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security relearn isnt working

  1. Chevy Impala 7th Gen Discussion
    I apologize guys I know this has probably been gone over. I searched before posting this but didn't find anything that helped. I have an 04 impala ss just installed zz 1.0 pcm followed the directions step by step. Now car won't start trying to do security relearn as directed by zzperformance and...
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