Rugged capability meets premium comfort in this one-owner 2020 GMC Sierra 2500HD AT4, finished in Black with leather interior and 102,962 miles. Built for heavy-duty work and confident off-road adventure, this Sierra is powered by the proven 6.6L Duramax V8 Turbo-Diesel (B20-compatible) paired with an Allison 10-speed automatic transmission and 4WD — ready for towing, hauling and long-haul duty. Towing & hauling features: - Pro Grade Trailering Package, Towing/Camper Package and Gooseneck/5th Wheel Prep with hitch platform for gooseneck or 5th wheel hitches - HD Surround Vision with two trailer-view camera provisions plus dedicated Bed View Camera - Exhaust brake, 220-amp alternator, and heavy-duty towing hardware for demanding loads - GMC MultiPro Tailgate for versatile bed access and loading Off-road & exterior highlights: - AT4 off-road package with X31 components and AT4 Premium/PREFERRED packages - Fixed tubular running boards, smoked amber LED roof marker lamps and winter grille cover - Aluminum/alloy wheels and LPO black 6" rectangular assist steps Luxury, tech & convenience: - Premium GMC infotainment with navigation and 8" touchscreen, Bose 7-speaker sound - Multicolor 15" diagonal head-up display and enhanced 8" driver information center - Power sunroof, power sliding rear window, wireless charging, universal home remote - Rear camera mirror (auto-dimming with full camera display) and rear parking sensors Advanced safety: - Automatic Emergency Braking, Forward Collision Alert, Lane Departure Warning - Lane Change Alert with Side Blind Zone Alert, Rear Cross Traffic Alert - Front and Rear Park Assist (ultrasonic), Following Distance Indicator, Safety Alert Seat - Driver Alert Packages I & II for elevated active safety systems Extras included: GOOSENECK/5TH WHEEL PACKAGE, bed view camera, HD trailer provisions, engine block heater, alternator 220 amps, and premium interior appointments. If you need a heavy-duty diesel truck that combines serious towing