The gas mileage for the 2021 Chevrolet Suburban varies by engine type:

1. 5.3-liter V8 Engine: This engine has an EPA-estimated fuel efficiency of 16 mpg in the city, 20 mpg on the highway, and 18 mpg combined source.

2. 6.2-liter V8 Engine: For the larger engine, the estimated fuel economy is approximately 14 mpg city, 20 mpg highway, and 16 mpg combined.

3. Duramax 3.0-liter I6 Turbo-Diesel Engine: This variant offers improved efficiency, rated at 20 mpg city, 26 mpg highway, and 22 mpg combined, making it the most efficient option in the Suburban lineup source.

These estimates may vary depending on factors such as driving habits and road conditions. For more details and additional resources, you can visit the Fuel Economy website.

Sources

https://www.fueleconomy.gov/feg/bymodel/2021_Chevr...2021 Chevrolet Suburban Diesel First Drive: The One to BuyActual MPG from 30 2021 Chevrolet Suburban owners - Fuelly2021 Chevrolet Suburban - Specs, Prices, MPG, Reviews & PhotosUsed 2021 Chevrolet Suburban MPG & Gas Mileage Data - Edmunds2021 Chevy Tahoe/Suburban, GMC Yukons Improve City MPG2021 Chevrolet Suburban Diesel First Test: The Most Efficient Big SUV

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