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Buzzing/Rattling coming from muffler area at about 1500 rpm

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Old 08-14-2012, 06:23 PM
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Default Buzzing/Rattling coming from muffler area at about 1500 rpm

What is this buzzing sound and how do I get it fixed? Is it one of the mufflers?
Old 08-14-2012, 10:48 PM
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Might be a heat shield.

Posting a video will help.
Old 08-16-2012, 08:34 PM
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I'll try to post a video of it at some point soon. It sounds like a metal-to-metal vibration. It is not drivetrain related at all. Definitely something in the exhaust behind the rear axle.
Old 11-23-2012, 11:58 PM
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afm kicking in try tapping the throttle to see if it goes away. than you will know for sure its the afm
Old 11-24-2012, 12:11 AM
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LS3 dont have afm
Old 11-27-2012, 08:58 AM
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2010s have a few instances of the actual baffles going bad inside the mufflers. If you are under the original 3yr/36K miles mark....it will be covered under warranty....if not get a real catback/axle back anyway!



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