Based on data from 367 vehicles, 23,895 fuel-ups and 7,150,588 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 (26) 5.3L V8 FLEX (245) 6.2L V8 GAS (30) GAS (4) V6 GAS (6) V8 GAS (39) Any Body Style Standard Cab Pickup (3) Extended Cab Pickup (21) Crew Cab Pickup (60) Cab & Chassis - Crew Cab (2) Cab & Chassis - Extended Cab (1) Any Submodel Base (19) Denali (25) SLE (133) SLT (133) Other (57)

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 367 vehicles in the system.

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• silver bullet

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jun 2015 • 106 Fuel-ups

  Property of builtoride

• 18.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 Denali 6.2L GAS V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Mar 2015 • 200 Fuel-ups

  Property of dieseldantwo

• 15.8 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2017 • 149 Fuel-ups

  Property of jrewingAB

• 18.3 Avg MPG

• Turkey slayer

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jul 2018 • 9 Fuel-ups

  Property of Silverbullet199t

• 15.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2018 • 2 Fuel-ups

  Property of lynn88jeff

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2014 • 317 Fuel-ups

  Property of Bayou6

• 14.8 Avg MPG

• The Yeti (4wd)

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2014 • 154 Fuel-ups

  Property of ClancyWiggum

• 15.5 Avg MPG

• GMC Sierra SLE

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Apr 2017 • No Fuel-ups

  Property of ajatdavis4

• 0.0 Avg MPG

• GMC Sierra All Terrain

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2016 • 119 Fuel-ups

  Property of zach_oaks

• 18.6 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2018 • 31 Fuel-ups

  Property of jkieser

• 16.7 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2017 • 26 Fuel-ups

  Property of McKerv

• 17.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Mar 2017 • 38 Fuel-ups

  Property of mastiempo

• 14.8 Avg MPG

• SLEDGEHAMMER

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2014 • 68 Fuel-ups

  Property of MThompsonjr115

• 15.6 Avg MPG

• GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Feb 2018 • 2 Fuel-ups

  Property of Parte

• 15.7 Avg MPG

• DENALI

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed
  Added Jan 2018 • 290 Fuel-ups

  Property of FuelHunt

• 14.5 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Sep 2014 • 114 Fuel-ups

  Property of jfreed

• 13.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2017 • 1 Fuel-up

  Property of aimanrrr

• 0.0 Avg MPG

• GMC Sierra All Terrain

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jul 2017 • 38 Fuel-ups

  Property of caseyp

• 17.2 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Dec 2013 • 140 Fuel-ups

  Property of russ9443

• 15.9 Avg MPG

• Crosshairs

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2018 • No Fuel-ups

  Property of Symone15

• 0.0 Avg MPG

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