Based on data from 19 vehicles, 3,309 fuel-ups and 892,542 miles of driving, the 2009 GMC Sierra gets a combined Avg MPG of 14.34 with a 0.11 MPG margin of error.

Any Engine Type 5.3L V8 GAS (13) 6.2L V8 FLEX (1) 6.2L V8 GAS (1) Any Body Style Crew Cab Pickup (2) Any Submodel Denali (2) Base (13) Other (4)

Below you can see a distribution of the fuel-ups with 39 outliers (1.16%) removed.

Following shows the average MPG of each of the 19 vehicles in the system.

• 2009 gmc truck

  2009 GMC Sierra LSE
  Added Mar 2020 • 1271 Fuel-ups

  Property of WillyM

• 13.9 Avg MPG

• Z-71

  2009 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
  Added Aug 2016 • 199 Fuel-ups

  Property of brannonthomas

• 15.7 Avg MPG

• Sierra

  2009 GMC Sierra SLT
  Added Sep 2016 • 347 Fuel-ups

  Property of RDoty2016

• 13.8 Avg MPG

• Denali

  2009 GMC Sierra Denali 6.2L V8 FLEX Automatic 6 Speed
  Added Jan 2018 • 226 Fuel-ups

  Property of fuellyboy

• 13.9 Avg MPG

• GMC Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 7 Fuel-ups

  Property of hacota

• 14.5 Avg MPG

• GMC Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 4 Speed
  Added Nov 2019 • 314 Fuel-ups

  Property of broshnoc

• 15.7 Avg MPG

• GMC Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2016 • 341 Fuel-ups

  Property of walsh_guy

• 13.1 Avg MPG

• Truck

  2009 GMC Sierra 5.3L V8 GAS Automatic 4 Speed Crew Cab Pickup
  Added Sep 2017 • 60 Fuel-ups

  Property of revoman

• 14.4 Avg MPG

• My Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 30 Fuel-ups

  Property of Doncb

• 14.1 Avg MPG

• Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2018 • 40 Fuel-ups

  Property of jaypit

• 17.4 Avg MPG

• Sierra

  2009 GMC Sierra Work truck
  Added Mar 2017 • 348 Fuel-ups

  Property of Fuelcard

• 19.4 Avg MPG

• GMC Sierra

  2009 GMC Sierra SLE
  Added Mar 2017 • 196 Fuel-ups

  Property of BRock812

• 14.3 Avg MPG

• Denali

  2009 GMC Sierra Denali 6.2L V8 GAS Automatic 6 Speed
  Added May 2018 • 131 Fuel-ups

  Property of fuellyboy

• 14.9 Avg MPG

• 2009 Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 42 Fuel-ups

  Property of webhoughton440

• 14.4 Avg MPG

• Truck

  2009 GMC Sierra 5.3L V8 GAS Automatic 4 Speed
  Added Sep 2016 • 4 Fuel-ups

  Property of Ajchiamardas

• 14.6 Avg MPG

• My Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 6 Speed
  Added Jun 2016 • 4 Fuel-ups

  Property of canadian92

• 22.1 Avg MPG

• My Sierra

  2009 GMC Sierra 5.3L V8 GAS Automatic 4 Speed
  Added Jan 2016 • 6 Fuel-ups

  Property of wvanderson

• 15.8 Avg MPG

• Pickup

  2009 GMC Sierra 5.3L V8 GAS Automatic 4 Speed
  Added Aug 2016 • 7 Fuel-ups

  Property of tsmember

• 11.9 Avg MPG

• Execu-Truck

  2009 GMC Sierra 5.3L V8 GAS Crew Cab Pickup
  Added Oct 2017 • 35 Fuel-ups

  Property of Arkitct

• 14.4 Avg MPG