New 2025 GMC Sierra 2500HD Denali Ultimate

Description for 2025 GMC Sierra 2500HD Denali Ultimate Truck

The 2025 GMC Sierra 2500HD Denali Ultimate represents the top-tier trim of GMCs heavy-duty lineup, offering a combination of premium refinement and high-performance capabilities designed for towing, hauling, and all-terrain versatility. Powered by the Duramax 6.6L V8 turbodiesel engine paired with a 10-speed automatic transmission and equipped with four-wheel drive, this Sierra delivers the strength and control required for heavy-duty demands. The two-speed active transfer case and the X31 Off-Road Package add additional support for off-road and low-traction environments, incorporating features like hill descent control and off-road suspension tuning.

This Denali Ultimate configuration also includes the Gooseneck/5th Wheel Prep Package, trailer side blind zone alert, trailer tire pressure monitor sensors, trailer camera provisions, and trailer viewing software, allowing drivers to tow with greater visibility and confidence. The bed view camera and HD Surround Vision system contribute further to safer trailering and low-speed maneuvering.

Inside the crew cab, the Sierra 2500HD Denali Ultimate features Alpine Umber full-grain leather upholstery, a floor-mounted center console, and a multicolor 15-inch diagonal head-up display. The cabin integrates advanced technologies such as a Bose Premium Series 12-speaker sound system, wireless phone projection for Apple CarPlay and Android Auto, and a wireless charging pad. Rear-seat occupants also benefit from heated outboard seating, while front passengers are provided with both heated and ventilated seating. A power sunroof and power sliding rear window offer increased comfort and ventilation options.

Additional convenience features include multiple USB ports throughout the cabin, a 120-volt outlet in the bed and another on the instrument panel, rain-sensing wipers, and LED lighting in the cargo area. The spray-on bedliner with GMC logo and rear wheelhouse liners enhance long-term durability and utility. Safety systems such as the safety alert seat, rear cross traffic alert, ultrasonic front and rear park assist, and OnStar Services capability further support driver awareness and response.

The distinctive Signature Denali Ultimate grille in Vader Chrome visually sets this model apart, emphasizing its upscale character while remaining fully equipped for demanding work. Other aesthetic details like LED smoked amber roof marker lamps and deep-tinted glass provide both form and function.

As with all qualifying vehicles at Walt Massey, this Sierra 2500HD Denali Ultimate is backed by the Walt Massey 3 Day Money Back Guarantee. Buyers may return the vehicle within three business days of purchaseprovided it remains in like-new condition and has been driven less than 300 milesto receive an exchange. If the mileage exceeds the 300-mile limit, a charge of \$1.00 per additional mile applies. This policy provides added peace of mind to ensure your satisfaction with your purchase.

Not all rebates may apply. Some rebates are not compatible with other rebates. Offers are subject to change. See dealer for details. Price includes: $1000 - Buick & GMC Select Market Incremental Consumer Cash. Exp. 08/04/2025 $500 - GM Military Cash Allowance Program. Exp. 01/02/2026