So i went to another shop,, he found no codes stored,, then said he had another truck several weeks ago do the same thing,, He said he replaced the PCM and all was good,,,, any ideas,, the SES light would come on then go out on its own,, I put new UVC gaskets on around 20000 miles ago so i would not think thats the problem,, also how i remove a chip,, was told in PM that could be a problem,,,, Help i need to work Monday