Based on data from 249 vehicles, 23,836 fuel-ups and 7,133,160 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 (19) 5.3L V8 FLEX (164) 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 (45) Cab & Chassis - Crew Cab (2) Any Submodel Base (14) Denali (19) SLE (90) SLT (90) Other (36)

Below you can see a distribution of the fuel-ups with 496 outliers (2.04%) removed.

Following shows the average MPG of each of the 249 vehicles in the system.

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• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Aug 2015 • 5 Fuel-ups

  Property of BushX

• 18.3 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 30 Fuel-ups

  Property of chad418

• 14.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Aug 2015 • 3 Fuel-ups

  Property of evanski9

• 20.1 Avg MPG

• My Truck

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Extended Cab Pickup (4 Door)
  Added Nov 2014 • 48 Fuel-ups

  Property of akiyonaga

• 16.6 Avg MPG

• ole white

  2014 GMC Sierra 1500 4.3L FLEX V6 Automatic 6 Extended Cab Pickup (4 Door)
  Added Jul 2014 • 31 Fuel-ups

  Property of jeremywpiforester

• 17.9 Avg MPG

• Pimp Truck

  2014 GMC Sierra 1500 SLT Automatic 6
  Added Feb 2014 • 74 Fuel-ups

  Property of Offspring22

• 14.7 Avg MPG

• Blue Big

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6
  Added Jul 2014 • 12 Fuel-ups

  Property of jkcampin

• 12.8 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Nov 2014 • 40 Fuel-ups

  Property of Doobs41378

• 15.7 Avg MPG

• 2014 GMC Sierra Crew Cab Short Box

  2014 GMC Sierra 1500 SLE 4.3L FLEX V6 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2014 • 64 Fuel-ups

  Property of AWDAudi

• 19.5 Avg MPG

• Mack GMC

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Apr 2017 • 3 Fuel-ups

  Property of mackmjr

• 15.3 Avg MPG

• truck

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Mar 2015 • 8 Fuel-ups

  Property of cajun_duck

• 17.3 Avg MPG

• atgmc

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added May 2015 • 5 Fuel-ups

  Property of atgmc

• 3.2 Avg MPG

• Truck

  2014 GMC Sierra 1500
  Added Mar 2014 • 53 Fuel-ups

  Property of Hilde05

• 17.3 Avg MPG

• Greyie

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 28 Fuel-ups

  Property of Freddyolmos04

• 16.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 4.3L FLEX V6 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2015 • 20 Fuel-ups

  Property of david76

• 17.6 Avg MPG

• 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

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