The 2020 GMC Sierra 2500HD AT4 pairs serious heavy-duty capability with rugged off-road readiness and premium style. Built to handle tough towing and hauling, it features advanced performance systems and bold AT4 design cues for confident driving in any terrain. Inside, the well-appointed cabin offers comfort, technology, and thoughtful convenience for every journey. This truck delivers strength, versatility, and refined capability in one commanding package.

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ENGINE DURAMAX 6.6L TURBO-DIESEL V8 B20-DIESEL COMPATIBLE (445 hp [332 kW] @ 2800 rpm 910 lb-ft of torque [1220 Nm] @ 1600 rpm) (Includes (K05) engine block heater.),Tow Hitch,Running Boards/Side Steps,Locking/Limited Slip Differential,Four Wheel Drive,Tow Hooks,Power Steering,ABS,4-Wheel Disc Brakes,Aluminum Wheels,Tires - Front All-Terrain,Tires - Rear All-Terrain,Conventional Spare Tire,Bed Liner,Daytime Running Lights,Fog Lamps,Heated Mirrors,Power Mirror(s),Integrated Turn Signal Mirrors,Power Folding Mirrors,Privacy Glass,Integrated Tailgate Step,AM/FM Stereo,MP3 Capability,Bluetooth Connection,Auxiliary Audio Input,Smart Device Integration,HD Radio,Satellite Radio,Requires Subscription,Bluetooth Connection,WiFi Hotspot,Bucket Seats,Leather Seats,Power Driver Seat,Driver Adjustable Lumbar,Power Passenger Seat,Passenger Adjustable Lumbar,Heated Front Seat(s),Heated Front Seat(s),Cooled Front Seat(s),Mirror Memory,Seat Memory,Heated Rear Seat(s),Pass-Through Rear Seat,Floor Mats,Leather Steering Wheel,Heated Steering Wheel,Steering Wheel Audio Controls,Adjustable Steering Wheel,Power Windows,Power Windows,Power Windows,Power Door Locks,Keyless Entry,Power Door Locks,Keyless Start,Remote Engine Start,Cruise Control,Security System,MP3 Capability,Auxiliary Audio Input,MP3 Capability,Auxiliary Audio Input,Power Outlet,Power Outlet,Climate Control,Multi-Zone A/C,A/C,Rear Defrost,Auto-Dimming Rearview Mirror,Traction Control,Stability Control,Daytime Running Lights,Driver Air Bag,Passenger Air Bag,Front Side Air Bag,Front Head Air Bag,Rear Head Air Bag,Passenger Air Bag Sensor,Telematics,Requires Subscription,Back-Up Camera,Back-Up Camera,Driver Restriction Features,Tire Pressure Monitor