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  1. Chevy Impala 9th Gen Discussion
    Is it possible to do an engine swap from a 2007 LTZ 3.9 LZ9 to a 2008 LTZ That had a 3.9 LZ8(LZG). I don’t know if I need to reprogram the ECU’S. Or what the main difference between them is. I would like to swap for a little more performance. Also would not like the check engine light to be on...
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