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Do you have pictures of them? It would be interesting to see what you are seeing. I haven't had lca bushings push out since I traded my 97 for an 03Z. On my 97 the control arms were starting to damage the cradle when I changed them.
If your car is under warranty I would let GM replace them and then worry about another solution when the replacements started having issues. You might find you won't need to spend money on it before you sell the car.
Bill
Last edited by Bill Dearborn; May 19, 2017 at 12:48 PM.