Based on data from 249 vehicles, 23,906 fuel-ups and 7,153,268 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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• 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 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2021 • 33 Fuel-ups

  Property of curwinagain

• 14.1 Avg MPG

• 2014 GMC Sierra 1500

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

  Property of kwautosales

• 13.6 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

• 2014 GMC

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Jan 2024 • 3 Fuel-ups

  Property of Toddskia

• 12.7 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2013 • 399 Fuel-ups

  Property of Twylyt

• 17.9 Avg MPG

• Denali

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added May 2021 • 21 Fuel-ups

  Property of Dushang

• 11.3 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 550 Fuel-ups

  Property of Larry942

• 15.7 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

• 2014 GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Mar 2023 • 34 Fuel-ups

  Property of Winpooh

• 16.4 Avg MPG

• GRZLYBR

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2023 • 14 Fuel-ups

  Property of MThompsonjr115

• 15.1 Avg MPG

• GMC Sierra 2014

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

  Property of hcmo

• 21.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added May 2023 • 12 Fuel-ups

  Property of rgb820

• 11.3 Avg MPG

• My Sierra 1500

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

  Property of gmmartin

• 15.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added May 2023 • 3 Fuel-ups

  Property of derek18105

• 13.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Nov 2017 • 234 Fuel-ups

  Property of xlocdnguyen

• 14.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Feb 2021 • 101 Fuel-ups

  Property of Mdunbar1994

• 15.6 Avg MPG

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