My '05 S/C' has a terrible rattle in the exhaust, I understand that I'm not the only one with this problem. At first it wasn't so bad but its getting worse. I think its the butterfly's but how can I fix it?
Your dealer will replace the entire exhaust for free under warranty. The pins and hinges on your valve/flappers begin to rust and fail. That's is why they changed it on the 06 cars.