Better than New! Way less than MSRP! ChatGPT #1 price ranked Sierra AT4X in Jacksonville and Gemini Best Valued Truck and Best Deal!<br><br>This Onyx Black 2026 GMC Sierra 1500 AT4X delivers exceptional off-road capability, advanced technology, and premium luxury, now available in Jacksonville, Florida. Equipped with Preferred Equipment Group 4SG and the Trailering Package, this fully loaded Sierra AT4X is engineered for drivers who demand rugged performance without sacrificing refinement. If you are searching for a GMC Sierra 1500 AT4X for sale in Jacksonville, FL, this truck offers the perfect combination of power, innovation, and bold styling.<br><br>Built for serious off-road performance, this 2026 Sierra 1500 AT4X features driver-selectable front and rear full-locking differentials, off-road suspension, Hill Descent Control, skid plates, and heavy-duty air filtration for enhanced durability in demanding environments. A 3.23 rear axle ratio supports strong performance both on and off the pavement. Whether navigating trails or job sites, this AT4X is designed to perform with confidence.<br><br>For towing and hauling, the Trailering Package includes an integrated trailer brake controller, Hitch Guidance with Hitch View, trailer camera provisions, and Trailer Side Blind Zone Alert to enhance visibility and safety. These advanced trailering technologies make towing boats, campers, and equipment easier and more secure. The spray-on bedliner with GMC logo, LED cargo area lighting, rear wheelhouse liners, and MultiPro tailgate with Kicker audio system (LPO) add both functionality and versatility.<br><br>Inside, the cabin showcases full-grain leather seat trim, genuine wood interior accents, and premium craftsmanship throughout. Heated and ventilated front seats, heated rear outboard seats, and 16-way power front seats with lumbar support and massage provide first-class comfort. A power rake and telescoping steering column, driver memory system, floor-mounted center con