Based on data from 258 vehicles, 25,633 fuel-ups and 7,709,229 miles of driving, the 2014 GMC Sierra 1500 gets a combined Avg MPG of 15.63 with a 0.04 MPG margin of error.

Any Engine Type 4.3L V6 FLEX (19) 5.3L V8 FLEX (172) 6.2L V8 GAS (26) GAS (2) V6 GAS (6) V8 GAS (24) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (18) Crew Cab Pickup (49) Cab & Chassis - Crew Cab (2) Any Submodel Base (14) Denali (20) SLE (93) SLT (95) Other (36)

Below you can see a distribution of the fuel-ups with 1158 outliers (4.32%) removed.

Following shows the average MPG of each of the 258 vehicles in the system.

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• The Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2018 • 231 Fuel-ups

  Property of coreyrink

• 16.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2018 • 289 Fuel-ups

  Property of Gott42

• 14.7 Avg MPG

• 2014 Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2025 • 5 Fuel-ups

  Property of dillpill88

• 14.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2025 • 6 Fuel-ups

  Property of Notsew96

• 13.5 Avg MPG

• Haul It! 2

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2019 • 143 Fuel-ups

  Property of pcotto87

• 15.8 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2023 • 431 Fuel-ups

  Property of BMooyaso

• 18.9 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2018 • 1151 Fuel-ups

  Property of shuckeba

• 11.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2021 • 97 Fuel-ups

  Property of dkelly9

• 16.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Feb 2024 • 24 Fuel-ups

  Property of Bward7

• 13.7 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Oct 2019 • 250 Fuel-ups

  Property of JoynerFuel

• 16.1 Avg MPG

• Larry's GMC Sierra Crew Cab

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2016 • 487 Fuel-ups

  Property of lundrider

• 15.7 Avg MPG

• Sierra 1500 - 2014

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2019 • 209 Fuel-ups

  Property of SGwyn

• 14.8 Avg MPG

• My Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2023 • 72 Fuel-ups

  Property of rwetzeler

• 12.8 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLT Automatic 6 Speed
  Added Nov 2024 • 13 Fuel-ups

  Property of texan1955

• 15.7 Avg MPG

• My Sierra 1500 SLT

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2023 • 74 Fuel-ups

  Property of jamesg88

• 17.6 Avg MPG

• Furiosa

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jul 2017 • 389 Fuel-ups

  Property of azninc13

• 15.4 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2016 • 345 Fuel-ups

  Property of corvettec5dave

• 17.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2018 • 214 Fuel-ups

  Property of Vrooom7979

• 14.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2020 • 209 Fuel-ups

  Property of Don31980

• 14.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2020 • 449 Fuel-ups

  Property of capnmo

• 14.3 Avg MPG

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