Experience the power and capability of the 2026 GMC Sierra 2500HD AT4 Crew Cab in sleek Onyx Black, designed for demanding work and off-road adventures.

Built to tackle tough jobs, this new Sierra 2500HD features a robust 8-cylinder gas engine paired with a 4x4 drivetrain, providing exceptional strength and traction in all conditions. The Crew Cab offers spacious seating for four doors, ensuring comfort for both work crews and family. Its standard bed is perfectly sized for hauling tools, equipment, or recreational gear. The bold Onyx Black exterior and matching interior create a cohesive, commanding presence on and off the road. The AT4 trim is tailored for those who need rugged performance combined with practical utility, making it ideal for contractors, tradespeople, and outdoor enthusiasts who require reliable power and durability. This Sierra 2500HD is built to handle heavy loads and challenging terrain without compromise, ensuring you stay productive and confident wherever your work or lifestyle takes you.