 1,636,274 miles of driving, the 2004 GMC Sierra 2500 HD gets a combined Avg MPG of 13.20 with a 0.12 MPG margin of error.

Any Engine Type 6.0L V8 CNG (3) 6.0L V8 GAS (16) 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 (11) Any Submodel WT (1) Base (7) SLE (23) SLT (34) Other (7)

Below you can see a distribution of the fuel-ups with 36 outliers (0.56%) removed.

Following shows the average MPG of each of the 72 vehicles in the system.

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• GMC Sierra 2500 HD 2004

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 4 Speed
  Added Jun 2021 • 47 Fuel-ups

  Property of ScooterMann

• 16.0 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.0L V8 CNG Automatic 4 Speed
  Added Apr 2022 • 38 Fuel-ups

  Property of terrykaas

• 11.6 Avg MPG

• Diesel

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Oct 2017 • 495 Fuel-ups

  Property of Jdethington

• 16.7 Avg MPG

• Douglas

  2004 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 5 Speed
  Added Oct 2022 • 26 Fuel-ups

  Property of Dankin56

• 10.7 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Nov 2022 • 87 Fuel-ups

  Property of robert5308

• 14.7 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Oct 2022 • 24 Fuel-ups

  Property of krog33

• 13.1 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Manual 5 Speed
  Added Jan 2020 • 33 Fuel-ups

  Property of KyleValente

• 12.7 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2022 • 17 Fuel-ups

  Property of sarwagwin

• 12.5 Avg MPG

• GMC

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2016 • 354 Fuel-ups

  Property of Ricky3b4

• 15.0 Avg MPG

• Black Beauty

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 4 Speed
  Added Sep 2018 • 145 Fuel-ups

  Property of SVTparzybok

• 11.4 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Apr 2022 • 32 Fuel-ups

  Property of ilind15

• 15.3 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 4 Speed
  Added Aug 2022 • 4 Fuel-ups

  Property of Cross-42

• 9.8 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added Mar 2023 • 36 Fuel-ups

  Property of jarjimmy

• 9.0 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Apr 2021 • 231 Fuel-ups

  Property of josamdahl

• 14.4 Avg MPG

• Gmc Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Jun 2018 • 6 Fuel-ups

  Property of louy

• 11.5 Avg MPG

• The truck

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Oct 2022 • 14 Fuel-ups

  Property of mazer15

• 12.8 Avg MPG

• GMC Sierra

  2004 GMC Sierra 2500 HD SLE 6.0L V8 CNG Automatic 4 Speed
  Added Jun 2018 • 9 Fuel-ups

  Property of OldDesertLizard

• 10.0 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Mar 2022 • 18 Fuel-ups

  Property of MrMJ

• 16.8 Avg MPG

• 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

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