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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• Big truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2021 • 6 Fuel-ups

  Property of stevenmags

• 13.4 Avg MPG

• 2014 GMC

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2017 • 474 Fuel-ups

  Property of ahartman

• 15.7 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 15 Fuel-ups

  Property of jurbin

• 17.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Mar 2019 • 69 Fuel-ups

  Property of joeprice2601

• 15.8 Avg MPG

• Mi Troka

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 3 Fuel-ups

  Property of sanchezcivic

• 13.9 Avg MPG

• 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

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