Based on data from 75 vehicles, 6,734 fuel-ups and 1,700,398 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 (45) 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 (25) 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 75 vehicles in the system.

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• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Mar 2022 • 50 Fuel-ups

  Property of MrMJ

• 16.2 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Manual 5 Speed
  Added Jan 2020 • 39 Fuel-ups

  Property of KyleValente

• 13.0 Avg MPG

• Ray's GMC Sierra 2500HD

  2004 GMC Sierra 2500 HD 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Aug 2023 • 79 Fuel-ups

  Property of thevoldarian

• 13.4 Avg MPG

• GMC

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2016 • 377 Fuel-ups

  Property of Ricky3b4

• 14.9 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Dec 2024 • 10 Fuel-ups

  Property of jfalcon1

• 17.9 Avg MPG

• Diesel

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Oct 2017 • 551 Fuel-ups

  Property of Jdethington

• 16.6 Avg MPG

• Red Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Nov 2024 • 3 Fuel-ups

  Property of MRFUNN1

• 9.9 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.0L V8 CNG Automatic 4 Speed
  Added Apr 2022 • 80 Fuel-ups

  Property of terrykaas

• 12.0 Avg MPG

• Sierra

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Feb 2024 • 13 Fuel-ups

  Property of flainn

• 14.0 Avg MPG

• 04 Duramax

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Apr 2021 • 245 Fuel-ups

  Property of josamdahl

• 14.4 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added Mar 2023 • 48 Fuel-ups

  Property of jarjimmy

• 8.8 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2022 • 22 Fuel-ups

  Property of sarwagwin

• 12.0 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Nov 2022 • 118 Fuel-ups

  Property of robert5308

• 15.0 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Oct 2017 • 72 Fuel-ups

  Property of wnhammer

• 13.1 Avg MPG

• Ace

  2004 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added Jul 2024 • 3 Fuel-ups

  Property of Gryn

• 11.6 Avg MPG

• GMC Sierra

  2004 GMC Sierra 2500 HD SLE 6.0L V8 CNG Automatic 4 Speed
  Added Jun 2018 • 11 Fuel-ups

  Property of OldDesertLizard

• 9.6 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Oct 2022 • 74 Fuel-ups

  Property of krog33

• 13.1 Avg MPG

• My Sierra 2500 HD

  2004 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 4 Speed
  Added Aug 2022 • 5 Fuel-ups

  Property of Cross-42

• 19.5 Avg MPG

• Black Beauty

  2004 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 4 Speed
  Added Sep 2018 • 151 Fuel-ups

  Property of SVTparzybok

• 11.3 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

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