2024 Gmc Denali Ultimate 2500hd. 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,. View local inventory and get a quote from a dealer.
February 23, 2023 1:08 pm. With a sticker price nearing $100k, the 2024 gmc sierra 2500hd denali ultimate is the most extravagant truck we’ve ever driven.