Based on data from 367 vehicles, 23,953 fuel-ups and 7,165,978 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 (26) 5.3L V8 FLEX (245) 6.2L V8 GAS (30) GAS (4) V6 GAS (6) V8 GAS (39) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (21) Crew Cab Pickup (60) Cab & Chassis - Crew Cab (2) Cab & Chassis - Extended Cab (1) Any Submodel Base (19) Denali (25) SLE (133) SLT (133) Other (57)

Below you can see a distribution of the fuel-ups with 497 outliers (2.03%) removed.

Following shows the average MPG of each of the 367 vehicles in the system.

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• Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2024 • 10 Fuel-ups

  Property of kejw

• 12.5 Avg MPG

• 2014 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2022 • 72 Fuel-ups

  Property of bigjamz

• 13.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 243 Fuel-ups

  Property of Gott42

• 14.9 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2019 • 191 Fuel-ups

  Property of hoffman720

• 13.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 319 Fuel-ups

  Property of bnlitton

• 15.3 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 185 Fuel-ups

  Property of SallySilverado

• 16.6 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 457 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 173 Fuel-ups

  Property of SGwyn

• 14.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 551 Fuel-ups

  Property of Larry942

• 15.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added May 2022 • 18 Fuel-ups

  Property of livewyre13

• 11.8 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 327 Fuel-ups

  Property of Bassbuster88

• 15.0 Avg MPG

• 2014 GMC

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Jan 2024 • 4 Fuel-ups

  Property of Toddskia

• 12.8 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2017 • 311 Fuel-ups

  Property of wakerunner08

• 16.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2021 • 79 Fuel-ups

  Property of dkelly9

• 16.5 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2020 • 126 Fuel-ups

  Property of LWConrad

• 15.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 165 Fuel-ups

  Property of Don31980

• 14.3 Avg MPG

• My Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2023 • 48 Fuel-ups

  Property of rwetzeler

• 12.7 Avg MPG

• GMC sierra allterrain

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 265 Fuel-ups

  Property of jayner86

• 11.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 217 Fuel-ups

  Property of Firebird455

• 16.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 311 Fuel-ups

  Property of jmb23802

• 16.1 Avg MPG

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