Check under the floor board and see if the rod for the pedal has started sliding out.it can be tapped in.The truck will also creep when just sitting their running. No codes will come up either.Another thing I have found on 393 is I sometimes have to calibrate the tilt angle sensor. Hope this gets you closer
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.