Based on data from 255 vehicles, 24,194 fuel-ups and 7,266,974 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 (20) 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 (93) Other (36)

Below you can see a distribution of the fuel-ups with 1105 outliers (4.37%) removed.

Following shows the average MPG of each of the 255 vehicles in the system.

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• 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

• 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 • 32 Fuel-ups

  Property of kejw

• 13.1 Avg MPG

• 2014 GMC Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 355 Fuel-ups

  Property of kwautosales

• 13.6 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 • 242 Fuel-ups

  Property of Evan48

• 16.9 Avg MPG

• Sonoma Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2015 • 84 Fuel-ups

  Property of Sasquatchewan

• 15.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2018 • 326 Fuel-ups

  Property of jmb23802

• 16.1 Avg MPG

• GMC Sierra 2014

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Sep 2021 • 25 Fuel-ups

  Property of hcmo

• 23.6 Avg MPG

• 2014 - Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2018 • 138 Fuel-ups

  Property of CNCGUY

• 15.0 Avg MPG

• Sierra

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

  Property of breiler

• 16.2 Avg MPG

• Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added May 2021 • 23 Fuel-ups

  Property of Dushang

• 11.2 Avg MPG

• x2014 Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2022 • 74 Fuel-ups

  Property of bigjamz

• 13.8 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2013 • 400 Fuel-ups

  Property of Twylyt

• 17.9 Avg MPG

• Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Oct 2022 • 86 Fuel-ups

  Property of COM-Mattawa

• 16.5 Avg MPG

• Blue Duce

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Oct 2017 • 419 Fuel-ups

  Property of drink2006

• 13.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2021 • 75 Fuel-ups

  Property of onEsierra

• 14.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2021 • 126 Fuel-ups

  Property of Buildmorediesels

• 16.3 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Cab & Chassis - Crew Cab
  Added Nov 2019 • 151 Fuel-ups

  Property of Bluecoma

• 17.0 Avg MPG

• Jamie

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2023 • 4 Fuel-ups

  Property of speedyjon2829

• 14.8 Avg MPG

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