New 2025 GMC Sierra 2500HD AT4

Description for 2025 GMC Sierra 2500HD AT4 Truck

The 2025 GMC Sierra 2500HD AT4 is designed to provide serious off-road performance and towing capability, while delivering premium interior amenities and advanced technology features for both work and everyday use. With a focus on rugged refinement, this heavy-duty pickup balances trail-ready hardware with comfort and connectivity.

Under the hood, the Sierra 2500HD AT4 is powered by a Duramax 6.6L V8 turbodiesel engine, paired with a 10-speed automatic transmission and a 4WD system featuring a 2-speed active transfer case. This combination supports high torque output for towing, hauling, and navigating rough terrain. The included X31 Off-Road Package enhances off-pavement capability with features like hill descent control, off-road suspension tuning, and skid plates. The Gooseneck/5th Wheel Prep Package, integrated trailer brake controller, Trailer Side Blind Zone Alert, and Trailer Cam Provisions further reinforce the Sierra HDs suitability for demanding trailering needs.

The AT4 trim features distinctive exterior styling elements including Gloss Black header grille bars, smoked amber LED roof marker lamps, and 20-inch high-gloss black aluminum wheels. Deep-tinted glass, rear wheelhouse liners, and LED cargo area lighting add functional and aesthetic enhancements, while the spray-on bedliner with the GMC logo protects the truck bed from wear. The available Off-Road High Clearance Step and bed-mounted 120-volt power outlet add utility for jobsite or recreational use.

Inside the crew cab, the cabin is finished in Jet Black leather with Kalahari accents and is equipped with both heated and ventilated front seats, heated second-row outboard seats, and a floor-mounted center console. The 15-inch multicolor head-up display and Bose premium 7-speaker sound system are part of the Technology Package, which also includes HD Surround Vision and a bed view camera. Wireless Apple CarPlay and Android Auto, wireless charging, and a large digital driver display keep drivers connected and informed without added clutter. USB ports throughout the cabin, including charge-only and data/charge ports, offer versatile power access.

Convenience features include a power sunroof, keyless open and start, push-button start, remote vehicle starter system, and a power sliding rear window with defogger. The Universal Home Remote allows for integration with garage and security systems. Safety is prioritized through features like the Safety Alert Seat, Lane Departure Warning, Rear Cross Traffic Alert, Ultrasonic Front and Rear Park Assist, and an unauthorized entry theft-deterrent system.

With the AT4 Preferred and AT4 Premium Plus Packages included, this configuration enhances luxury and capability with an array of premium upgrades. These packages bring together the most sought-after off-road equipment and in-cabin technology, making this model well-equipped for a broad range of tasks.

For additional peace of mind, every vehicle purchased from Walt Massey comes with a 3 Day Money Back Guarantee. If the vehicle is returned within three business days in like-new condition and with fewer than 300 miles driven, youre eligible for a full return. Vehicles driven more than 300 miles are still returnable, but with a fee of \$1.00 per additional mile.

The 2025 GMC Sierra 2500HD AT4 delivers a blend of serious work capacity and refined amenities, making it a strong choice for those needing durability and off-road readiness without sacrificing comfort or advanced features.


Price includes: $1000 - Buick & GMC Select Market Incremental Consumer Cash. Exp. 08/04/2025