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 All Terrain

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Jan 2017 • 31 Fuel-ups

  Property of cortez

• 15.4 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Oct 2017 • 9 Fuel-ups

  Property of kpwaterdoc

• 19.0 Avg MPG

• Dell McDonald

  2014 GMC Sierra 1500 Z71
  Added Mar 2018 • 347 Fuel-ups

  Property of DellMc

• 15.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2017 • 11 Fuel-ups

  Property of shawn0667

• 19.5 Avg MPG

• GMC Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 20 Fuel-ups

  Property of LloydChrisWilson

• 13.6 Avg MPG

• 2014 GMC Sierra 1500 All Terrain Z71 6.2L 4x4

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Aug 2015 • 138 Fuel-ups

  Property of HemiOverlandJGC

• 16.6 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Jul 2013 • 84 Fuel-ups

  Property of Heneisend

• 14.8 Avg MPG

• GMC 2014

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2017 • 103 Fuel-ups

  Property of Coldbuck

• 16.7 Avg MPG

• Tom's Truck

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Speed Standard Cab Pickup
  Added Jul 2018 • 76 Fuel-ups

  Property of tatertom

• 19.1 Avg MPG

• All Terrain

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jul 2014 • 154 Fuel-ups

  Property of sllarson55

• 17.0 Avg MPG

• GMC Denali

  2014 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Apr 2018 • 37 Fuel-ups

  Property of spicor30

• 15.5 Avg MPG

• 2014 GMC Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Extended Cab Pickup
  Added Nov 2013 • 78 Fuel-ups

  Property of Horhay7

• 12.5 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 6 Speed
  Added Dec 2017 • 62 Fuel-ups

  Property of ScubaRx

• 12.0 Avg MPG

• Brad's Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Extended Cab Pickup (4 Door)
  Added Jan 2014 • 251 Fuel-ups

  Property of juneau76

• 17.0 Avg MPG

• Mike's Truck

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Crew Cab Pickup (4 Door)
  Added Jul 2014 • 123 Fuel-ups

  Property of Mdihle

• 18.1 Avg MPG

• Truck

  2014 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added May 2015 • 54 Fuel-ups

  Property of Jackseric

• 18.4 Avg MPG

• Truck

  2014 GMC Sierra 1500 GAS V8
  Added Jan 2014 • 43 Fuel-ups

  Property of Isorg

• 16.1 Avg MPG

• truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added May 2015 • 99 Fuel-ups

  Property of marchioa

• 12.7 Avg MPG

• Sierra

  2014 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 6 Speed Crew Cab Pickup
  Added Oct 2017 • 101 Fuel-ups

  Property of wildman22john

• 15.4 Avg MPG

• Sierra 14

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Jan 2018 • 204 Fuel-ups

  Property of munterhitch

• 18.1 Avg MPG

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