This 2026 GMC Sierra 2500HD SLT arrives with the capability and refinement you expect from a premium heavy-duty truck, powered by the legendary Duramax 6.6L V8 Turbodiesel engine paired with a 10-speed automatic transmission and 4WD to handle any terrain with confidence.- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft of torque- Power sunroof with moonroof styling- GMC MultiPro Tailgate with six functional load and access features- Spray-on pickup bedliner with GMC logo- SLT Convenience Package with ventilated front seats and Bose Premium Audio System- SLT Preferred Package including rear heated seats and adaptive cruise control- Sierra HD Pro Safety Plus Package with HD surround vision and trailer safety features- 20" bright face wheels with dark painted pockets and all-terrain tires- 6" chrome rectangular assist step with all-weather floor liners- Heated front and rear seats with leather-appointed trim- Wireless charging and Apple CarPlay/Android Auto compatibility- Advanced safety suite with automatic emergency braking and lane departure warning- Remote vehicle starter and keyless open and start functionalityThe SLT trim delivers substantial comfort features designed for both work and leisure. Ventilated front seats keep you cool during demanding conditions, while heated seats and a heated steering wheel ensure warmth in cold weather. The Bose Premium Audio System provides rich sound quality throughout your drives, complemented by SiriusXM satellite radio with a trial subscription. Dual-zone automatic temperature control and an engine block heater add practical convenience year-round.Technology integration is seamless with Apple CarPlay and Android Auto wireless projection, allowing you to stay connected safely. The universal home remote, remote vehicle starter, and push-button start enhance everyday functionality. Navigation and infotainment come through the premium GMC system, while OnStar services provide emergency assistance and vehicle management capabilities.Safety systems work proactively to protect you and your passengers. The Sierra HD Pro Safety Plus Package includes trailer side blind zone alert, rear cross traffic alert, and HD surround vision with a bed view camera. Front and rear park assist with ultrasonic sensors helps prevent accidents during low-speed maneuvers. Forward collision alert and automatic emergency braking provide additional layers of protection, while the safety alert seat offers tactile warnings.Truck utility shines through thoughtful design elements. The GMC MultiPro Tailgate opens multiple ways for loading flexibility, while the spray-on bedliner protects your cargo area. Four-wheel disc brakes with an exhaust brake deliver strong stopping power. A 220-amp alternator and heavy-duty 80-amp battery ensure reliable power delivery, while the 2-speed active transfer case provides refined 4WD control.This Sierra 2500HD combines the work-ready capability of a diesel powerhouse with the refined appointments of a premium cabin. The black exterior with chrome accents presents an imposing presence, while comfortable seating for five and abundant technology keep every journey enjoyable. Whether tackling professional demands or weekend adventures, this truck delivers the performance and luxury you deserve.