First sign of the bearing going out is a noise or growling sound that comes and goes. Cold or hot it doesn't matter. I had this problem several times. When I took it to the dealer the sound was there then it's went away. Luckly it came back while they were walking away. The service Manager turned his head and I said "Can you here it now!"
I hope you do not have to go thru what I went through! You can see the bearing going out by looking at the pulley and compairing it to the other OEM parts, the pulley will start to wobble slightly, it's all down hill from there!
Best of luck to you,
Tim
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2005 White Hummer H2 Adventure, Tinted Windows, Hella Fog Lights, Piaa Driving Lights, Chrome Fuel Door, V1, Gobi Rack W/ Ladder and Chrome Steps.
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