The 2026 GMC Sierra 3500HD AT4 Crew Cab combines heavy-duty diesel strength with rugged off-road capability and upscale AT4 refinement. Finished in Onyx Black with a Jet Black/Kalahari interior, this commanding HD pickup is built for towing, hauling, exploring, and demanding conditions.
Performance & Capability
- 6.6L Duramax V8 Turbo-Diesel delivers massive torque for towing and trailering.
- 10-Speed Automatic Transmission keeps the Duramax in its power band.
- Autotrac 4WD + Two-Speed Transfer Case offers selectable traction for varied road, weather, and terrain.
- 3.42 Rear Axle Ratio and Auto Locking Rear Differential boost pulling power and traction.
- Off-Road Suspension + Skid Plates protect against rough terrain.
- Hill Descent Control and Engine Exhaust Brake aid steep descents and towing.
- Integrated Trailer Brake Controller and Hitch Guidance simplify trailer hookup.
- Gooseneck/5th‑Wheel Prep Package and Trailer Camera Provisions support heavy trailer use.
- Trailer Camera Provisions, Bed View Camera, Trailering App enhance visibility and safety.
Winter & Weather Comfort
- Heated & ventilated front seats
- Heated second‑row outboard seats
- Heated steering wheel
- Engine block heater
- Reinforced electric heating/defroster
- Dual‑zone automatic climate control
- Premium floor liners with removable carpet inserts
Interior Comfort & Technology
- Power driver & front passenger seats
- Power sliding rear window
- Rear seat storage package
- Power sunroof
- 13.4” GMC Premium Infotainment with Google built‑in (navigation, voice, Apple CarPlay, Android Auto)
- 12 reconfigurable digital driver info centre
- 15 multicolour head‑up display
- Wireless phone projection & wireless charging
- Bose premium audio system
- Rear camera mirror, universal home remote, multiple USB ports
- Heated steering wheel with audio controls
Safety & Driver Assistance
- Sierra HD Pro Safety suite: Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, Lane Departure Warning, Adaptive Cruise Control, Rear Cross Traffic Alert, Trailer Side Blind Zone Alert, Front & Rear Park Assist, IntelliBeam automatic high beams, Buckle‑to‑Drive, Teen Driver mode, Seat Belt Adjustable Guide Loops, Tire Pressure Monitoring System, etc.
Exterior Styling & Utility
- Onyx Black exterior with aggressive 20” black aluminum wheels
- AT4 high‑clearance off‑road steps
- Red front recovery hooks
- LED headlights, front fog lamps, roof marker lamps, cargo bed lighting
- GMC MultiPro Tailgate (power lock/release, hitch area light)
- Spray‑on bedliner
- 120V bed‑mounted power outlet
- Cargo tie‑downs (12 @ 500 lb each)
- Grille with Black chrome accents
Why Choose This Vehicle?
This 2026 GMC Sierra 3500HD AT4 is a heavy‑duty workhorse with advanced off‑road capability, premium comfort, and cutting‑edge safety tech. Perfect for towing, hauling, winter driving, or any demanding task while offering modern connectivity and driver assistance features.
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