2024 6.6 Duramax Specs And Features. Detailed specs and features for the 2024 chevrolet silverado 2500hd including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain. Detailed specs and features for the 2024 gmc sierra 2500hd diesel denali ultimate including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders,.

Denali goes ultimate, at4x joins the ranks. The truck’s l5p duramax diesel engine received a substantial bump in power and torque thanks to a stout list of upgrades, including a new turbocharger, improved piston.