Based on data from 367 vehicles, 23,949 fuel-ups and 7,164,979 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 (2.03%) removed.

Following shows the average MPG of each of the 367 vehicles in the system.

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• All Terrain

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Oct 2014 • No Fuel-ups

  Property of Dropsix

• 0.0 Avg MPG

• Black Truck

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 5 Speed Extended Cab Pickup
  Added Jan 2019 • No Fuel-ups

  Property of greatscott81

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Feb 2016 • No Fuel-ups

  Property of mblanar33

• 0.0 Avg MPG

• Mike's baby

  2014 GMC Sierra 1500 GAS V8
  Added Jan 2014 • No Fuel-ups

  Property of Mike527

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Dec 2015 • No Fuel-ups

  Property of hs_almansoori

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 4.3L V6 FLEX Automatic 6 Speed
  Added Feb 2017 • No Fuel-ups

  Property of heatherberry

• 0.0 Avg MPG

• Kristi

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Extended Cab Pickup (4 Door)
  Added Sep 2014 • No Fuel-ups

  Property of z71sierra

• 0.0 Avg MPG

• My Sierra 1500

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

  Property of CoddyyD

• 0.0 Avg MPG

• My Sierra 1500

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

  Property of eibarra

• 0.0 Avg MPG

• Gmc

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed
  Added Jun 2016 • No Fuel-ups

  Property of blakely778

• 0.0 Avg MPG

• Farm Truck

  2014 GMC Sierra 1500 GAS V8
  Added May 2014 • No Fuel-ups

  Property of truckfuel

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Sep 2020 • No Fuel-ups

  Property of philhender

• 0.0 Avg MPG

• Truck

  2014 GMC Sierra 1500
  Added Jun 2014 • No Fuel-ups

  Property of nashmoc

• 0.0 Avg MPG

• Jenny

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
  Added Sep 2020 • No Fuel-ups

  Property of NathanU

• 0.0 Avg MPG

• SeaTec Sierra 5.3L

  2014 GMC Sierra 1500 GAS
  Added Dec 2013 • No Fuel-ups

  Property of seatec

• 0.0 Avg MPG

• Mine

  2014 GMC Sierra 1500 SLE 5.3L V8 FLEX 5328cc Automatic 6
  Added Jun 2014 • No Fuel-ups

  Property of caseymorgan

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Aug 2022 • No Fuel-ups

  Property of ksmall

• 0.0 Avg MPG

• Sierra

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Dec 2014 • No Fuel-ups

  Property of EaZ8

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLE 5.3L FLEX V8 Automatic 6 Crew Cab Pickup (4 Door)
  Added Jan 2015 • No Fuel-ups

  Property of rastataoist

• 0.0 Avg MPG

• My Sierra 1500

  2014 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
  Added Mar 2019 • No Fuel-ups

  Property of troyswim

• 0.0 Avg MPG

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