This 2016 GMC Sierra 3500HD Denali represents a serious work truck built for demanding tasks and built to last.- Duramax 6.6L V8 Turbodiesel engine with 397 horsepower and 765 lb-ft of torque- Allison 1000 6-Speed Automatic transmission- Power sunroof- Engine block heater- Duramax Plus Package- Trailering wiring provisions for camper, fifth wheel, and gooseneck trailer- Dual-zone automatic climate control- Leather-appointed heated and ventilated front seats- AM/FM/SiriusXM with IntelliLink and navigation- Bose premium audio system- Rear vision camera with dynamic guide lines- Ultrasonic front and rear park assist- Forward collision alert- Lane departure warning system- OnStar with 4G LTEUnder the hood, this Sierra 3500HD delivers the capability you need. The Duramax diesel engine produces substantial torque for towing and hauling, while the Allison transmission provides smooth shifting and reliability. An engine block heater simplifies cold-weather starts, and the exhaust brake aids in controlling heavy loads on descents.The Denali trim elevates the driving experience with premium materials and thoughtful details. Perforated leather-appointed seats offer comfort during long drives, with heating and ventilation to adjust to your preference. The heated steering wheel and dual-zone climate control ensure comfort year-round. Chrome details, including power-adjustable heated mirrors and door handles, add distinction to the white exterior.Technology integration focuses on practicality. The IntelliLink system with navigation and SiriusXM satellite radio keeps you connected and informed. The rear vision camera with dynamic guide lines and ultrasonic park assist simplify maneuvering this full-size truck. Forward collision alert and lane departure warning provide additional confidence on the road.Trailering capability is built in. Wiring provisions for camper, fifth wheel, and gooseneck trailers are included, with a 7-way harness located at the rear frame. The truck is engineered to handle serious towing applications safely and reliably.This Sierra has served its previous owner well and stands ready to do the same for you. Whether for work or weekend adventures, this diesel-powered truck combines Denali refinement with genuine heavy-duty capability.