Based on data from 249 vehicles, 23,868 fuel-ups and 7,142,277 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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• 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

• 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

• Haul It! 2

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2019 • 113 Fuel-ups

  Property of pcotto87

• 15.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 162 Fuel-ups

  Property of Don31980

• 14.2 Avg MPG

• 2014 Sierra Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2018 • 146 Fuel-ups

  Property of smokinu454

• 15.3 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2023 • 391 Fuel-ups

  Property of BMooyaso

• 18.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Feb 2024 • 4 Fuel-ups

  Property of Bward7

• 13.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2021 • 33 Fuel-ups

  Property of curwinagain

• 14.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 170 Fuel-ups

  Property of SGwyn

• 14.6 Avg MPG

• 2014 GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 348 Fuel-ups

  Property of kwautosales

• 13.6 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2019 • 188 Fuel-ups

  Property of hoffman720

• 13.8 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2020 • 124 Fuel-ups

  Property of LWConrad

• 15.5 Avg MPG

• All Terrain CC 5.3

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • 231 Fuel-ups

  Property of Evan48

• 16.9 Avg MPG

• Giannina

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2020 • 146 Fuel-ups

  Property of Afterlife

• 13.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2021 • 78 Fuel-ups

  Property of dkelly9

• 16.6 Avg MPG

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