This 2021 GMC Sierra 2500 AT4 is equipped with the 6.6L Duramax diesel engine and an Allison automatic transmission. It is 4x4 with on the fly shifting. The AT4 offers a rugged design built for on road comfort and very off road capable. It has just been outfitted with 4 brand new (less than 500 miles on them) Michelin Defender 10 ply tires. Freshly serviced and ready to go! It is equipped with the AT4 preferred package including 360 degree camera with bed view, Bose sound system, 8" touchscreen with Navigation and wireless Apple Carplay/ Android Auto. It has the AT4 high clearance step rails which add to the rugged yet sleek design of the truck. Driver alert package is also included consisting of front and rear parking sensors/cameras, lane change alert, and blind spot monitoring. This truck runs and drives like new, never smoked in or abused. Clean Carfax report with zero accidents reported. Please reach out with any questions. Thank you!