13.4 GMC Premium Infotainment | Duramax 6.6L V8 Turbo Diesel | Gooseneck/5th Wheel Prep Pkg | X31 Off-Road & Protection Pkg | SLE Convenience Pkg | 12.3 Digital Driver Centre | Spray-On Bedliner | Chrome Assist Steps The 2026 GMC Sierra 3500 SLE Crew Cab 4WD, presented in Summit White with a Jet Black interior, is a heavy-duty powerhouse equipped with the Duramax 6.6L V8 Turbo Diesel engine and a 10-speed automatic transmission. Built for serious towing, it features the Gooseneck/5th Wheel Prep Package, integrated trailer brake controller, and power-adjustable vertical trailering mirrors with power-folding and auto-dimming glass. The X31 Off-Road & Protection Package adds twin-tube Rancho shocks, skid plates, and Hill Descent Control, ensuring capability across any terrain. Exterior highlights include 18 machined aluminum wheels, chrome bumpers, chrome assist steps, and LED roof marker lamps. The modern cabin is anchored by a 13.4 diagonal colour touchscreen with Google built-in, wireless Apple CarPlay, and wireless Android Auto, complemented by a 12.3 digital reconfigurable driver information centre. The SLE Convenience Package enhances comfort with a 10-way power driver seat and dual-zone automatic climate control. Versatility is provided by the front 40/20/40 bench seat with lockable under-seat storage and a 60/40 folding rear bench. Additional conveniences include the Remote Start Package, a high idle switch, and a spray-on bedliner for maximum durability. Safety is prioritized with the Sierra HD Pro Safety suite, featuring Automatic Emergency Braking, Forward Collision Alert, and Lane Departure Warning. The truck is also equipped with an HD Rear Vision Camera, IntelliBeam auto high beams, and a 2-speed electronic shift transfer case. AMVIC LICENSED DEALER