New 2025 GMC Sierra 2500HD AT4

Description for 2025 GMC Sierra 2500HD AT4 Truck

The 2025 GMC Sierra 2500HD AT4 is a heavy-duty crew cab pickup engineered for both rugged performance and modern comfort. With its off-road capability, advanced trailering technologies, and an upscale interior, this configuration strikes a balance between utility and refinement.

Powering the Sierra 2500HD AT4 is a 6.6-liter Duramax V8 turbodiesel engine paired with a 10-speed automatic transmission. This powertrain is optimized for towing and heavy loads while also providing smooth delivery of torque through its 4WD drivetrain. It includes a 2-speed active transfer case and is equipped with the X31 Off-Road Package, giving it improved off-road suspension, skid plates, and hill descent control to enhance traction and control in difficult terrain.

This truck also comes with the Gooseneck/5th Wheel Prep Package and Trailer Camera Provisions with trailer viewing software. These systems support serious towing, whether it's for work or recreational use. Trailer Side Blind Zone Alert and Rear Cross Traffic Alert provide added safety when maneuvering with or without a trailer. HD Surround Vision and a Bed View Camera give a comprehensive view of surroundings and cargo, while Ultrasonic Front and Rear Park Assist adds precision in tight areas.

The AT4 Premium Plus Package and AT4 Preferred Package introduce several high-end comfort and convenience features. The cabin features Jet Black leather with Kalahari accents, ventilated and heated front seats, and heated second-row outboard seats. A power sunroof and rear sliding window with defogger provide ventilation and light, while the floor-mounted center console and premium floor liners help keep the interior functional and clean.

Technology integration includes a multicolor 15-inch diagonal Head-Up Display, a wireless charging pad, wireless Apple CarPlay and Android Auto, and a premium Bose 7-speaker audio system. The infotainment system is SiriusXM with 360L capable and OnStar Services-ready, providing both entertainment and connectivity.

The exterior is styled with practical and distinctive design cues such as smoked amber roof marker lamps, a gloss black grille, LED cargo area lighting, deep-tinted glass, and Off-Road High Clearance Steps. Spray-on bedliner with GMC logo and rear wheelhouse liners help protect against wear. The included 120-volt outletsboth bed-mounted and in the cabinenhance its functionality as a mobile workspace.

Safety features include the Safety Alert Seat, Theft-Deterrent System, and push button start with remote vehicle start capability. Rain-sensing wipers, power front passenger windows with express up/down, and a universal home remote add to the convenience of day-to-day driving.

Customers purchasing this truck from Walt Massey also benefit from the 3 Day Money Back Guarantee. If you return the vehicle to the dealership within three business days before 5 p.m. CST in like-new condition and with fewer than 300 miles driven, you can exchange it. If the mileage exceeds 300 miles, a charge of \$1.00 per mile applies. This policy gives buyers added confidence and peace of mind in their purchase decision.

The 2025 GMC Sierra 2500HD AT4 is built for demanding tasks but doesn't compromise on comfort, safety, or technologymaking it well-suited for drivers who need a capable and refined heavy-duty pickup.

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