07 Pontiac GP GXP 5.3 81,000 miles The harmonic balancer not spinning true..is this normal? If this not normal what issues can develope if it's not repaired? Anyone have an idea how big this repair job is? I don't know how long it's been this way. I have driven at least 10.000 miles after noticing the wobble lucky there haven't been issues. Runs smooth- no drips -zero issues-operates as it should .. If Not repaired is this going to internally damage this engine? Anyone experience this wobble issue ? Please comment. Thanks