Price includes all applicable manufacturer rebates and incentives, see dealer for details, qualification requirements must be met.$1000 - Buick & GMC Consumer Cash Program. Exp. 06/30/2026 Experience the unparalleled power and capability of the 2026 GMC Sierra 2500HD AT4. This exceptional heavy-duty truck is engineered to conquer any terrain, whether you're tackling demanding job sites or embarking on thrilling off-road adventures.- 6.6L V8 Diesel Turbocharged (Duramax) (B20-Diesel Compatible) (Includes (K05) Engine Block Heater) (470 hp 350.5 kW @ 2800 rpm, 975 lb-ft of torque 1322 Nm @ 1600 rpm)- AT4 Preferred Package- AT4 Premium Plus Package- Gooseneck/5th Wheel Prep Package- Preferred Equipment Group 4SB- Technology Package- X31 Off-Road PackageBoasting a Duramax 6.6L V8 Turbodiesel engine, the Sierra 2500HD AT4 delivers unrivaled performance and efficiency, with a staggering 975 lb-ft of torque to power you through the toughest jobs. Paired with a 10-speed automatic transmission and advanced 4WD system, this truck is ready to tackle any terrain with confidence and precision.Designed for the adventurous spirit, the Sierra 2500HD AT4 is equipped with a host of off-road-focused features, including an off-road suspension, skid plates, and hill descent control. The available X31 Off-Road Package further enhances the truck's capability, providing added protection and traction for your most challenging excursions.Step inside the Sierra 2500HD AT4 and experience the pinnacle of comfort and technology. Indulge in the premium Bose sound system, enjoy the convenience of wireless charging, and stay connected with the advanced infotainment system featuring Apple CarPlay and Android Auto integration. The available Technology Package takes your driving experience to new heights, with features like the multicolor 15"" head-up display and the innovative in-vehicle trailering system app.Safety is paramount in the Sierra 2500HD AT4, with a suite of advanced driver assistance technologies, including automatic emergency braking, forward collision alert, and lane departure warning. The available HD Surround Vision system and Bed View Camera provide added confidence when navigating tight spaces or towing heavy loads.Whether you're tackling demanding work or seeking the ultimate off-road adventure, the 2026 GMC Sierra 2500HD AT4 is the perfect companion. Experience the uncompromising power, capability, and technology that make this truck a true standout in its class. Visit our showroom today and let us demonstrate how the Sierra 2500HD AT4 can transform your driving experience.