This 2026 GMC Sierra 2500HD AT4 delivers serious capability with a Duramax 6.6L V8 Turbodiesel engine and 10-speed automatic transmission, engineered for demanding work and premium towing performance. The white exterior and 4WD powertrain create a commanding presence, while the AT4 trim ensures you're equipped for both on-road refinement and off-road readiness. With approximately 8,437 miles annually, this truck shows responsible ownership and comes well-appointed for a comfortable cab experience.Key features include:- Duramax 6.6L V8 Turbodiesel with turbocharger and 220-amp alternator- Engine block heater and 2-speed active transfer case- 20-inch high-gloss black aluminum wheels with 4-wheel disc brakes- Off-road suspension with hill descent control and exhaust brake- Premium Bose 7-speaker sound system with SiriusXM 360L and Apple CarPlay/Android Auto- Heated and ventilated power front seats with 10-way drivers-side lumbar adjustment- Wireless phone projection and wireless charging pad- HD surround vision cameras with trailer viewing provisions- Automatic emergency braking with front pedestrian braking and lane departure warning- Ultrasonic front and rear park assist with rear cross-traffic alertThe cabin reflects quality craftsmanship with perforated leather seating, heated rear seats, dual-zone climate control, and a power rear window. Safety technology includes forward collision alert, trailer side blind zone alert, and OnStar emergency communication. The AT4 package adds all-terrain capability with an off-road suspension setup designed to handle challenging terrain while maintaining highway composure.This Sierra 2500HD AT4 represents a full-featured heavy-duty truck ready for your next adventure or workday. Visit our showroom to experience the commanding presence and refined capability firsthand.
