The 2025 GMC Sierra 3500HD Denali is a heavy-duty pickup truck that provides a mix of energy, functionality, and luxurious. It’s the top-of-the-line mannequin within the Sierra lineup and is designed for demanding jobs and leisure actions.
The Sierra 3500HD Denali is powered by a 6.6-liter Duramax V8 turbodiesel engine that produces 445 horsepower and 910 lb-ft of torque. This engine is paired with a 10-speed Allison computerized transmission. The truck has a most towing capability of 36,000 kilos and a most payload capability of seven,388 kilos.