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Old 04-10-2018, 05:45 PM   #3
Harry76
 
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Drives: 2018 ZL1 A10 Nightfall Gray
Join Date: Apr 2016
Location: Indiana
Posts: 114
It could be supercharger bearings, I would pull the belt off and spin it by hand.

If your warranty is still good be a little more persistent with the dealer.
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