Based on data from 20 vehicles, 2,077 fuel-ups and 616,807 miles of driving, the 2014 GMC Sierra gets a combined Avg MPG of 16.37 with a 0.13 MPG margin of error.

Any Engine Type 5.3L V8 GAS (18) 6.2L V8 GAS (1) Any Body Style Any Submodel Denali (1) All Terrain (1) SLE (6) SLT (11) Other (1)

Below you can see a distribution of the fuel-ups with 141 outliers (6.36%) removed.

Following shows the average MPG of each of the 20 vehicles in the system.

• Paul

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Feb 2018 • 215 Fuel-ups

  Property of paawwlwall

• 15.6 Avg MPG

• GMC Truck

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2017 • 217 Fuel-ups

  Property of 3garretts

• 17.8 Avg MPG

• Terrain

  2014 GMC Sierra Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 118 Fuel-ups

  Property of Lisa_Robert

• 21.6 Avg MPG

• GMC

  2014 GMC Sierra
  Added Aug 2016 • 101 Fuel-ups

  Property of mulhern00

• 14.8 Avg MPG

• Black Beast

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2017 • 84 Fuel-ups

  Property of traviswatson

• 16.7 Avg MPG

• 2014 Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 141 Fuel-ups

  Property of blakeslee

• 17.1 Avg MPG

• Great White

  2014 GMC Sierra All Terrain 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2017 • 68 Fuel-ups

  Property of jamesb83

• 15.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 126 Fuel-ups

  Property of tanker57

• 15.1 Avg MPG

• TRUCK

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 127 Fuel-ups

  Property of ryfletch

• 16.9 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Aug 2016 • 93 Fuel-ups

  Property of amacvane52

• 18.0 Avg MPG

• Delilah

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2018 • 109 Fuel-ups

  Property of ajkenady

• 19.3 Avg MPG

• Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2016 • 149 Fuel-ups

  Property of jonestw

• 13.3 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 71 Fuel-ups

  Property of datahold

• 15.7 Avg MPG

• 2014 Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 29 Fuel-ups

  Property of Flatchevy

• 18.3 Avg MPG

• GMC Sierra

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Nov 2016 • 319 Fuel-ups

  Property of rickwhaas

• 17.2 Avg MPG

• 2014Sierra

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Dec 2016 • 21 Fuel-ups

  Property of robert80

• 16.7 Avg MPG

• Jeff's Truck

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2017 • 179 Fuel-ups

  Property of Nollboy

• 15.4 Avg MPG

• 2014 Sierra Double Cab SLT

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Aug 2016 • 93 Fuel-ups

  Property of zorrosr

• 16.7 Avg MPG

• Sierra

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2018 • 86 Fuel-ups

  Property of gfervin

• 15.1 Avg MPG

• Sierra 2014-2015

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 38 Fuel-ups

  Property of tanker57

• 15.6 Avg MPG