2024 Denali Duramax Ultimate. The 2024 gmc sierra hd denali ultimate, refreshed for the 2024 model year, is gmc's most premium, luxurious and technologically advanced truck yet. 2024 gmc sierra 2500 and 3500 hd first look:
Carbuzz tested a sierra 1500 denali ultimate with the optional duramax engine, one of the few diesel trucks left on the market now that ram killed the ecodiesel and ford no longer offers the. The denali trim moves to second place in the sierra hdโs hierarchy for the 2024 model year with the introduction of the new denali ultimate trim, available for both the 2500 and 3500 models.