Introducing the stunning 2026 GMC Sierra 2500HD AT4X in a captivating Onyx Black finish. This new Crew Cab Standard Box 4-Wheel Drive is equipped with the formidable Duramax 6.6L Turbo-Diesel V8 engine, paired with a smooth 10-speed automatic transmission, ensuring outstanding performance and handling on any terrain.The exterior of this remarkable truck features 18" AEV black gloss aluminum wheels with laser etching, gloss-black door handles, and the distinctive AT4X AEV Edition upgrades including stamped steel bumpers. Inside, immerse yourself in luxury with Obsidian Rush full-grain leather seats, offering both heated and cooled options for the front seats, as well as a heated steering wheel for those cold Canadian winters. The crew cab layout provides ample space and comfort for all passengers.Technology takes center stage with the 13.4" diagonal Premium GMC Infotainment System. This advanced system includes navigation, Bluetooth streaming, and wireless integration for both Android Auto and Apple CarPlay, ensuring connectivity at your fingertips. Safety features such as a backup camera, lane assist, adaptive cruise control, and multiple skid plates highlight the comprehensive suite of driver assistance options designed to keep you secure on every journey.This truck is an ideal choice for adventure seekers and those who require power coupled with luxurious comfort and technological prowess. Contact NewRoads Chevrolet Cadillac Buick GMC today to learn more about this incredible 2026 GMC Sierra 2500HD AT4X, and take the first step in making it yours.Chevrolet Cadillac Buick GMC dealership between Barrie and Aurora. We sell new and used GM vehicles throughout our York Simcoe region.