The 2025 GMC Sierra 2500HD Denali Ultimate is a heavy-duty pickup truck that combines power, luxury, and advanced technology. It is the top-of-the-line model in the Sierra 2500HD lineup and offers a range of features that make it an ideal choice for those who need a truck that can handle tough jobs while also providing a comfortable and refined driving experience.
The Sierra 2500HD Denali Ultimate is powered by a 6.6-liter Duramax turbo-diesel V8 engine that produces 445 horsepower and 910 lb-ft of torque. This engine is paired with a 10-speed Allison automatic transmission and a four-wheel-drive system. The truck has a maximum towing capacity of 36,000 pounds and a maximum payload capacity of 7,442 pounds.