Used 2021 GMC Sierra 1500

2021 GMC Sierra 1500 AT4 in Onyx Black Premium Off-Road Crew Cab Pickup
Are you searching for a high-caliber full-size pickup truck that effortlessly merges aggressive, trail-ready capability with first-class executive luxury? This commanding 2021 GMC Sierra 1500 AT4 is finished in the highly desirable and stealthy Onyx Black paint, giving it an incredibly sharp, monochromatic aesthetic. As GMC’s dedicated premium off-road variant, the AT4 trim level is purpose-built for drivers who refuse to compromisedelivering a factory-engineered lift and heavy-duty trail hardware alongside an upscale, tech-wrapped interior. Whether you are navigating rough backcountry trails, hauling heavy equipment, or heading out for a premium night on the town, this elite truck is built to command the road with absolute authority.

This exceptionally capable truck comes factory-equipped with a robust array of mechanical upgrades designed to dominate tough environments. It features a specialized Off-Road Suspension paired with Hill Descent Control and an Auto-Locking Rear Differential for maximum traction across mud, gravel, or steep inclines. The exterior showcases an imposing body-color surround grille, functional dark accents, deep-tinted glass, stunning 18-inch machined aluminum wheels, and signature red recovery hooks that declare its off-road pedigree. For heavy-duty workloads, the truck is armed with a dual-alternator setup (170 amp and 220 amp), a factory Spray-On Pickup Bed Liner with the AT4 logo, and a built-in Engine Block Heater for cold-weather reliability. Towing is safer and more intuitive than ever thanks to the advanced ProGrade Trailering System, which packages hitch guidance featuring a specialized Hitch View camera alignment system, a dedicated in-vehicle trailering app, and an integrated trailer brake controller.

Step inside the massive cabin to find an executive sanctuary wrapped in rich, perforated leather-appointed front seat trim. The interior prioritizes unmatched seasonal comfort, offering heated and ventilated front bucket seats, heated second-Row outboard seats, and a leather-wrapped heated steering wheel. Finding your absolute perfect driving position is seamless thanks to 10-way power driver and front passenger seat adjusters with power lumbar support, complete with a driver’s seat memory system. The high-tech cockpit features a Premium GMC Infotainment System with a multi-touch display, a high-fidelity 6-speaker audio layout, SiriusXM with 360L, and full Apple CarPlay and Android Auto smartphone integration. Ultimate lifestyle convenience is built into every detail, offering a Remote Vehicle Starter System, a floor-mounted center console, a 4.2-inch color driver info center, an integrated compass, and multiple 120-volt power outlets located in both the instrument panel and the truck Bed.

Peace of mind comes completely standard on every journey, backed by a comprehensive layout of active safety technologies and rugged construction. This premium pickup features an HD Rear Vision Camera, power door locks with a theft-deterrent security system, auto-dimming heated door mirrors, an auto-dimming rearview mirror, and fully automatic headlights. It also comes standard with electronic stability control, traction control, automatic brake assist, a Low tire pressure warning system, and a comprehensive multi-stage airbag safety layout. With its menacing Onyx Black finish, luxurious heated and ventilated leather cabin, advanced trailering technology, and legendary AT4 off-road hardware, this 2021 GMC Sierra 1500 stands out as a premier choice in the high-end luxury truck market. This vehicle has been thoroughly detailed, meticulously inspected, and is fully ready to level up your driveway. Contact our professional dealership sales team today to lock in your private test drive, explore competitive financing options, or request a personalized virtual video walkaround!