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I am a newbie here. I have searched but not come up with and answer to my question. I have seen Harmonic balancer problem with 05 ans 06 Vettes and even one 07. Has GM solved the issue? I have an 08, Should I be concerned? Thanks for your help
Not unless you are having a problem. Almost all crankshaft pulleys (harmonic balancer) wobble to a certain degree. If your main belt starts doing a repetitive chirping at idle, then you have a problem that can only be solved by replacing the pulley, hopefully under warranty. At the dealer its ~ $1000.