Experience the 2026 GMC Sierra 3500HD AT4 Crew Cab 4WD in striking Onyx Black, engineered for power, capability, and advanced technology tailored to demanding drivers.

Powered by a Duramax 6.6L Turbo-Diesel V8 engine delivering 470 hp and an impressive 975 lb-ft of torque, this heavy-duty truck is built to handle the toughest tasks with ease. The 10-speed automatic transmission and four-wheel drive system, complemented by a locking limited-slip differential, provide confident control on any terrain. The Gooseneck/5th Wheel Prep Package equips the Sierra 3500HD for serious towing needs, featuring a hitch platform and bed-mounted 7-pin trailer harness.

Step into premium comfort with heated and cooled leather bucket seats, power-adjustable driver and passenger seats with lumbar support, and seat memory for personalized settings. The AT4 Premium Plus Package adds a power sunroof, off-road high clearance steps with LED lighting, and a suite of technology including a 13.4" diagonal premium infotainment system with Google built-in apps. The Technology Package enhances safety and convenience with a rear camera mirror and a multicolour 15" diagonal head-up display.

Safety is comprehensive with automatic high beams, blind spot monitoring, cross-traffic alert, lane departure warning, front collision mitigation, and multiple airbags. Exterior features like body-colour wheel arch mouldings, black badging package, integrated tailgate step, running boards, and power-retractable assist steps combine rugged style with functionality. This Sierra 3500HD AT4 is ready to tackle work and adventure with confidence and sophistication.