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Discussion Starter #1
:eek: Sorry I originally put this in the wrong category:

I am experiencing a high pitched noise coming from the back portion of the car on normal acceleration, not hard acceleration. My GM dealer says the exhaust system is the cause and needs to be replaced from the catalytic converter back. It’s a 2008 GT Convertible with the 3.5 V6 and 40k miles.

Has anyone experienced this???

If this is true then I am thinking I may as well replace with a Magnaflow Catback system… does anyone have experience with that?

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