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Mine has a lot of valve train chatter but I have headers and I could barely hear it before the headers. You might want to have it looked at by the dealer. LS motors are noisy but what you describe is excessive for stock.
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BLK/BLK 1SS/RS Ordered 11-01-2009 Took delivery 12-22-2009. Heads/cam/converter/bolt ons. SOLD Feb 2015 to fund 6th gen LT1 SS with 8L90E.
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