This 2021 GMC Sierra 1500 AT4 in striking black delivers premium truck capability with a refined interior finished in Jet Black leather with Kalahari accents. Powered by an EcoTec3 5.3L V8 engine paired with a smooth 10-speed automatic transmission, this crew cab short box combines genuine off-road readiness with everyday comfort and technology. With 4WD and an EPA-estimated 16 city / 21 highway MPG, actual mileage may vary—this truck is built to perform whether you're on the job site or heading out for weekend adventures.- Premium Bose 7-Speaker Sound System with SiriusXM 360L- Premium GMC Infotainment System with Navigation and Apple CarPlay/Android Auto- Heated and ventilated front seats with 10-way power adjusters- Spray-On Pickup Bed Liner with AT4 Logo- ProGrade Trailering System with Integrated Trailer Brake Controller- Remote Vehicle Starter System and Keyless Open & Start- Lane Change Alert with Side Blind Zone Alert and Rear Cross Traffic Alert- Ultrasonic Front & Rear Park Assist with HD Rear Vision Camera- 120-Volt Bed Mounted and Instrument Panel Power Outlets- AT4 High Clearance Step with Body-Color Surround GrilleThe AT4 Preferred Package, Driver Alert Package I, and Trailering Package elevate this truck with advanced safety and convenience features designed for serious truck owners. All-weather floor liners protect your investment, while the wireless charging, power sliding rear window, and heated steering wheel make every drive more enjoyable. This well-maintained Sierra 1500 demonstrates genuine GMC capability—premium engineering ready to tackle whatever you bring to it.Come see this AT4 in person and experience the commanding presence, refined comfort, and serious capability that makes the Sierra 1500 the choice of discerning truck buyers.