ok, Ive checked just about everything ( oil level and the like) for a reason to this smoke i get. once in a while its white at start up. most the time its blackk, , and i mean wow that truck must be puttin down some horse but is stock kinda smoke. Of course this is only at heavy throttle and if im at red light A by the time the i get to red light C it wont do it anymore. But i have no engine knock and decent mileage so i dont perfer to let dealer to get ahold of it so heres the poll