Based on data from 82 vehicles, 6,343 fuel-ups and 1,521,505 miles of driving, the 2005 GMC Sierra 2500 HD gets a combined Avg MPG of 13.10 with a 0.09 MPG margin of error.

Any Engine Type 6.0L V8 CNG (4) 6.0L V8 GAS (19) 6.6L V8 DIESEL (49) GAS (1) V8 DIESEL (3) V8 GAS (2) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (5) Crew Cab Pickup (13) Any Submodel WT (3) Base (4) SLE (25) SLT (43) Other (7)

Below you can see a distribution of the fuel-ups with 114 outliers (1.77%) removed.

Following shows the average MPG of each of the 82 vehicles in the system.

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• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Nov 2018 • 157 Fuel-ups

  Property of evanmoore

• 15.2 Avg MPG

• Pete’s Truck

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Oct 2023 • 75 Fuel-ups

  Property of Knightrider666

• 14.7 Avg MPG

• 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed Crew Cab Pickup
  Added Sep 2016 • 968 Fuel-ups

  Property of Davidsi21

• 11.1 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 5 Speed
  Added Dec 2024 • 13 Fuel-ups

  Property of sigmasigmaonthewall

• 8.8 Avg MPG

• GMC Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Jan 2023 • 39 Fuel-ups

  Property of BVDZ

• 9.9 Avg MPG

• Shelly

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 4 Speed Crew Cab Pickup
  Added Feb 2025 • 40 Fuel-ups

  Property of fbzack

• 15.8 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.0L V8 CNG Automatic 4 Speed
  Added Nov 2019 • 493 Fuel-ups

  Property of 2005redlly

• 14.3 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Jul 2024 • 8 Fuel-ups

  Property of jimmyessbee

• 10.8 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added Jul 2023 • 4 Fuel-ups

  Property of FromHere

• 2.5 Avg MPG

• Max

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Aug 2020 • 50 Fuel-ups

  Property of WilderFatBoy

• 13.5 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Jan 2023 • 18 Fuel-ups

  Property of azevedofam

• 14.6 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added May 2023 • 115 Fuel-ups

  Property of tman23

• 14.6 Avg MPG

• GMC Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.0L V8 GAS Automatic 4 Speed
  Added Aug 2024 • 46 Fuel-ups

  Property of tenmile

• 9.0 Avg MPG

• Casey’s GMC 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added May 2022 • 18 Fuel-ups

  Property of Warmerdam

• 12.1 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Apr 2024 • 15 Fuel-ups

  Property of dmaxnick

• 19.5 Avg MPG

• Gmc

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Jul 2017 • 92 Fuel-ups

  Property of bmctier

• 16.1 Avg MPG

• Big Jimmy

  2005 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed Extended Cab Pickup
  Added Dec 2020 • 27 Fuel-ups

  Property of Nvridgerunners

• 11.0 Avg MPG

• 2005 GMC 2500HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Mar 2017 • 408 Fuel-ups

  Property of Shkbilly

• 14.6 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Feb 2016 • 236 Fuel-ups

  Property of kdhanson

• 15.2 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.0L V8 CNG Automatic 4 Speed
  Added Feb 2022 • 89 Fuel-ups

  Property of bow58

• 10.8 Avg MPG

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