New 2025 GMC Sierra 2500HD AT4

Description for 2025 GMC Sierra 2500HD AT4 Truck

The 2025 GMC Sierra 2500HD AT4 is built for those who need serious towing and hauling ability with premium comfort and advanced technology. Under the hood, it carries the Duramax 6.6L V8 turbodiesel engine paired with a 10-speed automatic transmission, delivering substantial torque for heavy-duty work. The 4WD system is enhanced with a 2-speed active transfer case and the X31 Off-Road Package, which equips the truck for rough terrain with features like hill descent control and off-road high clearance steps. The Gooseneck/5th Wheel Prep Package expands towing versatility for larger trailers.

Its exterior combines function and style with a gloss black header grille, grille insert bars, deep-tinted glass, smoked amber roof marker lamps, and LED cargo area lighting for night visibility. A spray-on bedliner with the GMC logo protects the bed, while rear wheelhouse liners help guard against road debris. The bed-mounted 120-volt outlet provides power for tools or accessories. The AT4 trim also incorporates the Technology Package, which includes a 15-inch multicolor head-up display, HD Surround Vision, and a bed view camera with trailer camera provisions for improved situational awareness.

Inside, the cabin blends rugged design with luxury. Jet Black leather seating with Kalahari accents gives a premium feel, while heated and ventilated front seats and heated second-row outboard seats enhance year-round comfort. The floor-mounted center console provides organized storage, and both front and rear premium floor liners with removable carpet inserts help protect interior surfaces. A power sunroof adds openness to the interior.

Technology and connectivity are strong points in the AT4. The Bose premium 7-speaker audio system offers immersive sound, and wireless Apple CarPlay and Android Auto are supported through wireless phone projection. Wireless charging keeps devices powered without clutter, and multiple USB portsincluding charge-only and charge/data portsare positioned throughout the cabin. Keyless open and start, along with a remote vehicle starter system, add everyday convenience.

Safety is addressed with systems such as rear cross traffic alert, trailer side blind zone alert, ultrasonic front and rear park assist, a safety alert seat, and the rear camera mirror. The Sierras trailering technology also includes trailer viewing software, making it easier to monitor cargo and surroundings while towing.

The 2025 GMC Sierra 2500HD AT4 is covered by the Walt Massey 3 Day Money Back Guarantee. This program allows an exchange if the vehicle is returned within three business days before 5 p.m. CST, in like-new condition, and with fewer than 300 miles driven. If the mileage exceeds 300 miles, a \$1.00 per mile fee applies for the excess. This guarantee provides added peace of mind for buyers looking to ensure the truck meets their needs.


Price includes: $1000 - Buick & GMC Consumer Cash Program. Exp. 09/02/2025