10.2 GMC Infotainment Screen | Dual-Pane Panoramic Sunroof | Max Trailering Package | Perforated Leather Heated & Ventilated Front Seats | 9-Speaker Bose Audio | ProGrade Trailering System | Second-Row Power Release Bucket Seats | Power-Folding Third Row The 2023 GMC Yukon XL AT4 4WD seamlessly blends long-wheelbase cargo versatility, rugged off-road attitude, and premium passenger luxury. Making an authoritative statement with its bold Onyx Black exterior and a highly refined Jet Black perforated leather interior layout, this full-size flagship SUV is powered by the proven 5.3L EcoTec3 V8 engine paired with a crisp 10-speed automatic transmission. Masterfully tuned for backcountry trails and unpredictable Canadian winter conditions, it features a 2-speed transfer case, a mechanical limited-slip differential, Hill Descent Control, and protective front underbody skid plates. The optional Max Trailering Package heavily upgrades its utility, adding an extra-capacity cooling system, an integrated trailer brake controller, Trailer Side Blind Zone Alert, and the comprehensive ProGrade Trailering System featuring Hitch Guidance with Hitch View and an in-vehicle trailering app. The aggressive AT4 profile is stylized by premium dealer-installed touches, including black nameplates, molded splash guards, front recovery hooks, a reflective window shade, and an illuminated GMC puddle lamp emblem. The massive extended interior cabin stands as a true first-class sanctuary, brilliantly illuminated by a dual-pane power panoramic sunroof. Front-row passengers travel in absolute luxury with heated and ventilated power-adjustable bucket seats featuring driver memory presets that recall position adjustments for the seat, outside mirrors, steering column, and a dealer-installed sport pedal cover kit. Cabin versatility is maximized by upgraded optional second-row power-release bucket seats and a power-folding 60/40 split-bench third row, backed by an integrated cargo net and a full weather-ready Floor Liner Package. High-end comfort and tech run deep, highlighting tri-zone automatic climate control, a heated steering wheel, a wireless smartphone charging pad, and a premium 9-speaker Bose audio system. The digital dashboard is anchored by a 10.2-inch HD colour GMC Infotainment touchscreen system with wireless Apple CarPlay and wireless Android Auto capability. On-road confidence is fully maintained via an array of proactive safety systems, including an HD Rear Vision Camera, Front and Rear Park Assist, Lane Change Alert with Side Blind Zone Alert, Lane Keep Assist, Rear Cross Traffic Alert, Automatic Emergency Braking, and the intuitive tactile Safety Alert Seat. Stock #L4636A AMVIC LICENSED DEALER