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Re: water pump
The bearings are probably worn and the pump is slowly on its way out.. WHen you turn the defrost on, it lowers the engine RPM.. thats probably why the squeeling stops..
I like to stick to OE parts.. Go to a GM dealership.. With parts like that that are a PITA to change, Its a good idea to stay away from auto parts stores like Partsource or Canadian tire.. (or Autozone or Pep boys if you live in US)
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1991 Camaro Z28
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