Based on data from 232 vehicles, 20,098 fuel-ups and 6,068,548 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.76 with a 0.05 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (17) 5.3L V8 FLEX (154) 6.2L V8 GAS (20) GAS (2) V6 GAS (6) V8 GAS (25) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (15) Crew Cab Pickup (45) Cab & Chassis - Crew Cab (1) Any Submodel Base (12) Denali (15) SLE (83) SLT (85) Other (37)

Below you can see a distribution of the fuel-ups with 424 outliers (2.07%) removed.

Following shows the average MPG of each of the 232 vehicles in the system.

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• Sonoma Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2015 • 63 Fuel-ups

  Property of Sasquatchewan

• 15.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 169 Fuel-ups

  Property of jmb23802

• 16.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2021 • 28 Fuel-ups

  Property of Buildmorediesels

• 17.1 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 830 Fuel-ups

  Property of shuckeba

• 11.2 Avg MPG

• Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 62 Fuel-ups

  Property of Rross

• 16.2 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2020 • 79 Fuel-ups

  Property of mlsthmpsn

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Feb 2021 • 21 Fuel-ups

  Property of Mdunbar1994

• 15.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 194 Fuel-ups

  Property of cbass25

• 13.8 Avg MPG

• GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 198 Fuel-ups

  Property of kwautosales

• 14.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 72 Fuel-ups

  Property of SGwyn

• 15.1 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 430 Fuel-ups

  Property of Larry942

• 15.7 Avg MPG

• GMC Sierra 2014

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed Standard Cab Pickup
  Added Sep 2018 • 140 Fuel-ups

  Property of prixxjohn21

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 32 Fuel-ups

  Property of Srebel92

• 14.2 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2020 • 88 Fuel-ups

  Property of LWConrad

• 15.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 109 Fuel-ups

  Property of Firebird455

• 16.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 102 Fuel-ups

  Property of JoynerFuel

• 17.4 Avg MPG

• 14 Sierra 5.3 4x4

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added May 2019 • 162 Fuel-ups

  Property of DanielAcosta

• 19.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 324 Fuel-ups

  Property of capnmo

• 14.4 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 321 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• George

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2020 • 271 Fuel-ups

  Property of GeorgeParker

• 20.0 Avg MPG

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