Based on data from 239 vehicles, 21,695 fuel-ups and 6,506,151 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.70 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (19) 5.3L V8 FLEX (158) 6.2L V8 GAS (22) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (14) Crew Cab Pickup (45) Cab & Chassis - Crew Cab (1) Any Submodel Base (13) Denali (16) SLT (86) SLE (88) Other (36)

Below you can see a distribution of the fuel-ups with 444 outliers (2.01%) removed.

Following shows the average MPG of each of the 239 vehicles in the system.

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• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 218 Fuel-ups

  Property of jayner86

• 11.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Feb 2021 • 60 Fuel-ups

  Property of Mdunbar1994

• 15.3 Avg MPG

• Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added May 2021 • 11 Fuel-ups

  Property of Dushang

• 11.6 Avg MPG

• 2014 - Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 124 Fuel-ups

  Property of CNCGUY

• 14.9 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 365 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 245 Fuel-ups

  Property of kwautosales

• 13.8 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 485 Fuel-ups

  Property of Larry942

• 15.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 67 Fuel-ups

  Property of Srebel92

• 13.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2021 • 68 Fuel-ups

  Property of Buildmorediesels

• 16.8 Avg MPG

• The Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 162 Fuel-ups

  Property of coreyrink

• 17.2 Avg MPG

• Sonoma Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2015 • 71 Fuel-ups

  Property of Sasquatchewan

• 15.2 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2020 • 107 Fuel-ups

  Property of LWConrad

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2022 • 4 Fuel-ups

  Property of philwanders

• 14.6 Avg MPG

• Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 67 Fuel-ups

  Property of Rross

• 16.2 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 199 Fuel-ups

  Property of Muldo

• 15.0 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2017 • 264 Fuel-ups

  Property of gobluefrasier

• 16.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Mar 2022 • 5 Fuel-ups

  Property of dodgewal

• 14.8 Avg MPG

• GMC Sierra 2014

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2021 • 10 Fuel-ups

  Property of hcmo

• 12.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2021 • 4 Fuel-ups

  Property of curwinagain

• 17.0 Avg MPG

• Big truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2021 • 6 Fuel-ups

  Property of stevenmags

• 13.4 Avg MPG

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