Based on data from 367 vehicles, 23,949 fuel-ups and 7,164,979 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.62 with a 0.04 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (26) 5.3L V8 FLEX (245) 6.2L V8 GAS (30) GAS (4) V6 GAS (6) V8 GAS (39) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (21) Crew Cab Pickup (60) Cab & Chassis - Crew Cab (2) Cab & Chassis - Extended Cab (1) Any Submodel Base (19) Denali (25) SLE (133) SLT (133) Other (57)

Below you can see a distribution of the fuel-ups with 497 outliers (2.03%) removed.

Following shows the average MPG of each of the 367 vehicles in the system.

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• GMC Sierra

  2014 GMC Sierra 1500 GAS
  Added Sep 2013 • 1 Fuel-up

  Property of beckchristopher

• 15.5 Avg MPG

• 2006 GMC Sierra SLT 4wd

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2016 • 55 Fuel-ups

  Property of zorrosr

• 13.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2019 • No Fuel-ups

  Property of jcnlns79

• 0.0 Avg MPG

• Lilly

  2014 GMC Sierra 1500
  Added Apr 2014 • No Fuel-ups

  Property of TheSilverback

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2018 • No Fuel-ups

  Property of Nickot

• 0.0 Avg MPG

• Optimus Prime

  2014 GMC Sierra 1500 GAS V8
  Added May 2014 • No Fuel-ups

  Property of goonin46

• 0.0 Avg MPG

• audioi 4x4 5.3

  2014 GMC Sierra 1500
  Added Mar 2014 • No Fuel-ups

  Property of Audioi

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2023 • No Fuel-ups

  Property of jlewellen98

• 0.0 Avg MPG

• LIFTED ALL-TERRAIN

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • No Fuel-ups

  Property of ASTAR

• 0.0 Avg MPG

• Truck

  2014 GMC Sierra 1500 GAS V8
  Added Feb 2014 • No Fuel-ups

  Property of gaines15

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Mar 2020 • No Fuel-ups

  Property of bragg4282

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2020 • No Fuel-ups

  Property of colepepp

• 0.0 Avg MPG

• Sierra - All Terrain

  2014 GMC Sierra 1500 GAS V8
  Added Jun 2014 • No Fuel-ups

  Property of ABarner

• 0.0 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2017 • No Fuel-ups

  Property of J6152

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2016 • No Fuel-ups

  Property of NateC

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Crew Cab Pickup (4 Door)
  Added Jul 2015 • No Fuel-ups

  Property of chrislim

• 0.0 Avg MPG

• ToxicSierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • No Fuel-ups

  Property of fewster101

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2020 • No Fuel-ups

  Property of Spencer6653

• 0.0 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Extended Cab
  Added Jun 2022 • No Fuel-ups

  Property of ktrout001

• 0.0 Avg MPG

• Nicole

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Extended Cab Pickup (4 Door)
  Added Aug 2014 • No Fuel-ups

  Property of sduconn

• 0.0 Avg MPG

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