Based on data from 249 vehicles, 23,858 fuel-ups and 7,139,107 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 497 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 Speed
  Added Apr 2021 • 13 Fuel-ups

  Property of gtm

• 16.8 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 221 Fuel-ups

  Property of jmgolden1978

• 17.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2019 • 36 Fuel-ups

  Property of costajo62

• 15.0 Avg MPG

• Pooh's 2014 Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Jun 2017 • 417 Fuel-ups

  Property of Winpooh

• 16.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Apr 2020 • 18 Fuel-ups

  Property of wellllls

• 17.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2018 • 65 Fuel-ups

  Property of eddymatthews

• 14.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2019 • 125 Fuel-ups

  Property of brentwilli100

• 17.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2020 • 5 Fuel-ups

  Property of jhclay03

• 13.6 Avg MPG

• 2014 Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2019 • 65 Fuel-ups

  Property of soharo

• 15.3 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Nov 2014 • 270 Fuel-ups

  Property of vortec42

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 33 Fuel-ups

  Property of jp82

• 12.9 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 169 Fuel-ups

  Property of zuburger

• 12.5 Avg MPG

• 2014 Denali

  2014 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 6 Speed
  Added May 2018 • 36 Fuel-ups

  Property of 2003-SSEi

• 12.9 Avg MPG

• Tilsen GMC

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 596 Fuel-ups

  Property of astaver

• 16.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2016 • 136 Fuel-ups

  Property of plumbrokeacres

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 129 Fuel-ups

  Property of rj21

• 12.4 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2019 • 46 Fuel-ups

  Property of fuss310

• 18.0 Avg MPG

• GMC Sierra SLE

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 140 Fuel-ups

  Property of kellswo

• 16.4 Avg MPG

• 2014 Sierra 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Feb 2014 • 189 Fuel-ups

  Property of TXRanger

• 16.1 Avg MPG

• Clifford 5.0

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Dec 2013 • 159 Fuel-ups

  Property of papcie03

• 16.8 Avg MPG

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