The oil problem looks like rear main seal to me. I know they are tricky to replace without having a leak. They have a very tight tolerance. The wiring issue is interesting and something i'm sure people will be checking now. If it is widespread I wouldn't be surprised if a tsb gets sent out on it. Good luck.
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2012 zl1 Black #1745 Black Wheels ECF Suede 6 spd
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