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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• White beast

  2014 GMC Sierra 1500 GAS V8
  Added Feb 2014 • 16 Fuel-ups

  Property of CNDTDI

• 16.9 Avg MPG

• Iridium

  2014 GMC Sierra 1500 4.3L FLEX V6 Automatic 6
  Added Jan 2015 • 9 Fuel-ups

  Property of knite

• 18.3 Avg MPG

• Doublecab 4x4 Sierra 5.3 V8

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6
  Added Mar 2015 • 3 Fuel-ups

  Property of Steilish

• 20.1 Avg MPG

• Sierra All Terrain

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Extended Cab Pickup (4 Door)
  Added Aug 2014 • 21 Fuel-ups

  Property of Werd01

• 15.9 Avg MPG

• GMC Sierra SLE 4x4

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Extended Cab Pickup (4 Door)
  Added Sep 2014 • 26 Fuel-ups

  Property of jhynes70

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Sep 2014 • 21 Fuel-ups

  Property of blazin20z

• 17.1 Avg MPG

• Chris' Sierra

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 8 Fuel-ups

  Property of jcfountain33

• 13.4 Avg MPG

• Truck

  2014 GMC Sierra 1500 GAS V8
  Added May 2014 • 37 Fuel-ups

  Property of cmwilson

• 19.7 Avg MPG

• Sierra 1500 All-Terrain

  2014 GMC Sierra 1500 SLT 6.2L GAS V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 6 Fuel-ups

  Property of R3DRAM

• 15.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Sep 2014 • 8 Fuel-ups

  Property of sundj15

• 16.2 Avg MPG

• den11don's 2014 sierra

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Nov 2014 • 11 Fuel-ups

  Property of den11don

• 17.6 Avg MPG

• Perturabo

  2014 GMC Sierra 1500 GAS V6
  Added Apr 2014 • 35 Fuel-ups

  Property of loadstar81

• 17.5 Avg MPG

• BigBlack

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Sep 2014 • 23 Fuel-ups

  Property of jstapel

• 17.6 Avg MPG

• Sierra Leon

  2014 GMC Sierra 1500 SLE 4.3L FLEX V6 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 15 Fuel-ups

  Property of etmccaus

• 19.1 Avg MPG

• All Terrain

  2014 GMC Sierra 1500 GAS V8
  Added Oct 2013 • 31 Fuel-ups

  Property of deezee

• 13.3 Avg MPG

• truck

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jun 2014 • 47 Fuel-ups

  Property of mudeater

• 15.5 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Extended Cab Pickup (4 Door)
  Added Aug 2014 • 7 Fuel-ups

  Property of RetiredNavyWO

• 18.3 Avg MPG

• Redneck Pimp

  2014 GMC Sierra 1500 Denali 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 17 Fuel-ups

  Property of Nuvolari

• 16.6 Avg MPG

• Sierra

  2014 GMC Sierra 1500 GAS V8
  Added May 2014 • 25 Fuel-ups

  Property of gmjunky

• 15.4 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Extended Cab Pickup (4 Door)
  Added Nov 2014 • 4 Fuel-ups

  Property of 2014Sierra

• 17.1 Avg MPG

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