I have a black maxx on a 2008 3500 did the deletes at about 35k. check engine light kept coming on no matter what I did. finally after three updates of software and talking to one of the engineers at H&S the engine light went away. "See dealer Now" message on overhead had been coming on for a month or more now. Suspect CCV filter the problem. H&S tells me this as well as rail plug a good idea. swapping out filters and experimenting with gutting the old one while inserting plug planned this weekend, should have parts by then. Guys at H&S might be able to help you. Do email as their phone line was out of order when I called yesterday due to number of calls. after I sent the email about my order they were nice enough to call back and work thru problems,
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