Based on data from 254 vehicles, 24,093 fuel-ups and 7,238,746 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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• Sierra

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added May 2017 • 183 Fuel-ups

  Property of Kysened

• 22.3 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2016 • 131 Fuel-ups

  Property of huggybear

• 17.8 Avg MPG

• Clifford

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2019 • 25 Fuel-ups

  Property of Driver2995

• 13.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Nov 2017 • 17 Fuel-ups

  Property of KBorden

• 18.9 Avg MPG

• BURCH'S Z-71

  2014 GMC Sierra 1500
  Added Mar 2014 • 197 Fuel-ups

  Property of jburch77

• 13.4 Avg MPG

• 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 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 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

• 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

• 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

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