Based on data from 254 vehicles, 24,093 fuel-ups and 7,238,746 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.65 with a 0.04 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (19) 5.3L V8 FLEX (168) 6.2L V8 GAS (26) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (16) Crew Cab Pickup (48) Cab & Chassis - Crew Cab (2) Any Submodel Base (15) Denali (19) SLE (92) SLT (92) Other (36)

Below you can see a distribution of the fuel-ups with 1102 outliers (4.37%) removed.

Following shows the average MPG of each of the 254 vehicles in the system.

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• 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

• 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

• 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

  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

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2016 • 21 Fuel-ups

  Property of jimberts

• 14.8 Avg MPG

• Xriva 14Sierra 4WD

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2014 • 79 Fuel-ups

  Property of xriva

• 17.0 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 64 Fuel-ups

  Property of r75075

• 16.2 Avg MPG

• Red GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Nov 2013 • 55 Fuel-ups

  Property of awakelate

• 15.0 Avg MPG

• 2014 GMC Sierra Double Cab 4x4 3.42 gears 5.3L V8

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2014 • 38 Fuel-ups

  Property of ajm11

• 18.2 Avg MPG

• Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Apr 2014 • 117 Fuel-ups

  Property of rufus28

• 17.1 Avg MPG

• Sierra 14

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Aug 2015 • 67 Fuel-ups

  Property of SpartanC

• 19.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 4.3L FLEX V6 Automatic 6 Crew Cab Pickup (4 Door)
  Added Nov 2014 • 40 Fuel-ups

  Property of gbo62280

• 15.2 Avg MPG

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