Craving power coupled with the ruggedness to tackle any terrain? The 2026 GMC Sierra 3500HD AT4, cloaked in its Onyx Black exterior with a Black interior boasting Kalahari accents, might just be your match. This heavy-duty champion is powered by a colossal Duramax 6.6L Turbo-Diesel V8 engine, ready to unleash 470 hp and a tremendous 975 lb-ft of torque, teamed with a seamless 10-speed automatic transmission. Optimized for the outdoors, this Sierra 3500HD AT4 comes with the robust Gooseneck/5th Wheel Prep Package, ensuring you’re hitch-ready for demanding towing duties. Plus, the high idle switch enables you to manage your vehicle’s power supply effortlessly, customizing it to your specific work needs or conditions. With a GVWR of 12,100 lbs, this GMC is built to shoulder your heaviest loads. Step inside, and you’re greeted by perforated front leather seating surfaces that offer both heated and cooled comfort, refining your ride irrespective of the weather. The LPO Off-Road High Clearance Step, a dealer-installed gem, enhances accessibility while preserving the AT4’s bold stance. With the inclusion of the AT4 Premium Plus Package, you gain an array of additional features including a power sunroof for those days when you crave a touch of the sky as you drive. For safety and convenience, this Sierra is equipped with an array of driver assists, like Front Collision Mitigation, Blind Spot Monitor, and Rear Parking Aid, supplemented by a HD Surround Vision System and Adaptive Cruise Control to reduce driving fatigue. Rain Sensing Wipers and Automatic Highbeams adjust to changing conditions, while the Heated Steering Wheel offers warmth on cooler days. With the added luxury of premium sound and full navigation, you’re set for both work and pleasure. Embark confidently on your next adventure with a 4×4 that defines capability. Are you ready to take the lead with this formidable machine? Stock # T4168808. AMVIC-licensed Dealer.