13.4 GMC Infotainment Screen | AT4 Premium Plus Package | 15 Head-Up Display | Power Sunroof | Bose Premium Speakers | Rear Camera Mirror | Gooseneck/5th Wheel Prep Package | GMC MultiPro Tailgate The 2026 GMC Sierra 3500HD AT4 Crew Cab Standard Bed 4WD stands as an absolute powerhouse of heavy-duty capability and premium refinement, exhibiting an authoritative profile dressed in a sleek Sterling Metallic exterior and a custom Jet Black leather interior with Kalahari accents. Beneath its sculpted hood lies the legendary Duramax 6.6L V8 Turbo Diesel engine, pushing massive torque through a heavy-duty 10-speed automatic transmission. Masterfully engineered for elite towing and severe Canadian climates, this truck features a 3.42 rear axle ratio, an impressive 5,488 kg (12,100 lb) GVWR, a 2-speed active electronic Autotrac transfer case, digital variable steering, and an automatic locking rear differential. It comes completely work-ready with a factory spray-on bedliner, LED cargo bed lighting, a 120V AC bed outlet, winter-ready floor liners, rear wheelhouse liners, the versatile six-position GMC MultiPro Tailgate, and the factory-installed Gooseneck/5th Wheel Prep Package. The cavernous interior functions as a high-end command center, heavily upgraded by the premium AT4 Premium Plus Package. The driver and front passenger enjoy heated and ventilated 10-way power-adjustable bucket seats with memory settings, while the rear outboard passengers receive heated seating. Advanced tech integration is front and center, headlined by a 13.4-inch GMC Premium Infotainment touchscreen with Google Built-In navigation, a 12.3-inch digital Driver Information Centre, wireless Apple CarPlay, wireless Android Auto, and a wireless smartphone charging pad. The driving experience is further elevated by an interactive 15-inch multi-colour Head-Up Display, a Rear Camera Mirror, a Bed View Camera, a Bose premium sound system, a power sunroof, a power-sliding rear window, and power-retractable assist steps with LED perimeter lighting. Absolute peace of mind is guaranteed on any journey via the Sierra HD Pro Safety suite, supplying proactive driver assistance technologies such as HD Surround Vision, Adaptive Cruise Control, Trailer Side Blind Zone Alert, Rear Cross Traffic Alert, Forward Collision Alert, and the intuitive Driver Safety Alert Seat. AMVIC LICENSED DEALER