Based on data from 250 vehicles, 23,540 fuel-ups and 7,033,687 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 (166) 6.2L V8 GAS (25) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (15) Crew Cab Pickup (47) Cab & Chassis - Crew Cab (2) Any Submodel Base (13) Denali (18) SLT (89) SLE (94) Other (36)

Below you can see a distribution of the fuel-ups with 492 outliers (2.05%) removed.

Following shows the average MPG of each of the 250 vehicles in the system.

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• All Terrain CC 5.3

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 215 Fuel-ups

  Property of Evan48

• 16.9 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1015 Fuel-ups

  Property of shuckeba

• 11.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 282 Fuel-ups

  Property of jmb23802

• 16.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 150 Fuel-ups

  Property of SGwyn

• 14.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 293 Fuel-ups

  Property of cbass25

• 13.4 Avg MPG

• Gmc Sierra

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 300 Fuel-ups

  Property of blazer6596

• 16.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 210 Fuel-ups

  Property of Gott42

• 14.9 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 291 Fuel-ups

  Property of Bassbuster88

• 14.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 197 Fuel-ups

  Property of Firebird455

• 16.8 Avg MPG

• My Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2023 • 33 Fuel-ups

  Property of jamesg88

• 18.7 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Nov 2019 • 147 Fuel-ups

  Property of Bluecoma

• 17.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 172 Fuel-ups

  Property of Vrooom7979

• 14.6 Avg MPG

• Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added May 2021 • 20 Fuel-ups

  Property of Dushang

• 11.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2021 • 119 Fuel-ups

  Property of Buildmorediesels

• 16.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2023 • 10 Fuel-ups

  Property of DLoewen

• 14.3 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 191 Fuel-ups

  Property of JoynerFuel

• 16.3 Avg MPG

• 2014 GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 320 Fuel-ups

  Property of kwautosales

• 13.6 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 342 Fuel-ups

  Property of azninc13

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added May 2022 • 3 Fuel-ups

  Property of livewyre13

• 11.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 128 Fuel-ups

  Property of Don31980

• 14.5 Avg MPG

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