Based on data from 91 vehicles, 10,413 fuel-ups and 2,642,054 miles of driving, the 2008 GMC Sierra 2500 HD gets a combined Avg MPG of 14.31 with a 0.06 MPG margin of error.

Any Engine Type 6.0L V8 GAS (13) 6.6L V8 DIESEL (60) V8 DIESEL (9) V8 GAS (8) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (4) Crew Cab Pickup (19) Extended Crew Cab Pickup (2) Any Submodel WT (8) SLE (30) SLT (36) Other (17)

Below you can see a distribution of the fuel-ups with 470 outliers (4.32%) removed.

Following shows the average MPG of each of the 91 vehicles in the system.

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• 2008 GMC Sierra

  2008 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Jun 2020 • 147 Fuel-ups

  Property of 17BabyMax

• 12.3 Avg MPG

• GMC Sierra Kenneth

  2008 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup
  Added Mar 2017 • 28 Fuel-ups

  Property of duhlink

• 14.1 Avg MPG

• My Sierra 2500 HD

  2008 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2017 • 13 Fuel-ups

  Property of laner045

• 12.9 Avg MPG

• My Sierra 2500 HD

  2008 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Apr 2017 • 7 Fuel-ups

  Property of korbyn

• 10.5 Avg MPG

• My Sierra 2500 HD

  2008 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 6 Speed
  Added Dec 2016 • 10 Fuel-ups

  Property of revoracer

• 9.8 Avg MPG

• 2008 GMC Sierra

  2008 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 750 Fuel-ups

  Property of crjones

• 14.4 Avg MPG

• My Sierra 2500 HD

  2008 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 6 Speed
  Added Oct 2016 • 8 Fuel-ups

  Property of AJH11

• 15.7 Avg MPG

• GMC 2500

  2008 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 370 Fuel-ups

  Property of brizgislawrencej

• 15.8 Avg MPG

• Sierra

  2008 GMC Sierra 2500 HD WT 6.0L V8 GAS Automatic 6 Speed
  Added Oct 2016 • 3 Fuel-ups

  Property of slanted

• 18.9 Avg MPG

• Josh truck

  2008 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Aug 2016 • 460 Fuel-ups

  Property of fox454

• 16.0 Avg MPG

• My Sierra 2500 HD

  2008 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Mar 2016 • 4 Fuel-ups

  Property of dzimbric

• 18.0 Avg MPG

• Truck

  2008 GMC Sierra 2500 HD SLE 6.0L V8 GAS Automatic 6 Speed Extended Crew Cab Pickup
  Added Feb 2016 • 10 Fuel-ups

  Property of Cruiser60

• 12.7 Avg MPG

• My Sierra 2500 HD

  2008 GMC Sierra 2500 HD SLE 6.6L V8 DIESEL Automatic 6 Speed
  Added Jan 2016 • 9 Fuel-ups

  Property of Hazmat956

• 14.6 Avg MPG

• hunter

  2008 GMC Sierra 2500 HD SLE 6.6L DIESEL V8 Automatic 6 Cab & Chassis (4 Door)
  Added Nov 2014 • 60 Fuel-ups

  Property of mernka1

• 14.1 Avg MPG

• Our GMC 4x4

  2008 GMC Sierra 2500 HD GAS V8
  Added Dec 2012 • 50 Fuel-ups

  Property of MountainPeople

• 11.2 Avg MPG

• daily driver

  2008 GMC Sierra 2500 HD SLT 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Sep 2014 • 8 Fuel-ups

  Property of mrbones

• 18.4 Avg MPG

• Duramax

  2008 GMC Sierra 2500 HD SLT 6.6L DIESEL V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Nov 2014 • 12 Fuel-ups

  Property of kylereuter

• 14.5 Avg MPG

• 08 DMAX

  2008 GMC Sierra 2500 HD SLT 6.6L V8 DIESEL Automatic 6 Speed
  Added Sep 2016 • 263 Fuel-ups

  Property of Nater454

• 18.6 Avg MPG

• Hi ho Silver

  2008 GMC Sierra 2500 HD GAS V8
  Added Jan 2014 • 34 Fuel-ups

  Property of Otteaux

• 13.9 Avg MPG

• GMC 2500 HD

  2008 GMC Sierra 2500 HD GAS V8
  Added Jan 2011 • 102 Fuel-ups

  Property of mrbrianfm

• 12.7 Avg MPG

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