Sierra Denali Ultimate 2025. 2025 gmc sierra 2500 and 3500 hd first look: As for the greasy bits, the 2025 gmc sierra hd denali ultimate cradles the 6.6l v8 l5p turbodiesel duramax engine as standard.
2025 gmc sierra 2500 denali ultimate specifications. The sierra’s short bed measures 69.9 inches with 62.9 cubic feet of storage space.
