2024 Duramax Gmc Denali Specs. The 2024 sierra 2500 hd crew cab ranges in power from the pro with 401 horsepower to the denali ultimate with 470 horsepower. Detailed specs and features for the 2024 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more.
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