Wireless Apple CarPlay & Wireless Android Auto | Duramax® 6.6L V8 Turbo Diesel | AT4 Premium Plus Package | GMC MultiPro Tailgate | 15 Diagonal Head-Up Display | 13.4 GMC Premium Infotainment | Bose® Premium Speakers | 20 High Gloss Black Aluminum Wheels The 2026 GMC Sierra 3500 AT4 Crew Cab 4WD, finished in Sterling Metallic with a specialized Jet Black/Kalahari interior, is a high-performance heavy-duty truck designed for both elite towing and off-road capability. This powerhouse is driven by the Duramax® 6.6L V8 Turbo Diesel engine paired with a 10-speed automatic transmission. To master any terrain, it features a 2-speed active electronic Autotrac transfer case, an automatic locking rear differential, and Digital Variable Steering. The AT4 Premium Plus Package significantly enhances luxury and utility, adding a power sunroof, Rear Camera Mirror, and a multicolor 15 diagonal Head-Up Display. The interior offers a refined experience with heated and ventilated front seats, heated second-row outboard seats, and Dual-Zone Automatic Climate Control. Technology is at the forefront with the 13.4 GMC Premium Infotainment system featuring Google Built-In, a 12.3 digital Driver Information Centre, and Wireless Charging. Capability is built into every detail, from the GMC MultiPro Tailgate and factory spray-on bedliner to the Off-Road High Clearance Steps. Trailering is made effortless with HD Surround Vision, Bed View Camera, and the In-Vehicle Trailering App with Hitch View. Safety is comprehensive, featuring Adaptive Cruise Control, Trailer Side Blind Zone Alert, and Automatic Emergency Braking. With 20 High Gloss Black aluminum wheels and animated LED projector headlamps, this Sierra 3500 AT4 delivers professional-grade strength with an unmistakable presence. Stock #T4227374 AMVIC LICENSED DEALER