The 2025 GMC 3500 Denali Ultimate is a heavy-duty pickup truck that offers impressive power, capability, and luxury. It is the top-of-the-line model in the GMC 3500 series and is designed to meet the needs of demanding drivers who require a truck that can handle tough jobs while providing a comfortable and refined driving experience.
The 2025 GMC 3500 Denali Ultimate comes standard with a powerful 6.6-liter Duramax turbo-diesel V8 engine that produces 450 horsepower and 950 lb-ft of torque. This engine is paired with a 10-speed Allison automatic transmission that provides smooth and efficient shifting. The truck also features a four-wheel drive system with a locking rear differential, which ensures maximum traction in all conditions.