Based on data from 254 vehicles, 24,102 fuel-ups and 7,241,477 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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• 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

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2021 • 95 Fuel-ups

  Property of dkelly9

• 16.6 Avg MPG

• Sierra 1500 6.2L

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2020 • 166 Fuel-ups

  Property of srquill

• 15.1 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Oct 2016 • 336 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 • 47 Fuel-ups

  Property of DLoewen

• 14.4 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE
  Added Sep 2018 • 461 Fuel-ups

  Property of nittany815

• 15.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Feb 2024 • 15 Fuel-ups

  Property of Bward7

• 13.9 Avg MPG

• 2014 GMC

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Jan 2024 • 11 Fuel-ups

  Property of Toddskia

• 15.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2021 • 40 Fuel-ups

  Property of curwinagain

• 14.0 Avg MPG

• My Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2023 • 57 Fuel-ups

  Property of rwetzeler

• 13.2 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2017 • 324 Fuel-ups

  Property of wakerunner08

• 16.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2024 • 5 Fuel-ups

  Property of Tyler4450

• 14.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2024 • 8 Fuel-ups

  Property of truckerjosh

• 16.5 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2020 • 148 Fuel-ups

  Property of LWConrad

• 15.2 Avg MPG

• My Sierra

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2024 • 16 Fuel-ups

  Property of JaceTheMNMan

• 15.9 Avg MPG

• George

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2020 • 399 Fuel-ups

  Property of GeorgeParker

• 19.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2016 • 340 Fuel-ups

  Property of cbass25

• 13.5 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2024 • 20 Fuel-ups

  Property of kejw

• 13.0 Avg MPG

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