2020 GMC Sierra 2500HD AT4 in Black with Jet Black Leather interior combines workhorse capability with premium comfort and advanced technology. This 4D Crew Cab is powered by the legendary Duramax 6.6L V8 Turbodiesel engine paired with a smooth 10-Speed Automatic transmission and full-time 4WD, delivering the towing and hauling performance serious truck owners demand. A local trade-in, this Sierra arrives ready to handle any job while keeping you connected and protected on every drive.- Duramax 6.6L V8 Turbodiesel with 10-Speed Automatic and 4WD- Bose Premium 7-Speaker Sound System with Premium GMC Infotainment and Navigation- Multicolor 15'' Diagonal Head-Up Display- Gooseneck/5th Wheel Package and Integrated Trailer Brake Controller- Automatic Emergency Braking, Forward Collision Alert, and Lane Departure Warning- HD Surround Vision with Trailer View and Rear Camera Mirror- Heated and Ventilated Front Bucket Seats with Leather- Lane Change Alert with Side Blind Zone Alert- Wireless Charging and Power Sunroof- IntelliBeam Automatic High Beam and Ultrasonic Parking AssistThis truck delivers the professional-grade technology and safety features to match its serious capability. Whether towing a gooseneck trailer, navigating in low light with IntelliBeam automation, or parking with surround cameras and ultrasonic sensors, the AT4 keeps you confident and aware. Visit us to experience this well-equipped Sierra and discover why it's the choice for those who refuse to compromise on power, comfort, or innovation.