Question about Cadillac DeVille

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Passenger rear wheel area has a knocking noise. Sounds like something is hitting against the frame or the stut is knocking. Rear air and electronic struts repalaced with new ones about 1 1/2 years ago. Car rear end not bouncing or profile low. Could this be a bad strut which is occationally failing? (electrically or air wise) Drivers side has no problems. How can I find out what is making this noise? Sometimes the knocking noise doesn't occur at all.

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Not sure what you are saying about the kind of noise u hear, if u mean over rough roads then the problem can be a strut failing or it can be defective rubber suspension bushing or a loose bolt or nut that holds one of the parts of the rear suspension on, I would tend to lean toward the bushings or a loose nut or bolt, my suggestion is that you have a local tire shop inspect the suspension and test drive it for the noise, maybe ride along with the technician to ID the noise, tire shops and alignment shops will almost always do this inspection for free in hopes they get the job, have this inspected ASAP as any noise in the suspension can been dangerous.

Posted on Apr 26, 2010

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