I did a search, but to no avail. after the high idle turns off, the skid plates will vibrate terribly at idle to around 1300 rpm. I tried tightening them up, but they didnt feel loose. Has anyone ever experienced this symptom before and how did you cure it? BTW I have an 04 2wd Tahoe LT. any sound advice will be greatly appreciated.

hvyjnkr

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