Click here to see important news regarding the aCar App

2020 GMC Sierra MPG

Based on data from 2 vehicles, 293 fuel-ups and 109,316 miles of driving, the 2020 GMC Sierra gets a combined Avg MPG of 15.64 with a 0.31 MPG margin of error.

Below you can see a distribution of the fuel-ups with 16 outliers (5.18%) removed.

Following shows the average MPG of each of the 2 vehicles in the system.

2020 GMC Sierras For Sale Nearby

  • Garrett’s Truck

    2020 GMC Sierra AT4 5.3L V8 GAS Automatic 8 Speed
    Added Dec 2019 • 194 Fuel-ups

    Property of GMEAUX

  • 16.5 Avg MPG
  • 2020 Sierra

    2020 GMC Sierra AT4 V8 DIESEL
    Added Sep 2021 • 118 Fuel-ups

    Property of Mikemjr1

  • 15.1 Avg MPG

Recent Activity

from other GMC Sierra vehicles (View All)

Tips

Keep Tires Properly Inflated

You can improve your gas mileage by around 3.3 percent by ke... ...

by pb

Read more tips