New 2025 GMC Sierra 2500HD Denali Ultimate

Description for 2025 GMC Sierra 2500HD Denali Ultimate Truck

The 2025 GMC Sierra 2500HD Denali Ultimate represents one of the most feature-rich and capability-oriented heavy-duty trucks in the GMC lineup. Built for both premium comfort and rugged utility, this Crew Cab configuration is powered by a Duramax 6.6L V8 turbodiesel engine paired with a 10-speed automatic transmission and 4WD. This drivetrain provides ample towing strength and robust torque, making it well-suited for hauling, trailering, and off-road travel alike.

Equipped with the X31 Off-Road Package, this Sierra includes enhancements such as hill descent control, off-road suspension tuning, and skid plates, which improve its performance on challenging terrain. Complementing its utility, the truck comes factory-prepared with a Gooseneck/5th Wheel Prep Package and trailer-centric technologies such as Trailer Cam Provisions, Trailer Side Blind Zone Alert, and Trailer Tire Pressure Monitor Sensors. These features collectively aid in towing large loads safely and confidently.

Inside, the Denali Ultimate trim emphasizes high-end refinement. The cabin is adorned in Alpine Umber leather and features a power sunroof, floor-mounted center console, and heated and ventilated front seats. Rear outboard seats are also heated, and the front seats offer power adjustability for both driver and passenger. Interior climate is managed through advanced automatic controls, while entertainment and connectivity are delivered by the Bose Premium Series 12-speaker system and a comprehensive infotainment suite that includes SiriusXM with 360L and wireless Apple CarPlay and Android Auto.

Advanced technology is further represented by the Multicolor 15" diagonal Head-Up Display, HD Surround Vision camera system, and a rearview auto-dimming mirror with camera functionality. The inclusion of a Technology Package ensures access to some of GMCs most modern innovations, while key convenience features such as a wireless charging pad, universal home remote, remote vehicle start, and power sliding rear window enhance daily usability.

The exterior design is marked by premium elements like the Signature Denali Ultimate grille in Vader Chrome, smoked amber roof marker lamps, and deep-tinted glass. Practical utility is addressed with a spray-on bedliner featuring the GMC logo, LED cargo area lighting, and dual 120-volt power outlets (bed-mounted and instrument panel). Safety systems include Rear Cross Traffic Alert, Safety Alert Seat, Ultrasonic Park Assist, and an Unauthorized Entry Theft-Deterrent System.

This model is equipped with a 2-Speed Active Transfer Case and comes with multiple USB ports throughout the cabin for both charging and data use. The inclusion of the Preferred Equipment Group 5SB ensures a full suite of features that support both luxurious driving and demanding worksite needs.

For those considering their purchase, the Walt Massey 3 Day Money Back Guarantee offers added peace of mind. If the Sierra 2500HD Denali Ultimate is returned within three business days in like-new condition and with fewer than 300 miles driven, a full exchange is available. For vehicles driven over 300 miles, a \$1.00 per mile charge applies. This guarantee helps ensure satisfaction and confidence in your vehicle decision.

Not all rebates may apply. Some rebates are not compatible with other rebates. Offers are subject to change. See dealer for details. Price includes: $500 - GM Military Cash Allowance Program. Exp. 01/02/2026