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2018 GMC Sierra 1500 MPG

Based on data from 186 vehicles, 16,347 fuel-ups and 4,617,498 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 236 outliers (1.42%) removed.

Following shows the average MPG of each of the 186 vehicles in the system.

2018 GMC Sierra 1500s For Sale Nearby

  • Rich's Truck

    2018 GMC Sierra 1500 SLE 5.3L V8 GAS Automatic 6 Speed Extended Cab Pickup
    Added Jul 2019 • 136 Fuel-ups

    Property of rcorning

  • 18.0 Avg MPG
  • GMC Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added Jan 2018 • 62 Fuel-ups

    Property of Phlip

  • 16.7 Avg MPG
  • GMC Denali

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed
    Added Oct 2022 • 43 Fuel-ups

    Property of ArtieBar64

  • 16.5 Avg MPG
  • GMC

    2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 8 Speed Crew Cab Pickup
    Added Jul 2022 • 76 Fuel-ups

    Property of jscott2126

  • 15.5 Avg MPG
  • 2018 GMC Sierra

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
    Added Apr 2022 • 149 Fuel-ups

    Property of rtsteen

  • 17.7 Avg MPG
  • Sierra

    2018 GMC Sierra 1500 Denali 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Oct 2018 • 169 Fuel-ups

    Property of ScottyR

  • 13.9 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed
    Added Sep 2022 • 12 Fuel-ups

    Property of conan05

  • 13.3 Avg MPG
  • Quicksilver

    2018 GMC Sierra 1500 SLT 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
    Added Jun 2020 • 230 Fuel-ups

    Property of tootall518

  • 16.3 Avg MPG
  • Denali

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Jan 2018 • 354 Fuel-ups

    Property of Godofwine7

  • 15.9 Avg MPG
  • Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added May 2021 • 108 Fuel-ups

    Property of gabeyoung

  • 11.8 Avg MPG
  • Sierra

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 6 Speed Crew Cab Pickup
    Added Apr 2019 • 371 Fuel-ups

    Property of CAHayes1109

  • 13.9 Avg MPG
  • Truck

    2018 GMC Sierra 1500 Denali 6.2L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Mar 2020 • 173 Fuel-ups

    Property of jasonbrakhage

  • 14.3 Avg MPG
  • Sierra

    2018 GMC Sierra 1500 Denali Automatic 8 Speed Crew Cab Pickup
    Added Jul 2021 • 89 Fuel-ups

    Property of ch56vy

  • 13.7 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added Aug 2019 • 15 Fuel-ups

    Property of jessbeavers

  • 25.4 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 5.3L V8 GAS Automatic 6 Speed
    Added Oct 2022 • 162 Fuel-ups

    Property of Mstc

  • 15.5 Avg MPG
  • Truck

    2018 GMC Sierra 1500 4.3L V6 FLEX Automatic 6 Speed Standard Cab Pickup
    Added May 2019 • 7 Fuel-ups

    Property of mcgannd

  • 24.8 Avg MPG
  • 2018GMC SIERRA 4X4

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Feb 2020 • 90 Fuel-ups

    Property of jjz3

  • 19.0 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 6.2L V8 GAS Automatic 8 Speed
    Added Sep 2018 • 322 Fuel-ups

    Property of Polar800

  • 13.9 Avg MPG
  • GMC 1500 4x4

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed Crew Cab Pickup
    Added Feb 2018 • 197 Fuel-ups

    Property of kiscl

  • 14.7 Avg MPG
  • My Sierra 1500

    2018 GMC Sierra 1500 SLT 5.3L V8 GAS Automatic 8 Speed
    Added Sep 2018 • 125 Fuel-ups

    Property of rinman

  • 15.1 Avg MPG

Recent Activity

from other GMC Sierra 1500 vehicles (View All)

Tips

Watch That Speed Limit!

Every vehicle reaches its optimal fuel economy at a differen... ...

by DrewSRQ

Read more tips