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99 Deville engine squeal when cold.
I had the same problem about a year ago, the noise was there every morning for at least a month so I took it to the Cadillac dealer, they kept it for three days so they could start it cold. They claimed that it never made the noise. When I picked it up it didn’t squeal again until a week ago, now it does it every morning.
Any help would be greatly appreciated.