New 2025 GMC Sierra 2500HD Denali Ultimate

Description for 2025 GMC Sierra 2500HD Denali Ultimate Truck

The 2025 GMC Sierra 2500HD Denali Ultimate blends heavy-duty performance with luxury-grade refinement, offering advanced trailering capabilities, off-road readiness, and an upscale interior experience. Designed for demanding work and high-comfort travel, this configuration is equipped with the Duramax 6.6L V8 turbodiesel engine paired with a 10-speed automatic transmission, delivering substantial torque for towing and hauling. The 4WD system and 2-speed active transfer case support traction across a variety of conditions, while the X31 Off-Road Package enhances durability with features engineered for rugged terrain.

This Crew Cab model provides generous passenger space and is finished in Onyx Black with Alpine Umber full-grain leather upholstery. The cabin emphasizes premium appointments and convenience, including a floor-mounted center console, power sunroof, and a multicolor 15-inch diagonal head-up display that projects key driver information within view. Interior climate is regulated with heated and ventilated front seats, heated second-row outboard seats, and automatic climate control, while a wireless charging pad and wireless phone projection system allow for streamlined connectivity. The Bose Premium Series 12-speaker system further enhances in-cabin audio quality.

For trailering, this Sierra 2500HD Denali Ultimate is fully equipped. It includes the Gooseneck/5th Wheel Prep Package, trailer tire pressure monitor sensors, trailer side blind zone alert, and trailer camera provisions with Trailer Cam Pro and viewing software. HD Surround Vision and the bed view camera provide visibility for maneuvering with trailers or heavy cargo. Additional trailer-focused enhancements include Hitch Guidance, Hill Descent Control, and Trailer Sway Control.

Technology and safety systems on board include a suite of driver assistance tools such as Rear Cross Traffic Alert, Safety Alert Seat, Ultrasonic Front and Rear Park Assist, and a rear camera mirror with auto-dimming capability. A 120-volt power outlet is located in the bed and on the instrument panel to support tools or gear. LED smoked amber roof marker lamps, deep-tinted glass, and Vadar Chrome grille with Denali Ultimate badging contribute to the vehicles distinct exterior presence.

This trim level also includes the Technology Package and Preferred Equipment Group 5SB, which bring together advanced convenience and safety technologies. Keyless Open and Start, Remote Vehicle Starter, Universal Home Remote, and an electric rear sliding window with defogger add to daily usability. Security is enhanced with an unauthorized entry theft-deterrent system.

The 2025 Sierra 2500HD Denali Ultimate qualifies for the Walt Massey 3 Day Money Back Guarantee. This allows customers to return the vehicle to the dealership within three business days of purchase (by 5 p.m. CST) if it remains in like-new condition and has been driven fewer than 300 miles. Returns exceeding 300 miles are still accepted, with a fee of \$1.00 per additional mile applied. This policy offers added peace of mind for those making a heavy-duty truck investment.


Price includes: $500 - GM Military Cash Allowance Program. Exp. 01/02/2026