2025 Sierra Denali Hd Towing Capacity. For model year 2025, the sierra 2500 hd can tow up to 22,500 pounds, an. This means on a 2025 gmc sierra.
Detailed specs and features for the 2025 gmc sierra 2500hd diesel denali ultimate. * and an available max towing capacity of up to 36,000 lbs.