13.4 GMC Premium Infotainment | AT4X AEV Edition | Duramax® 6.6L V8 Turbo Diesel | Multicolor 15 Head-Up Display | Rear Camera Mirror | 12-Speaker Bose® Premium Series | 16-Way Power Front Seats | Power Sunroof The 2026 GMC Sierra 2500HD Crew Cab AT4X 4WD, exceptionally styled in clean Summit White with an ultra-premium Obsidian Rush full-grain leather interior, establishes a commanding new benchmark for extreme heavy-duty overlanding capability and first-class luxury. Motivated by the legendary Duramax® 6.6L V8 Turbo Diesel engine paired with a heavy-duty 10-speed automatic transmission, this professional-grade powerhouse is built to dominate the most punishing Canadian landscapes. Off-road performance is anchored by an advanced off-road suspension layout featuring specialized DSSV dampers, digital variable steering, a 2-speed active electronic Autotrac transfer case, and a rear electronic locking differential. Heavy-duty vehicle defense and recovery are heavily upgraded via the factory AT4X AEV Edition, which integrates laser-etched 18 AEV gloss black aluminum wheels, AEV stamped steel front and rear bumpers with heavy-duty cast recovery points, and robust AEV stamped steel skid plates safeguarding the front approach, steering gear, and transfer case. Built ready for world-class hauling, it includes a comprehensive trailering package, an integrated trailer brake controller, Hitch Guidance with Hitch View, and an in-vehicle trailering app. The aggressive exterior profile is detailed with animated LED projector headlamps, front LED fog lamps, gloss black door handles, outside power-adjustable trailering mirrors, a factory spray-on bed liner, power-retractable assist steps with LED perimeter lighting, and dual 120V AC power outlets located on both the instrument panel and inside the cargo bed. The meticulously crafted AT4X cabin serves as a high-tech sanctuary of premium comfort and next-generation connectivity. The driver-focused dashboard layout is anchored by a 13.4 diagonal colour touchscreen GMC Premium Infotainment system with Google built-in, wireless Apple CarPlay, wireless Android Auto, and a 12.3 diagonal reconfigurable driver information centre. The premium interior experience is further elevated by a power sunroof and advanced visual aids, including a multicolor 15 diagonal Head-Up Display, an integrated Rear Camera Mirror, and a dedicated Bed View Camera. Occupants enjoy top-tier treatment with a rich 12-speaker Bose® Premium Series sound system, an AEV embroidered front headrest pattern, AEV branded front floor liners, a Universal Home Remote, wireless smartphone charging, a power-sliding rear window, and dual-zone automatic climate control. Front seating features luxury-tier heated and ventilated 16-way power bucket seats with driver memory tracking, perfectly complemented by heated second-row outboard passenger seating. Advanced driver awareness technologies and heavy-duty towing confidence reach premium benchmarks to deliver total peace of mind on city streets or remote backcountry trails. The Sierra 2500HD AT4X comes factory equipped with HD Surround Vision, Front and Rear Park Assist, and Adaptive Cruise Control to take the stress out of handling a full-sized truck. High-tier active safety networks are managed by the comprehensive Sierra HD Pro Safety suite, which integrates Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, and a Following Distance Indicator. Complemented by Trailer Side Blind Zone Alert, Rear Cross Traffic Alert, IntelliBeam auto high beams, and the haptic driver Safety Alert Seat, this tech-forward heavy-duty truck ensures an incredibly secure, deeply connected, and hyper-capable driving experience. Stock #T4289381 AMVIC LICENSED DEALER