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2018 GMC Sierra MPG

Based on data from 3 vehicles, 148 fuel-ups and 48,840 miles of driving, the 2018 GMC Sierra gets a combined Avg MPG of 16.05 with a 0.18 MPG margin of error.

Below you can see a distribution of the fuel-ups with 7 outliers (4.52%) removed.

Following shows the average MPG of each of the 3 vehicles in the system.

2018 GMC Sierras For Sale Nearby

  • My Sierra

    2018 GMC Sierra Denali 6.2L V8 GAS Automatic 8 Speed
    Added Mar 2019 • 177 Fuel-ups

    Property of snoopkeith

  • 17.7 Avg MPG
  • My Sierra

    2018 GMC Sierra SLE 5.3L V8 FLEX Automatic 6 Speed
    Added Oct 2023 • 5 Fuel-ups

    Property of AllOut

  • 7.3 Avg MPG
  • Truck

    2018 GMC Sierra All Terrain 5.3L V8 FLEX Automatic 6 Speed Crew Cab Pickup
    Added Oct 2020 • 4 Fuel-ups

    Property of henryjp

  • 16.0 Avg MPG

Recent Activity

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Tips

Turn the engine off at long red lights

You can save some gas by turning your engine off at long red... ...

by jgibbsjr

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