2024 Gmc Sierra 3500hd Denali Ultimate.  — the sierra hds get a revised front fascia with newly available led headlights and taillights with sequential turn signals.  — 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.

 — the 2024 gmc sierra 2500hd denali ultimate carries its 8,346 pounds of mass to 60 mph in a shockingly quick 6.5 seconds. Sierra 3500 hd denali ultimate.