Based on data from 95 vehicles, 11,336 fuel-ups and 2,858,560 miles of driving, the 2008 GMC Sierra 2500 HD gets a combined Avg MPG of 14.25 with a 0.06 MPG margin of error.

Any Engine Type 6.0L V8 GAS (15) 6.6L V8 DIESEL (62) V8 DIESEL (9) V8 GAS (8) Any Body Style Standard Cab Pickup (1) Extended Cab Pickup (3) Crew Cab Pickup (19) Extended Crew Cab Pickup (2) Any Submodel WT (8) SLE (31) SLT (39) Other (17)

Below you can see a distribution of the fuel-ups with 506 outliers (4.27%) removed.

Following shows the average MPG of each of the 95 vehicles in the system.

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• 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

• Sessy

  2008 GMC Sierra 2500 HD GAS V8
  Added Feb 2014 • 6 Fuel-ups

  Property of 3unn

• 7.9 Avg MPG

• Duramax

  2008 GMC Sierra 2500 HD DIESEL V8
  Added Apr 2014 • 3 Fuel-ups

  Property of dkwas

• 15.5 Avg MPG

• Truck

  2008 GMC Sierra 2500 HD GAS V8
  Added Oct 2013 • 9 Fuel-ups

  Property of eformo

• 11.7 Avg MPG

• Black BAT

  2008 GMC Sierra 2500 HD DIESEL V8
  Added Dec 2012 • 14 Fuel-ups

  Property of aknightwhosaysNi

• 13.0 Avg MPG

• Black GMC

  2008 GMC Sierra 2500 HD DIESEL V8
  Added May 2012 • 15 Fuel-ups

  Property of jkj

• 14.4 Avg MPG

• DirtyMax

  2008 GMC Sierra 2500 HD DIESEL V8
  Added Jun 2012 • 39 Fuel-ups

  Property of bhall229

• 13.3 Avg MPG

• 08 Dmax

  2008 GMC Sierra 2500 HD DIESEL V8
  Added Sep 2012 • 4 Fuel-ups

  Property of Nater454

• 17.4 Avg MPG

• Brown Beast

  2008 GMC Sierra 2500 HD V8 DIESEL
  Added Oct 2011 • 4 Fuel-ups

  Property of Madtom

• 17.3 Avg MPG

• Tech 655 - 476 0WP

  2008 GMC Sierra 2500 HD GAS V8
  Added Dec 2011 • 13 Fuel-ups

  Property of JonNav

• 13.2 Avg MPG

• Tech 650 - 476 1WP

  2008 GMC Sierra 2500 HD GAS V8
  Added Jan 2012 • 3 Fuel-ups

  Property of JonNav

• 20.8 Avg MPG

• 2500HD

  2008 GMC Sierra 2500 HD GAS V8
  Added Dec 2009 • 7 Fuel-ups

  Property of fredpowell

• 11.7 Avg MPG

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