New 2025 GMC Sierra 2500HD AT4

Description for 2025 GMC Sierra 2500HD AT4 Truck

The 2025 GMC Sierra 2500HD AT4 is a heavy-duty pickup designed for off-road capability while offering upscale comfort and advanced trailering technology. As part of GMCs off-road-oriented AT4 lineup, this model combines rugged equipment with a host of premium features designed for both work and recreational versatility.

Powered by a 6.6L V8 engine paired with a 10-speed automatic transmission, the Sierra 2500HD AT4 delivers strong towing capacity and torque, enhanced further by the inclusion of a 2-speed active transfer case and the X31 Off-Road Package. This off-road suite includes features such as hill descent control, skid plates, and upgraded suspension tuning, allowing the truck to handle rougher terrains with confidence. The Gooseneck/5th Wheel Prep Package provides integrated support for heavy-duty towing applications.

This four-wheel drive crew cab model is finished in Onyx Black and equipped with a Jet Black interior highlighted by Kalahari accents and leather-appointed seating. Front and rear outboard seats are heated, while the front seats are also ventilated for added comfort in all climates. The power sunroof, rear sliding window with defogger, and deep-tinted glass enhance comfort and visibility.

Inside, the Sierra AT4 integrates a wide range of advanced technology features. A 15-inch multicolor head-up display projects critical information directly into the driver's line of sight. The HD Surround Vision system, Bed View Camera with trailer camera provisions, Trailer Side Blind Zone Alert, and Trailer Viewing Software provide a comprehensive suite of tools for safe trailering and maneuvering. The Technology Package also includes an auto-dimming rearview camera mirror and wireless device charging. Connectivity is handled through GMCs infotainment system with wireless phone projection and SiriusXM with 360L, all enhanced by a Bose Premium 7-speaker audio system.

Convenience features include keyless open and start, a push-button ignition system, remote vehicle start, and a universal home remote. The cabin is well-appointed with a floor-mounted center console, multiple USB charging ports, and premium floor liners with removable carpet inserts. Storage and utility are enhanced with a spray-on bedliner featuring the GMC logo, LED cargo area lighting, and Off-Road High Clearance Steps.

Safety is also a strong focus. The AT4 includes Rear Cross Traffic Alert, Ultrasonic Front and Rear Park Assist, and a Safety Alert Seat. The Theft-Deterrent System with unauthorized entry detection adds another layer of protection when the truck is parked.

This Sierra 2500HD AT4 is covered by the Walt Massey 3 Day Money Back Guarantee. If the vehicle is returned within three business days in like-new condition and with under 300 miles driven, customers may exchange it with no penalty. If the vehicle exceeds 300 miles, a fee of \$1.00 per mile will apply. This program offers added assurance for those seeking confidence in their purchase decision.

Overall, the 2025 Sierra 2500HD AT4 blends trail-ready durability, advanced towing tools, and premium comfort features for drivers who demand capability and refinement in a single package.


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