2024 Gmc Sierra 2500hd Denali Specs. Detailed specs and features for the 2024 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. See the complete list of 2024 gmc sierra hd updates, changes,.

Detailed specs and features for the 2024 gmc sierra 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. Denali ultimate hd trucks feature a standard powertrain upgrade, receiving the powerful 6.6l v8 l5p duramax diesel engine.