Based on data from 76 vehicles, 5,827 fuel-ups and 1,397,974 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 (15) 6.6L V8 DIESEL (47) GAS (1) V8 DIESEL (3) V8 GAS (2) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (4) Crew Cab Pickup (11) Any Submodel WT (2) Base (4) SLE (24) SLT (39) Other (7)

Below you can see a distribution of the fuel-ups with 105 outliers (1.77%) removed.

Following shows the average MPG of each of the 76 vehicles in the system.

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• Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Aug 2017 • 3 Fuel-ups

  Property of johnnk

• 16.3 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Feb 2019 • 31 Fuel-ups

  Property of kevinfirefox11

• 17.3 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 4 Speed
  Added May 2019 • 3 Fuel-ups

  Property of msturgeon963

• 10.9 Avg MPG

• Truck

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Mar 2016 • 79 Fuel-ups

  Property of dleach7768

• 11.9 Avg MPG

• 05 2500HD Gas

  2005 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 4 Speed
  Added Nov 2021 • 6 Fuel-ups

  Property of JarrettR

• 6.8 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 4 Speed
  Added Aug 2018 • 4 Fuel-ups

  Property of croller

• 10.0 Avg MPG

• 2008 GMC Sierra 2500HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Standard 6 Speed Crew Cab Pickup
  Added Aug 2019 • 251 Fuel-ups

  Property of pputney

• 13.5 Avg MPG

• Caleb Mcbrian

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Jul 2017 • 46 Fuel-ups

  Property of Porky1259

• 18.4 Avg MPG

• 2005 GMC Sierra

  2005 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Sep 2017 • 380 Fuel-ups

  Property of Herrmang

• 12.2 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Sep 2016 • 56 Fuel-ups

  Property of mkivbtr32

• 17.5 Avg MPG

• Dad's truck

  2005 GMC Sierra 2500 HD 6.0L V8 GAS Automatic 4 Speed Extended Cab Pickup
  Added Apr 2018 • 7 Fuel-ups

  Property of lment

• 10.1 Avg MPG

• 2005 GMC Sierra

  2005 GMC Sierra 2500 HD SLT
  Added Jul 2010 • 355 Fuel-ups

  Property of Pray4Snow

• 12.3 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD 6.0L V8 CNG Automatic 4 Speed
  Added Aug 2017 • 19 Fuel-ups

  Property of dcustode

• 9.8 Avg MPG

• 2500HD Diesel

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Mar 2017 • 11 Fuel-ups

  Property of vtduramax

• 11.8 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Jun 2017 • 6 Fuel-ups

  Property of 97Turbo

• 13.5 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Speed
  Added Nov 2016 • 17 Fuel-ups

  Property of straussman

• 15.5 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 5 Speed
  Added Apr 2017 • 7 Fuel-ups

  Property of girlietruck17

• 8.0 Avg MPG

• LLY Duramax

  2005 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 5 Extended Cab Pickup (4 Door)
  Added Jul 2015 • 89 Fuel-ups

  Property of chandler583

• 16.1 Avg MPG

• Damn Diesel

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed Crew Cab Pickup
  Added Dec 2017 • 145 Fuel-ups

  Property of ShowStopper71Z28

• 13.8 Avg MPG

• My Sierra 2500 HD

  2005 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 5 Speed
  Added Oct 2016 • 4 Fuel-ups

  Property of kitchenking

• 11.3 Avg MPG

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