2024 Gmc Sierra 2500hd Denali Ultimate Speed. View local inventory and get a quote from a dealer.  — 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,.

New 2025 gmc sierra 1500 denali ultimate.  — the 2024 gmc sierra 2500hd denali ultimate carries its 8,346 pounds of mass to 60 mph in a shockingly quick 6.5 seconds.