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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• Truck

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

  Property of Fletch64

• 16.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added May 2015 • 36 Fuel-ups

  Property of stocktbc84

• 27.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 GAS V8
  Added Feb 2014 • 93 Fuel-ups

  Property of skyking76

• 18.6 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Extended Cab Pickup (4 Door)
  Added Nov 2014 • 65 Fuel-ups

  Property of littleturk

• 17.1 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2015 • 50 Fuel-ups

  Property of Travis12345

• 17.2 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Aug 2015 • 5 Fuel-ups

  Property of BushX

• 18.3 Avg MPG

• GMC

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 30 Fuel-ups

  Property of chad418

• 14.8 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Aug 2015 • 3 Fuel-ups

  Property of evanski9

• 20.1 Avg MPG

• My Truck

  2014 GMC Sierra 1500 5.3L V8 FLEX Automatic 6 Extended Cab Pickup (4 Door)
  Added Nov 2014 • 48 Fuel-ups

  Property of akiyonaga

• 16.6 Avg MPG

• ole white

  2014 GMC Sierra 1500 4.3L FLEX V6 Automatic 6 Extended Cab Pickup (4 Door)
  Added Jul 2014 • 31 Fuel-ups

  Property of jeremywpiforester

• 17.9 Avg MPG

• Pimp Truck

  2014 GMC Sierra 1500 SLT Automatic 6
  Added Feb 2014 • 74 Fuel-ups

  Property of Offspring22

• 14.7 Avg MPG

• Blue Big

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6
  Added Jul 2014 • 12 Fuel-ups

  Property of jkcampin

• 12.8 Avg MPG

• Truck

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Crew Cab Pickup (4 Door)
  Added Nov 2014 • 40 Fuel-ups

  Property of Doobs41378

• 15.7 Avg MPG

• 2014 GMC Sierra Crew Cab Short Box

  2014 GMC Sierra 1500 SLE 4.3L FLEX V6 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2014 • 64 Fuel-ups

  Property of AWDAudi

• 19.5 Avg MPG

• Mack GMC

  2014 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed
  Added Apr 2017 • 3 Fuel-ups

  Property of mackmjr

• 15.3 Avg MPG

• truck

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Mar 2015 • 8 Fuel-ups

  Property of cajun_duck

• 17.3 Avg MPG

• atgmc

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added May 2015 • 5 Fuel-ups

  Property of atgmc

• 3.2 Avg MPG

• Truck

  2014 GMC Sierra 1500
  Added Mar 2014 • 53 Fuel-ups

  Property of Hilde05

• 17.3 Avg MPG

• Greyie

  2014 GMC Sierra 1500 SLT 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • 28 Fuel-ups

  Property of Freddyolmos04

• 16.9 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 4.3L FLEX V6 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2015 • 20 Fuel-ups

  Property of david76

• 17.6 Avg MPG

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