2026 GMC Sierra 2500 HD AT4

From the dealer

Meet the 2026 GMC Sierra 2500HD AT4, a heavy-duty pickup engineered for capability, comfort, and confidence on any terrain. - 6.6L V8 Duramax Turbodiesel engine with 470 hp and 975 lb-ft of torque - 10-Speed Automatic transmission with 4WD and 2-Speed Active Transfer Case - HD Surround Vision with Bed View Camera and Trailer Camera Provisions - Automatic Emergency Braking with Forward Collision Alert and Rear Cross Traffic Alert - Bose Premium 7-Speaker Sound System with SiriusXM and Apple CarPlay/Android Auto - Heated and Ventilated leather-appointed front seats with 10-way power adjustment - Multicolor 15 Head-Up Display with Wireless Phone Projection and Charging - Remote Vehicle Starter System with Keyless Open and Start - Power Sunroof and Power-Retractable Assist Steps - Spray-on Bedliner with GMC Logo and LED Cargo Area Lighting - Hill Descent Control and Exhaust Brake for enhanced towing control - X31 Off-Road Package with Off-Road Suspension and High Clearance Step - Ultrasonic Front and Rear Park Assist with Trailer Side Blind Zone Alert - Premium floor liners front and rear with removable carpet inserts - 20 High Gloss Black Aluminum Wheels with all-terrain capability The Sierra 2500HD AT4 delivers serious towing and hauling power with its legendary Duramax diesel engine, paired with an intelligent 10-speed transmission that maximizes efficiency and control. Whether you're managing job-site demands or weekend adventures, this truck responds with the durability and performance you expect from GMC's heavy-duty platform. Inside the cabin, you'll find a commanding driving position elevated above the road, offering superior visibility enhanced by the HD Surround Vision system and available camera technology. The heated and ventilated leather seats adjust through a full range of motion, while the wireless charging and smartphone integration keep you connected on long drives. Premium audio from Bose ensures entertainment quality throughout every journey. The AT4 trim combines rugged capability with refined appointments. The gloss black grille, LED marker lamps, and power-retractable assist steps establish a strong visual presence, while the spray-on bedliner protects your cargo investment. The X31 Off-Road Package adds genuine terrain-tackling features, including hill descent control and an off-road-tuned suspension for when the pavement ends. Safety technology is comprehensive throughout the Sierra 2500HD. Automatic emergency braking, lane departure warning, and trailer blind zone alerts work together to help protect you and your cargo. The advanced brake system, including ABS and dual front impact airbags, provides confidence in emergency situations and everyday driving alike. This truck represents a significant investment in capability and longevity. With only 10 miles on the odometer, it arrives in pristine condition, ready to be broken in during the work or adventures you have planned. The combination of diesel efficiency, advanced technology, and genuine off-road aptitude makes the Sierra 2500HD AT4 a complete solution for demanding drivers. 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