Based on data from 249 vehicles, 23,859 fuel-ups and 7,139,436 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 Feb 2021 • 216 Fuel-ups

  Property of Firebird455

• 16.8 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 364 Fuel-ups

  Property of azninc13

• 15.3 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE
  Added Sep 2018 • 453 Fuel-ups

  Property of nittany815

• 15.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added May 2022 • 17 Fuel-ups

  Property of livewyre13

• 11.8 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Oct 2022 • 84 Fuel-ups

  Property of COM-Mattawa

• 16.5 Avg MPG

• My Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2023 • 50 Fuel-ups

  Property of jamesg88

• 17.8 Avg MPG

• Sierra 1500 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2020 • 149 Fuel-ups

  Property of srquill

• 15.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 414 Fuel-ups

  Property of capnmo

• 14.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 240 Fuel-ups

  Property of Gott42

• 14.9 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1069 Fuel-ups

  Property of shuckeba

• 11.1 Avg MPG

• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 263 Fuel-ups

  Property of jayner86

• 11.4 Avg MPG

• Sonoma Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2015 • 82 Fuel-ups

  Property of Sasquatchewan

• 15.4 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2022 • 70 Fuel-ups

  Property of bigjamz

• 13.8 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 324 Fuel-ups

  Property of Bassbuster88

• 15.0 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 452 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• Blue Duce

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 418 Fuel-ups

  Property of drink2006

• 13.8 Avg MPG

• My Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2023 • 47 Fuel-ups

  Property of rwetzeler

• 12.6 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2016 • 316 Fuel-ups

  Property of corvettec5dave

• 17.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2023 • 29 Fuel-ups

  Property of DLoewen

• 14.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 313 Fuel-ups

  Property of cbass25

• 13.4 Avg MPG

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