2026 GMC Sierra 2500 HD AT4

From the dealer

This 2026 GMC Sierra 2500HD AT4 is built for those who demand capability without compromise, delivering the power and sophistication you need for serious work or premium hauling. - 6.6L Duramax V8 Turbodiesel with 470 hp and 975 lb-ft of torque - 10-Speed Automatic transmission with 4WD - Bose Premium 7-Speaker Sound System with SiriusXM - Heated and ventilated perforated leather front seats - Multicolor 15 Head-Up Display with HD Surround Vision - Apple CarPlay and Android Auto compatibility - Power sunroof and power-retractable assist steps - Spray-on bedliner with GMC logo - AT4 Preferred and AT4 Premium Plus Packages - X31 Off-Road Package with Hill Descent Control - Gooseneck/5th Wheel Prep Package - Automatic Emergency Braking and Front Pedestrian Braking - Rear Cross Traffic Alert and Trailer Side Blind Zone Alert - Ultrasonic front and rear park assist - Wireless charging and wireless phone projection The Duramax turbodiesel engine is engineered for serious torque delivery, providing 975 lb-ft at just 1600 rpm. This means you get responsive power whether you're towing a trailer, hauling a full bed load, or navigating tough terrain. The engine block heater and B20-diesel compatibility add practical versatility for year-round operation and fuel flexibility. Technology is seamlessly integrated throughout this Sierra. The 15-inch Head-Up Display keeps essential driving information at eye level, while the Bose audio system elevates every drive with premium sound quality enhanced by SiriusXM satellite radio. Apple CarPlay and Android Auto ensure your smartphone integrates naturally with the vehicle's infotainment system, keeping you connected safely while driving. Safety and convenience features work together to make this truck work harder for you. The HD Surround Vision system, Trailer Side Blind Zone Alert, and Rear Cross Traffic Alert provide visibility from multiple angles. Heated and ventilated leather seats keep you comfortable in any season, while the power sunroof adds an open-air dimension to the cabin. The wireless charging pad and multiple USB ports throughout mean your devices stay powered throughout the day. The AT4 Package speaks to capability and refined styling. Combined with the X31 Off-Road Package featuring Hill Descent Control, this Sierra is ready for genuine off-road conditions while maintaining the premium comfort you expect from the AT4 designation. The spray-on bedliner protects your cargo bed, while the gooseneck/fifth-wheel prep package accommodates serious towing solutions. Premier Cadillac Buick GMC of Carlsbad is proud to serve drivers throughout Carlsbad, Oceanside, Encinitas, San Marcos, Vista, Escondido, Rancho Santa Fe, Del Mar, Solana Beach, Cardiff-by-the-Sea, La Costa, Bressi Ranch, Rancho Bernardo, Poway, Fallbrook, Bonsall, Valley Center, Camp Pendleton, Carmel Valley, and all of North County San Diego. Whether you're shopping for a new Cadillac Escalade, LYRIQ, Optiq, XT5, XT6, Buick Envista, Encore GX, Enclave, GMC Sierra 1500, Sierra HD, Yukon, Yukon XL, Hummer EV, Canyon, Acadia, Terrain, or a quality pre-owned vehicle, our experienced team is committed to delivering a transparent, pressure-free buying experience. Sales 760-653-0332