Based on data from 367 vehicles, 23,937 fuel-ups and 7,162,409 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

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 1 Fuel-up

  Property of Northwest

• 0.0 Avg MPG

• truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added May 2015 • 99 Fuel-ups

  Property of marchioa

• 12.7 Avg MPG

• Sierra

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 101 Fuel-ups

  Property of wildman22john

• 15.4 Avg MPG

• Sierra 14

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 204 Fuel-ups

  Property of munterhitch

• 18.1 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Aug 2014 • 56 Fuel-ups

  Property of britsdaddy

• 17.2 Avg MPG

• Jeremy

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Mar 2017 • No Fuel-ups

  Property of jtatguitarist

• 0.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Nov 2016 • 104 Fuel-ups

  Property of fuellydd

• 16.6 Avg MPG

• Bronze Beast

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2014 • 43 Fuel-ups

  Property of silverspaceship

• 17.2 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2013 • 86 Fuel-ups

  Property of geektoad

• 17.3 Avg MPG

• My 6.2 Powered Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Dec 2014 • 76 Fuel-ups

  Property of mudeater

• 14.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Aug 2016 • 1 Fuel-up

  Property of zane14

• 0.0 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jul 2013 • 80 Fuel-ups

  Property of bgilly

• 16.2 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2015 • 2 Fuel-ups

  Property of canelo

• 24.5 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2016 • 1 Fuel-up

  Property of DWJ7

• 0.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jul 2016 • 3 Fuel-ups

  Property of barrybama

• 11.6 Avg MPG

• 2014 Sierra All Terrain Z71

  2014 GMC Sierra 1500 GAS V8
  Added Oct 2013 • 102 Fuel-ups

  Property of Fondupot

• 16.3 Avg MPG

• 2014 GMC

  2014 GMC Sierra 1500 GAS
  Added Feb 2014 • 82 Fuel-ups

  Property of dtratch

• 16.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2016 • 7 Fuel-ups

  Property of jdr78569

• 17.2 Avg MPG

• 2014 SIERRA

  2014 GMC Sierra 1500 SLE Automatic 6 Speed
  Added Dec 2018 • 103 Fuel-ups

  Property of wdclark

• 19.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jul 2014 • 80 Fuel-ups

  Property of YEGrolo

• 13.9 Avg MPG

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