Lucy Kylila

2024 Gmc Sierra 2500hd Denali Ultimate Specs. 2024 gmc sierra 2500hd and 3500hd pickup trucks equipped with the denali ultimate trim are the only truck in gmc’s lineup that come standard with the 6.6l l5p duramax diesel engine, producing 470. Find information on performance, specs, engine, safety and more.

2024 gmc sierra 2500hd and 3500hd pickup trucks equipped with the denali ultimate trim are the only truck in gmc’s lineup that come standard with the 6.6l l5p duramax diesel engine, producing 470. The sierra hd comes standard with a 6.6l gas.