Based on data from 23 vehicles, 2,387 fuel-ups and 711,880 miles of driving, the 2014 GMC Sierra gets a combined Avg MPG of 16.33 with a 0.12 MPG margin of error.

Any Engine Type 5.3L V8 GAS (21) 6.2L V8 GAS (1) Any Body Style Any Submodel Denali (1) All Terrain (1) SLE (7) SLT (13) Other (1)

Below you can see a distribution of the fuel-ups with 160 outliers (6.28%) removed.

Following shows the average MPG of each of the 23 vehicles in the system.

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• Roy's Truck

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Jun 2018 • 119 Fuel-ups

  Property of RFanning

• 17.8 Avg MPG

• Black Beast

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2017 • 100 Fuel-ups

  Property of traviswatson

• 16.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 154 Fuel-ups

  Property of tanker57

• 15.2 Avg MPG

• My Sierra

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 3 Fuel-ups

  Property of StBandal

• 14.6 Avg MPG

• Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Oct 2016 • 174 Fuel-ups

  Property of jonestw

• 13.2 Avg MPG

• Delilah

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2018 • 121 Fuel-ups

  Property of ajkenady

• 19.0 Avg MPG

• TRUCK

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 135 Fuel-ups

  Property of ryfletch

• 16.9 Avg MPG

• Great White

  2014 GMC Sierra All Terrain 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2017 • 93 Fuel-ups

  Property of jamesb83

• 15.8 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Aug 2016 • 106 Fuel-ups

  Property of amacvane52

• 18.0 Avg MPG

• Paul

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Feb 2018 • 267 Fuel-ups

  Property of paawwlwall

• 15.0 Avg MPG

• GMC Truck

  2014 GMC Sierra SLE 5.3L V8 GAS Automatic 6 Speed
  Added Mar 2017 • 237 Fuel-ups

  Property of 3garretts

• 17.7 Avg MPG

• GMC

  2014 GMC Sierra
  Added Aug 2016 • 107 Fuel-ups

  Property of mulhern00

• 14.8 Avg MPG

• My Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Jun 2018 • 4 Fuel-ups

  Property of miltyme

• 14.8 Avg MPG

• 2014 Sierra

  2014 GMC Sierra SLT 5.3L V8 GAS Automatic 6 Speed
  Added Sep 2016 • 156 Fuel-ups

  Property of blakeslee

• 17.1 Avg MPG

• Terrain

  2014 GMC Sierra Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 129 Fuel-ups

  Property of Lisa_Robert

• 21.7 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

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