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2018 GMC Sierra 1500 MPG

Based on data from 193 vehicles, 17,926 fuel-ups and 5,067,207 miles of driving, the 2018 GMC Sierra 1500 gets a combined Avg MPG of 15.97 with a 0.05 MPG margin of error.

Below you can see a distribution of the fuel-ups with 246 outliers (1.35%) removed.

Following shows the average MPG of each of the 193 vehicles in the system.

2018 GMC Sierra 1500s For Sale Nearby

  • GMC 18

    2018 GMC Sierra 1500 SLE 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
    Added Apr 2018 • 4 Fuel-ups

    Property of Beef56

  • 21.2 Avg MPG
  • Sierra ‘18

    2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
    Added Dec 2017 • 26 Fuel-ups

    Property of karldv

  • 13.4 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added May 2018 • 11 Fuel-ups

    Property of dbierman

  • 17.5 Avg MPG
  • Dad's Truck

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Jul 2018 • 10 Fuel-ups

    Property of Jake57

  • 13.4 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Mar 2018 • 14 Fuel-ups

    Property of bass685

  • 15.9 Avg MPG
  • 2018 Sierra

    2018 GMC Sierra 1500 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
    Added Mar 2018 • 5 Fuel-ups

    Property of handovdoom

  • 16.4 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
    Added Jan 2018 • 25 Fuel-ups

    Property of mikepru

  • 16.8 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
    Added Jan 2018 • 27 Fuel-ups

    Property of brettsinyard

  • 14.0 Avg MPG
  • BKMX120

    2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed
    Added Jan 2018 • 13 Fuel-ups

    Property of bkeating

  • 15.9 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 Denali 5.3L V8 FLEX Automatic 8 Speed
    Added Mar 2018 • 5 Fuel-ups

    Property of hornedfrog05

  • 18.5 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
    Added Feb 2018 • 3 Fuel-ups

    Property of dail0054

  • 11.6 Avg MPG
  • Sierra

    2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed
    Added Jul 2021 • 122 Fuel-ups

    Property of Bigtrucker53

  • 17.4 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
    Added Oct 2017 • 5 Fuel-ups

    Property of cburley

  • 16.9 Avg MPG

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