2026 Chevy Tahoe Gas Mileage: 16–24 MPG Combined

A 2026 Chevy Tahoe is EPA-rated at 16–24 mpg combined, depending on engine and drivetrain. Gasoline V8 models return 16–17 mpg combined; the 3.0L Duramax diesel returns 22–24 mpg combined.

2026 Chevy Tahoe MPG table

Engine	Drivetrain	City	Highway	Combined
3.0L Duramax turbo-diesel	2WD	22 mpg	26 mpg	24 mpg
3.0L Duramax turbo-diesel	4WD	20 mpg	24 mpg	22 mpg
5.3L gasoline V8	2WD	15 mpg	20 mpg	17 mpg
5.3L gasoline V8	4WD	15 mpg	19 mpg	17 mpg
6.2L gasoline V8	2WD	15 mpg	20 mpg	17 mpg
6.2L gasoline V8	4WD	14 mpg	18 mpg	16 mpg

The EPA lists six 2026 Tahoe fuel-economy results. The engine and drivetrain mapping is shown in Cars.com’s 2026 Tahoe powertrain table. MPG applies to the specified powertrain, not every Tahoe carrying the same trim badge.

Chevrolet offers the 2026 diesel on LT, RST, Z71, Premier and High Country. The 5.3L is standard on every model except High Country, while the 6.2L is standard on High Country and available on RST, Z71 and Premier, according to Chevrolet’s 2026 Tahoe specifications.

Which Tahoe uses the least fuel?

The 2WD 3.0L Duramax has the highest rating at 24 mpg combined. GM also lists 22 mpg city, 26 mpg highway and up to 624 miles of EPA-estimated highway range for that configuration (GM News).

At 10,000 miles, the EPA combined ratings work out to approximately:

Combined rating	Fuel used per 10,000 miles
24 mpg	417 gallons
22 mpg	455 gallons
17 mpg	588 gallons
16 mpg	625 gallons

A 24-mpg diesel would therefore use about 172 fewer gallons per 10,000 miles than a 17-mpg gasoline Tahoe. That does not automatically make the diesel less expensive to own: compare local diesel and gasoline prices, the engine’s purchase price and your expected mileage.

Use this calculation with your own numbers:

Annual fuel cost = annual miles ÷ combined mpg × local price per gallon

For gasoline-only shoppers, the 5.3L and 6.2L 2WD models carry the same 17-mpg combined rating. With 4WD, the 5.3L is rated at 17 mpg combined versus 16 mpg for the 6.2L.

Why your Tahoe may not match its EPA rating

EPA combined MPG is not a simple average: it weights city driving at 55% and highway driving at 45%. The agency also says driving style, maintenance, accessory use, weather, road conditions and vehicle load can change real-world fuel economy (EPA fuel-economy label guide).

For a Tahoe already on a dealer lot, check its window sticker for the exact engine, 2WD or 4WD drivetrain and EPA ratings. For a used Tahoe, search by its actual model year rather than applying the 2026 figures; powertrains and ratings vary by generation.

If fuel use is only one part of the buying decision, compare the Tahoe’s shorter body with the extra cargo room of the Chevrolet Suburban.