2025 Gmc Sierra 2500hd Denali Ultimate Towing Capacity. Gmc's heavy hauler, the sierra hd pickup with the diesel engine, is rated to tow up to 22,500 pounds conventionally or 36,000 with a gooseneck hitch fitted. With the grunt of the [available] duramax diesel engine, the truck can propel itself up and over just about any obstacle you might reasonably expect to encounter in a hypothetical ranch.

The 2025 sierra 2500 ranges in power from the pro with 401 horsepower to the denali ultimate with 470 horsepower. 2025 gmc sierra 2500 hd towing capacity & payload rating with the 2025 sierra 2500 hd engines revealed, we know the gas v8 can haul up to 16,000.