Onyx Black 2021 GMC Sierra 1500 AT4 4WD ?? a rugged yet refined full-size truck powered by the EcoTec3 6.2L V8 paired with a 10-speed automatic transmission. With 4WD and a performance-tuned AT4 suspension, this Sierra is built to confidently handle off-road terrain, towing demands, and everyday driving across the Pacific Northwest while delivering strong power and smooth shifting.
The AT4 trim combines capability with premium comfort, featuring Jet Black leather seats with Kalahari accents throughout the cabin. Heated and ventilated front seats, a heated steering wheel, and a power sunroof elevate comfort for all seasons, while the floor-mounted center console and thoughtfully designed interior layout provide both utility and refinement.
Technology is a major highlight, led by the multicolor 15 diagonal head-up display, 8 driver information center, and advanced infotainment system with 4G LTE Wi-Fi hotspot capability, USB connectivity, and OnStar/GMC Connected Services. The HD surround vision system, rear camera mirror, bed view camera, and trailer camera provisions provide exceptional visibility for parking, hauling, and towing.
This Sierra AT4 is equipped with a comprehensive suite of advanced safety and driver-assistance features, including Adaptive Cruise Control, Forward Collision Alert, Automatic Emergency Braking, Lane Keep Assist with Lane Departure Warning, Front Pedestrian Braking, Following Distance Indicator, and a Safety Alert Seat for added awareness.
Built for serious capability, it includes the ProGrade Trailering System, integrated trailer brake controller, trailering package, auto-locking rear differential, hill descent control, and auxiliary transmission cooling. Additional rugged features include red recovery hooks, a spray-on bedliner with AT4 branding, LED cargo lighting, and rear wheelhouse liners.
Additional highlights include:
Power sunroof for an open-air driving experience
Keyless open & start with remote vehicle starter system
IntelliBeam automatic high beams
Deep-tinted glass for comfort and privacy
Multiple power outlets (120V and 12V) and USB ports
Power windows with express up/down functionality
Premium suspension tuned for both off-road and highway comfort
Body-color surround grille and AT4 high-clearance step (LPO)
Recent arrival.
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