Click here to see important news regarding the aCar App

2018 GMC Sierra MPG

Based on data from 1 vehicles, 51 fuel-ups and 18,848 miles of driving, the 2018 GMC Sierra gets a combined Avg MPG of 17.88 with a 0.22 MPG margin of error.

Below you can see a distribution of the fuel-ups with 2 outliers (3.77%) removed.

2018 GMC Sierras For Sale Nearby

  • My Sierra

    2018 GMC Sierra Denali 6.2L V8 GAS Automatic 8 Speed
    Added Mar 2019 • 55 Fuel-ups

    Property of snoopkeith

  • 18.1 Avg MPG

Recent Activity

from other GMC Sierra vehicles (View All)


Don't Look Back!

Consider parking at a store in the double parking slots. Th... ...

by cemnei

Read more tips