2026 GMC Sierra 2500 HD AT4

From the dealer

The 2026 GMC Sierra 2500HD AT4 stands ready to deliver the capability and refinement your work and lifestyle demand. - Duramax 6.6L V8 Turbocharged Diesel engine with 470 hp and 975 lb-ft of torque - 10-Speed Automatic transmission with 4WD - Bose Premium 7-Speaker Sound System with SiriusXM - Apple CarPlay and Android Auto integration - Multicolor 15 Diagonal Head-Up Display - HD Surround Vision with Bed View Camera - Heated and Ventilated front seats with memory functions - Wireless Phone Projection and Charging - Max Trailering Package with Gooseneck/5th Wheel Prep - Automatic Emergency Braking and Front Pedestrian Braking - Rear Cross Traffic Alert and Trailer Side Blind Zone Alert - Hill Descent Control with Exhaust Brake - AT4 Premium Plus Package with Off-Road Suspension - Power Sunroof with Spray-on Bedliner - Remote Vehicle Starter with Keyless Open and Start This heavy-duty pickup combines power and precision engineering with the diesel efficiency you need for demanding work. The Duramax engine delivers commanding torque for towing and hauling, while the fully automatic transfer case with hill descent control gives you control in any terrain. Whether navigating challenging job sites or managing daily hauling tasks, this truck provides the confidence that comes with proven diesel capability. The AT4 trim elevates your experience with premium materials and thoughtful technology. Perforated leather seats with heating and ventilation keep you comfortable on long drives, while memory settings learn your preferences. The cabin surrounds you with refined appointments that make time behind the wheel more enjoyable, not just functional. Technology integrates seamlessly into your work and travel. The head-up display keeps critical information in your line of sight, while the multiple camera systems—including surround vision and trailer cameras—help you navigate tight spaces and manage towing situations with clarity. Wireless connectivity keeps you linked to what matters without the hassle of cables. Safety features work quietly in the background to protect you. Forward collision alert, automatic emergency braking, and lane departure warning provide additional assurance during daily driving. The comprehensive suite of airbags and stability systems reflects GMC's commitment to protecting you and your passengers. This Sierra 2500HD AT4 represents a truck built for those who expect both performance and refinement. With meticulous engineering throughout, this vehicle is ready to handle whatever you ask of it. 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