Rugged and ready for any adventure, this 2021 GMC Sierra 2500HD AT4 is a true force to be reckoned with. Boasting a powerful Duramax 6.6L V8 Turbodiesel engine paired with a 10-speed automatic transmission, this 4WD powerhouse is built to tackle the toughest terrain with ease.- GOOSENECK / 5TH WHEEL PACKAGE- HEAVY DUTY FRONT SPRING/CAMPER PACKAGE- AT4 PREFERRED PACKAGE- DRIVER ALERT PACKAGE I- 20 MACHINED ALUMINUM WHEELS with high gloss Black accents- BLACK SPORT STEP and FRONT & REAR SPLASH GUARDS (dealer-installed)Elevate your driving experience with premium features like the Bose Premium Audio System, 8 diagonal Premium GMC Infotainment System with Navigation, Wireless Charging, and more. Enhance your visibility with the HD Surround Vision and Bed View Camera with Trailer Camera Provisions.Whether you're hauling heavy loads or conquering the great outdoors, this Sierra 2500HD AT4 is up for the challenge. Experience the uncompromising capability and refined comfort that make this truck a true standout in its class.