4X4 6.6L DURAMAX ALLISION TRANS. I have a 2012 Chevrolet Silverado LT Crew Cab 3500HD dually 4x4 with 237,315 miles for sale. I have a clean and clear title for it. Runs and drives perfect with no check engine light or dash lights on. Everything on this truck works exactly like it is supposed to. Has ice cold AC, heat works perfect, good radio, leather seats, etc. It is deleted and tuned so no DEF system. Has Ranchhand bumpers front and rear. has gooseneck turnover ball in bed.