2005 Cadillac Cts On Rare Occasion Highway Speed Steering Wheel Begins

2005 CADILLAC CTS
48,000 MILES
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On rare occasion at highway speed, steering wheel begins to oscillate (not vibrate). It rapidly becomes severe in intensity. Steering seems not to be affected; but tremor rapidly becomes uncontrollable as though something is very, very loose or disconnected. Slowing down only slows down the intensity (not subject to specific speed as in balance). After car sits for a period as in overnight, car drives normally. After that, next event is unpredictable--maybe today or next month. Nothing is apparently broken. Mechanic suggests entire rack and pinion assembly. Does Cadillac know about this flaw and its likely consequence? It feels like a wheel is loosening and about to actually fall off. Annie Walker
Dec 23, 2012 at 4:20 PM
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HMAC300
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there are no tsb's on this problem but have the balance in front tires checked then if they are ok switch tires to rear and see if that helps/stops it. it may just be old/bad tires. Also take to a different mechanic an d have them check front end.
Dec 23, 2012 at 4:24 PM
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