High pitched noise on normal acceleration (2008 3.5L V6) - Pontiac G6 Forum
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post #1 of 3 (permalink) Old 08-22-2012, 12:54 PM Thread Starter
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High pitched noise on normal acceleration (2008 3.5L V6)

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. Itís 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 systemÖ does anyone have experience with that?

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post #2 of 3 (permalink) Old 08-22-2012, 01:32 PM
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its usually a hole in the resonator causing the noise, if thats the case you can have the old one taken out and replace it with an aftermarket version, instead of replacing the whole cat-back.


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post #3 of 3 (permalink) Old 08-22-2012, 02:21 PM
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A muffler shop will usually be less expensive than a dealer.

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