Video: The 2024 Chevy Silverado HD Has a More Powerful V8 Duramax Diesel, but Does It Get Better MPG?

I drive it on the highway and in the city.

2024 chevy silverado hd 2500 duramax turbo diesel high country mpg highway loop

The refreshed 2024 Chevy Silverado HD gets a second generation of the L5P 6.6-liter turbo-diesel V8. The engine has been updated with the latest fuel injection, combustion, valvetrain, and turbocharger design in order to improve power and emissions. I want to find out what it’s like in the real world on efficiency.

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2024 Chevy Silverado HD

The latest Duramax V8 is rated at 470 horsepower and 975 lb-ft of torque. The engine is still mated to the 10-speed Allison-branded heavy-duty automatic transmission and a 3.42-to-1 rear axle ratio. The truck I am testing is a fully-optioned and luxurious High Country trim. The truck is equipped with a 36-gallon fuel tank in this crew cab configuration.

This is a first impromptu test as I combine some city and highway driving on this 70+ mile loop. It was a relatively windy day, and I came away fairly impressive with the refinement and efficiency of this new powertrain.

Check out the video for all the details. Also, take a look at the Ike GauntletTM – the world’s toughest towing test with this truck.