Muffler Rattle?

Hi,

I have a 2011 Impala with 10,000 miles on it. Recently, something started rattling from the undercarriage when going over bumps. It is a high pitch rattle like a trailer when it goes over bumps. I have taken it to two chevy dealers and they said that the muffler was damaged, that it hit something and was pushed out of place. It was also missing a clamp which they reinstalled. They recommended a new muffler and said all other suspension components were fine (which I am doubting since one of them missed the missing clamp in the first place).

Question: Is there anything inside the muffler itself that could be causing the rattling?

Any advice you could give me would be greatly appreciated.

The muffler will have baffles inside but ( since it's a 2011 model ) I doubt the muffler itself is the problem . Exhaust systems generally are connected to the vehicle utilizing rubber mounts ( to lessen the noise and vibration ) , likely you have a broken or missing rubber mount causing the exhaust system to move excessively and hitting the bottom of your floor pan .

Hi,

I have a 2011 Impala with 10,000 miles on it. Recently, something started rattling from the undercarriage when going over bumps. It is a high pitch rattle like a trailer when it goes over bumps. I have taken it to two chevy dealers and they said that the muffler was damaged, that it hit something and was pushed out of place. It was also missing a clamp which they reinstalled. They recommended a new muffler and said all other suspension components were fine (which I am doubting since one of them missed the missing clamp in the first place).

Question: Is there anything inside the muffler itself that could be causing the rattling?

Any advice you could give me would be greatly appreciated.

these mufflers have internal baffles. if the muffler has a dent on the exterior this can cause these internal metal baffles to break off , and rattle..my concern is this can restrict the exhaust, also this will wear a hole in the muffler shroud..they should replace the muffler on warrantee, since a missing clamp caused the muffler to fall down...if you hit something and this all occured , then it would be best to go to a muffler shop and replace it..dealership will cost too much ! get stainless steel only.......

Don't forget about the warranty.