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 truck designed to deliver capability and comfort, especially for those who require both off-road performance and premium interior features. This model, finished in Sterling Metallic with Jet Black leather upholstery accented by Kalahari details, is powered by a 6.6L V8 engine paired with a 10-speed automatic transmission and a 4WD system. It includes a 2-speed active transfer case, the X31 Off-Road Package, and hill descent control, all designed to improve traction, durability, and control in rugged terrain.

This AT4 trim is equipped with several appearance and functional upgrades including gloss black grille elements, smoked amber roof marker lamps, and off-road high clearance steps. A power sunroof and spray-on bedliner with the GMC logo add to its utility and style. Technology features are extensive, anchored by a multicolor 15-inch diagonal head-up display and HD Surround Vision for enhanced driver awareness. The truck also includes a bed view camera, trailer camera provisions, and trailer viewing software that complement features like trailer side blind zone alert and Ultrasonic Front and Rear Park Assist.

Inside, the Sierra 2500HD AT4 emphasizes comfort and connectivity. Heated and ventilated front seats, heated second-row outboard seats, and premium floor liners with removable carpet inserts contribute to a refined interior environment. Wireless charging and wireless phone projection simplify device connectivity, while a Bose Premium 7-speaker sound system delivers high-quality audio. The infotainment system includes built-in navigation and SiriusXM with a 360L trial subscription.

Other features include OnStar services capability, rear cross traffic alert, a safety alert seat, a theft-deterrent system, keyless open and start, and a remote vehicle starter system. Convenience and usability are further enhanced by features like power sliding rear window with defogger, multiple USB charging and data ports, 120-volt power outlets in both the bed and cabin, and a universal home remote.

This truck includes both the AT4 Preferred Package and AT4 Premium Plus Package, combining functional utility with premium upgrades, and is part of Preferred Equipment Group 4SB.

As with all qualifying purchases at Walt Massey, this vehicle is covered by our 3 Day Money Back Guarantee. If the vehicle is returned within three business days of purchase (by 5 p.m. CST), in like-new condition and with under 300 miles driven, it qualifies for a full return. If driven over 300 miles, a charge of \$1.00 per mile beyond the limit will apply. This policy gives added confidence and flexibility when selecting your vehicle.


Price includes: $1000 - Buick & GMC Select Market Incremental Consumer Cash. Exp. 06/30/2025