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Hello all. I recently purchased a 1997 Cadillac Sedan Deville and it has a rattling when the car is on. It immediately stops when the A/C is turned on but shortly starts back up. It sounds like a metal rattling coming from under the car. Any ideas? Thanks to all.
 

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White Diamond '03 DHS (with DTS floor shift)
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87,179 Posts
Belt tensioner, idler pully, A/C clutch? Maybe the cat or the heat shield above it?
 
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