13.4 GMC Infotainment Screen | Denali Reserve Package | 15 Head-Up Display | Gooseneck/5th Wheel Prep Package | Dual Alternators | Bose Premium Audio | Power Sunroof | Rear Camera Mirror The 2026 GMC Sierra 3500 Denali Crew Cab 4WD single-rear-wheel (SRW) heavy-duty truck masterfully unites extreme commercial capability with premium executive luxury. Styled in a brilliant Glacier White Tricoat exterior with a highly distinguished Atmosphere/Brownstone premium leather interior, this dominant rig is powered by the proven Duramax 6.6L V8 Turbo Diesel engine working alongside a smooth, heavy-duty 10-speed automatic transmission. Built to conquer demanding hauls and challenging site conditions, it features a 3.42 rear axle ratio, an electronic Autotrac 2-speed transfer case, digital variable steering, a high idle switch, and a robust 5,488 kg (12,100 lb) GVWR. It arrives completely outfitted for major towing duties via the factory Gooseneck/5th Wheel Prep Package, dual alternators (220-amp primary and 170-amp auxiliary), an integrated trailer brake controller, and a dedicated in-vehicle trailering app. The upscale cabin serves as a sophisticated mobile command center, dominated by a massive 13.4-inch GMC Premium Infotainment touchscreen with Google Built-In, a 12.3-inch reconfigurable digital Driver Information Centre, and a rich Bose premium sound system. Opting for the Denali Reserve Package elevates convenience with a power sunroof, a Rear Camera Mirror, and a multi-colour 15-inch Head-Up Display. Uncompromised comfort is guaranteed on every trip with 12-way power-adjustable, heated, and ventilated front seats with driver memory settings, a heated wrapped steering wheel, heated rear outboard seats, wireless charging, and dual-zone automatic climate control. The exterior package blends sleek design with ultimate workspace utility, offering chrome assist steps, a factory spray-on bedliner with 120V power outlets, a tailgate assist handle, animated LED projector headlamps, a power sliding rear window, a Bed View Camera, and the innovative six-position GMC MultiPro Tailgate. Comprehensive driving assistance and peace of mind are delivered by the Sierra HD Pro Safety suite, featuring HD Surround Vision, Adaptive Cruise Control, Trailer Side Blind Zone Alert, Rear Cross Traffic Alert, and a Driver Safety Alert Seat. AMVIC LICENSED DEALER Stock #T4334661