New 2025 GMC Sierra 2500HD AT4X

Description for 2025 GMC Sierra 2500HD AT4X Truck

The 2025 GMC Sierra 2500HD AT4X is designed to deliver heavy-duty capability with a premium blend of comfort, technology, and off-road readiness. This Crew Cab configuration is powered by the renowned Duramax 6.6L V8 Turbodiesel engine, mated to a 10-speed automatic transmission and paired with a 4WD system enhanced by a 2-speed active transfer case. Together, these components make the AT4X a formidable performer for both towing and all-terrain applications.

This trim sits at the top of GMCs off-road lineup, offering luxury-level refinement alongside rugged functionality. The exterior is finished in Onyx Black and features distinctive Gloss Black grille elements, smoked amber LED roof marker lamps, and LED cargo area lighting. A power sunroof and power sliding rear window add upscale functionality and open-air versatility. Bed utility is expanded through a spray-on bedliner with GMC logo, LED lighting, and integrated trailer camera provisions. The Gooseneck/5th Wheel Prep Package and trailer-related technologiesincluding Trailer Side Blind Zone Alert, Trailer Cam Provisions with Viewing Software, Trailer Tire Pressure Monitor Sensors, and Hill Descent Controlreinforce the trucks towing specialization.

Inside, the Obsidian Rush leather interior presents a high-end environment tailored for both work and travel. Heated and ventilated front seats, heated outboard rear seats, a heated steering wheel, and dual-zone automatic climate control contribute to a comfortable cabin year-round. The floor-mounted center console and premium floor liners with removable carpet inserts provide additional functionality and ease of maintenance.

Technology is a key highlight in the AT4X trim. A 15-inch multicolor head-up display projects key information directly onto the windshield, while a 12-speaker Bose Premium Series audio system ensures high-quality sound throughout the cabin. The infotainment suite includes wireless Apple CarPlay and Android Auto via Wireless Phone Projection, a wireless charging pad, and multiple USB portsensuring seamless connectivity for all passengers. The HD Surround Vision system and Inside Rearview Auto-Dimming Camera Mirror provide enhanced visibility when maneuvering in tight or obstructed environments.

Convenience and safety features are abundant. Keyless Open and Start, push-button start, remote vehicle starter system, rain-sensing wipers, a universal home remote, and SiriusXM with 360L all support day-to-day ease. Meanwhile, driver-assistance features such as Rear Cross Traffic Alert, Ultrasonic Front and Rear Park Assist, Safety Alert Seat, and Trailer Side Blind Zone Alert enhance awareness on the road or trail.

For added practicality, the AT4X includes a 120-volt power outlet in both the bed and the instrument panel, supporting tools and equipment wherever needed. Rear wheelhouse liners and deep-tinted glass further contribute to durability and visual appeal.

As part of your vehicle purchase, this Sierra 2500HD AT4X is backed by the Walt Massey 3 Day Money Back Guarantee. If you decide within three business days that its not the right fit, you can return it to the dealership as long as the vehicle remains in like-new condition and has fewer than 300 miles driven. If it exceeds 300 miles, a fee of \$1.00 per additional mile applies. This program is designed to ensure confidence and satisfaction in your decision.

The 2025 Sierra 2500HD AT4X merges capability and luxury in a platform ready for work, off-road exploration, and everyday useall while offering advanced technology and a comprehensive safety suite.

Not all rebates may apply. Some rebates are not compatible with other rebates. Offers are subject to change. See dealer for details. Price includes: $500 - GM Military Cash Allowance Program. Exp. 01/02/2026