Catalytic converter rattling sounds?

Tiny
MARTINFLORES
  • MEMBER
  • 2020 GMC JIMMY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190,570 MILES
There's knocking loudly and muffler sounds loud as I'm driving and the catalytic converter sounds like something is loose inside of it.
Monday, August 28th, 2023 AT 1:06 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
2020 GMC JIMMY? This happens when the catalytic converter is hot and then water gets slashed in it which breaks apart the honeycomb inside the converter. This means it will need to be replaced, here is the new catalytic converter on amazon for $135.00 I believe.

https://amzn.to/3qHariB

Please double check the model so I can give you instructions on how to replace it.
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Monday, August 28th, 2023 AT 11:25 AM

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