The 2018 GMC Sierra 3500HD Denali 4WD Crew Cab Standard Box is a heavy-duty truck that combines robust performance with upscale features. Powered by a 6.6L Duramax Turbo-Diesel V8 engine producing 445 horsepower and 910 lb-ft of torque, it offers a maximum towing capacity of up to 20,000 lbs and a payload capacity of 5,761 lbs . The Denali trim features a distinctive chrome grille, HID projector-beam headlamps, and 20-inch chromed aluminum wheels. Inside, it boasts leather-appointed seating, heated and ventilated front seats, a heated steering wheel, and an 8-inch touchscreen infotainment system with navigation and Bose premium audio. Advanced safety features include forward collision alert, lane departure warning, and a rearview camera, making it a well-rounded choice for those seeking power and luxury in a heavy-duty truck.