Based on data from 255 vehicles, 24,219 fuel-ups and 7,273,216 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.64 with a 0.04 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (20) 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 (93) Other (36)

Below you can see a distribution of the fuel-ups with 1105 outliers (4.36%) removed.

Following shows the average MPG of each of the 255 vehicles in the system.

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• Sierra 1500 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2020 • 170 Fuel-ups

  Property of srquill

• 15.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 341 Fuel-ups

  Property of cbass25

• 13.5 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 242 Fuel-ups

  Property of JoynerFuel

• 16.3 Avg MPG

• 2014 Sierra Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2018 • 177 Fuel-ups

  Property of smokinu454

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 199 Fuel-ups

  Property of Don31980

• 14.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 361 Fuel-ups

  Property of bnlitton

• 15.2 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2020 • 149 Fuel-ups

  Property of LWConrad

• 15.2 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 205 Fuel-ups

  Property of SallySilverado

• 16.6 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1129 Fuel-ups

  Property of shuckeba

• 11.2 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2017 • 326 Fuel-ups

  Property of wakerunner08

• 16.8 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2016 • 340 Fuel-ups

  Property of corvettec5dave

• 17.8 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 481 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 378 Fuel-ups

  Property of azninc13

• 15.4 Avg MPG

• Sierra 1500 - 2014

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 202 Fuel-ups

  Property of SGwyn

• 14.8 Avg MPG

• My Sierra 1500

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

  Property of DLoewen

• 14.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 209 Fuel-ups

  Property of Vrooom7979

• 14.6 Avg MPG

• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 296 Fuel-ups

  Property of jayner86

• 11.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2024 • 16 Fuel-ups

  Property of truckerjosh

• 16.0 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 586 Fuel-ups

  Property of Larry942

• 15.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 272 Fuel-ups

  Property of Gott42

• 14.9 Avg MPG

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