Leave your inhibitions behind in our 2021 GMC Sierra 3500HD AT4 Crew Cab 4X4 presented in Summit White! Fueled by a TurboCharged 6.6 Litre Duramax Diesel V8 that offers 455hp and a massive 901lb-ft of torque connected to a 6 Speed Automatic transmission to make passing and towing easy work. This Four Wheel Drive provides impressive acceleration and massive towing/hauling capability that will exceed your expectations. The bold exterior is accented by its spray-on bedliner, side BedStep, LED lighting, bold grille, black accents, power-adjustable heated mirrors, Red recovery hooks, and GMC's MultiPro tailgate that offers 6 functions to help improve your workday. The AT4 cabin greets you with a heated steering wheel, heated and ventilated leather seats, heated second-row seating, dual-zone automatic climate control, and a driver information center. Staying safely connected is comfortable with Bluetooth, full-color navigation, and our Bose touchscreen 7-speaker audio system with IntelliLink, USB Ports, Android Auto/Apple CarPlay, auxiliary jack, wireless charging, available satellite radio, and available OnStar with a WiFi hotspot. Imagine yourself taking on your day in this beautiful machine! With GMC, feel confident and in control with an HD rear camera, hitch guidance, ABS, traction, and stability control with trailer sway control, 6-airbags including front-seat side airbags and full-length side curtain airbags. Solidly-built with all the refinement and style you can imagine, this Sierra 3500 is calling your name! Print this page and call us Now... We Know You Will Enjoy Your Test Drive Towards Ownership!