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2004 CTS-V
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288 Posts
Discussion Starter #1
Kind of a metallic rattling that seems to come from somewhere under the rear when starting to move slowly. Best heard from outside & behind the car; really cannot hear from inside at all, unless in a garage or near a wall that will reflect the sound. Any ideas??
:confused:
Note: maybe kind of like the marbles in a can sound some CORSA owners have complained of; but, my exhaust is stock.
 

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Cadillac Cts-V
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62 Posts
sounds similar to the problem I had. Could be rear differential bushings or the drive shaft being loose.
 

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Registered
2004 CTS-V
Joined
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288 Posts
Discussion Starter #4
UPDATE - Official diagnosis:

Right muffler defective - noise from inside muffler; to be replaced under warranty, but will take 1 week to get replacement part.
 
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