Rattling noise underneath passenger side 2019 5.3L Trail Boss -- Normal?

[Cody Iddings]

Hi, I just bought this truck with 98k miles. Has a bit of a rattle - see mp3 attached. This was from the passenger side while driving 10-20 mph. Is this normal? Something loose?

[Transient]

Sounds like the heat shield for the spare tire.  Possibly the exhaust sliding back from a connection and a clamp on the pipe that crosses from the passenger side to the driver side is running against the heat shield and might be making a hole.  This happened to me.  Ended up replacing the heat shield because I waited too long to address the issue, and also disassembled the exhaust just so I could turn the clamp around so the bolt side of the clamp was on the opposite side of the exhaust pipe.  I also loosened up the rest of the exhaust connections and made sure all pipes were properly connected, then retightened everything.  The part of my exhaust that had the most play in it was right behind the muffler. 

Edited March 11, 2023 by Transient