2020 GMC Sierra MPG
Based on data from 2 vehicles, 290 fuel-ups and 108,271 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 (5.23%) removed.
Following shows the average MPG of each of the 2 vehicles in the system.
2020 GMC Sierras For Sale Nearby
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Garrett’s Truck
2020 GMC Sierra AT4 5.3L V8 GAS Automatic 8 Speed
Added Dec 2019 • 191 Fuel-upsProperty of GMEAUX
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16.5 Avg MPG
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2020 Sierra
2020 GMC Sierra AT4 V8 DIESEL
Added Sep 2021 • 118 Fuel-upsProperty of Mikemjr1
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15.1 Avg MPG