Based on data from 254 vehicles, 24,096 fuel-ups and 7,239,724 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 (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 (92) Other (36)

Below you can see a distribution of the fuel-ups with 1102 outliers (4.37%) removed.

Following shows the average MPG of each of the 254 vehicles in the system.

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• Haul It! 2

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2019 • 133 Fuel-ups

  Property of pcotto87

• 15.8 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 373 Fuel-ups

  Property of azninc13

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added May 2022 • 25 Fuel-ups

  Property of livewyre13

• 12.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 194 Fuel-ups

  Property of Don31980

• 14.3 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1119 Fuel-ups

  Property of shuckeba

• 11.2 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 580 Fuel-ups

  Property of Larry942

• 15.8 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 474 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 438 Fuel-ups

  Property of capnmo

• 14.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 207 Fuel-ups

  Property of Vrooom7979

• 14.6 Avg MPG

• My Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2023 • 65 Fuel-ups

  Property of jamesg88

• 17.7 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2018 • 202 Fuel-ups

  Property of SallySilverado

• 16.6 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2023 • 420 Fuel-ups

  Property of BMooyaso

• 18.9 Avg MPG

• 14 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 342 Fuel-ups

  Property of Bassbuster88

• 15.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 267 Fuel-ups

  Property of Gott42

• 14.9 Avg MPG

• 2014 Sierra Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2018 • 170 Fuel-ups

  Property of smokinu454

• 15.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Dec 2018 • 357 Fuel-ups

  Property of bnlitton

• 15.2 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 238 Fuel-ups

  Property of JoynerFuel

• 16.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2021 • 238 Fuel-ups

  Property of Firebird455

• 16.8 Avg MPG

• GMC Sierra 2014

  2014 GMC Sierra 1500 SLE Automatic 6 Speed Crew Cab Pickup
  Added Aug 2024 • 8 Fuel-ups

  Property of kevinbogle1278

• 16.9 Avg MPG

• Sierra 1500 - 2014

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 197 Fuel-ups

  Property of SGwyn

• 14.8 Avg MPG

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