Gen 5 Camaro External Bolt-On Tech - 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?

Might be a heat shield.

Posting a video will help.

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.

afm kicking in try tapping the throttle to see if it goes away. than you will know for sure its the afm

LS3 dont have afm

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!