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  1. New PCM Caused Old PCM to Not Work

    PCM's & Tuning
    Hi everyone, New to the 3800pro forum, but I've been a member of RegalGS.org for awhile now. Just starting to mod, and after getting my aeroforce gauge and a downpipe, I thought I'd get an Overkill PCM. I have a 2000 Buick Regal GS, and my stock PCM had the number #09380717 on the bottom. I...