Based on data from 101 vehicles, 7,868 fuel-ups and 2,228,402 miles of driving, the 2008 GMC Sierra 1500 gets a combined Avg MPG of 14.12 with a 0.06 MPG margin of error.

Any Engine Type 4.3L V6 GAS (5) 4.8L V8 GAS (18) 5.3L V8 FLEX (20) 5.3L V8 GAS (27) 6.0L V8 GAS (4) 6.2L V8 GAS (5) V6 GAS (2) V8 FLEX (1) V8 GAS (14) Any Body Style Standard Cab Pickup (6) Extended Cab Pickup (4) Crew Cab Pickup (20) Any Submodel Denali (5) WT (10) SL (11) SLT (18) SLE (38) Other (19)

Below you can see a distribution of the fuel-ups with 255 outliers (3.14%) removed.

Following shows the average MPG of each of the 101 vehicles in the system.

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• Work Truck

  2008 GMC Sierra 1500 WT 4.3L V6 GAS Automatic 4 Speed Standard Cab Pickup
  Added Mar 2019 • 249 Fuel-ups

  Property of Frsmithiv

• 15.1 Avg MPG

• My Sierra 1500

  2008 GMC Sierra 1500 SL 4.8L V8 GAS Automatic 4 Speed
  Added Feb 2016 • 290 Fuel-ups

  Property of badmoon692004

• 16.2 Avg MPG

• My Sierra 1500

  2008 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 4 Speed
  Added May 2022 • 6 Fuel-ups

  Property of COM-Mattawa

• 16.0 Avg MPG

• Dad’s Red Truck

  2008 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 4 Speed
  Added Feb 2020 • 107 Fuel-ups

  Property of SonomaCorkDork

• 15.0 Avg MPG

• Brandon Derrick

  2008 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 4 Speed
  Added Mar 2017 • 369 Fuel-ups

  Property of agman01

• 14.9 Avg MPG

• Colin Truck

  2008 GMC Sierra 1500 SLT 6.0L V8 GAS Automatic 4 Speed Extended Cab Pickup
  Added Feb 2018 • 76 Fuel-ups

  Property of colinandcynthia

• 14.5 Avg MPG

• GMC

  2008 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 4 Speed
  Added Mar 2018 • 182 Fuel-ups

  Property of MHogsett

• 16.4 Avg MPG

• GMC

  2008 GMC Sierra 1500 SL 4.8L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Oct 2017 • 83 Fuel-ups

  Property of Chemicalfree

• 16.1 Avg MPG

• Sierra 1500

  2008 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2017 • 89 Fuel-ups

  Property of jordanGutts

• 14.6 Avg MPG

• My Sierra 1500

  2008 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Aug 2017 • 372 Fuel-ups

  Property of kblunt

• 14.6 Avg MPG

• GMC

  2008 GMC Sierra 1500 SL 4.8L V8 GAS Automatic 4 Speed
  Added Nov 2018 • 269 Fuel-ups

  Property of jakirchoff

• 12.7 Avg MPG

• My Sierra 1500

  2008 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Nov 2020 • 52 Fuel-ups

  Property of Yankeeezilla

• 14.6 Avg MPG

• 2008 GMC Truck

  2008 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 4 Speed Crew Cab Pickup
  Added Nov 2018 • 150 Fuel-ups

  Property of IFIXEM2

• 16.2 Avg MPG

• Dads Blu

  2008 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 4 Speed
  Added Aug 2019 • 52 Fuel-ups

  Property of ArsrTech

• 13.5 Avg MPG

• GMC DENAli

  2008 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Mar 2017 • 336 Fuel-ups

  Property of justgas

• 14.2 Avg MPG

• My Sierra 1500

  2008 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Apr 2019 • 185 Fuel-ups

  Property of grantallen

• 11.8 Avg MPG

• Eggplant

  2008 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 4 Speed Crew Cab Pickup
  Added Oct 2020 • 25 Fuel-ups

  Property of JSGunderson

• 12.0 Avg MPG

• My Sierra 1500

  2008 GMC Sierra 1500 WT 5.3L V8 GAS Automatic 4 Speed
  Added Dec 2020 • 28 Fuel-ups

  Property of ace22398

• 14.4 Avg MPG

• Truck

  2008 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 4 Speed
  Added Jul 2014 • 135 Fuel-ups

  Property of MChap15

• 13.8 Avg MPG

• Beater Sierra

  2008 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 4 Speed
  Added Apr 2022 • 3 Fuel-ups

  Property of DubSuburban

• 13.1 Avg MPG

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