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2006 Sierra squealing video attached


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Posted

2006 Sierra aluminum 5.3 has had a belt or pulley squeal since almost new. Dealer just kept putting belts on till it was out of warranty. 84,000 miles an still haven't figured it out. Changed the tensioner and belt and it squealed instantly and now I replaced the idler pulley and still squealing. My inspection stage said tensioner and idler so tensioner being newer and replacing the idler didn't work I'm stuck with this damn noise still. Video attached. Anyone with experience diagnosing this or fixing it any advice would be appreciated. Thanks

 

sorry video didnt load, I will try to make it smaller and reload it.

Posted

It may be worth checking if all the pulleys are in alignment. IIRC, one other guy on here had a belt squealing problem & it turned out that his PS pulley wasn't fully pressed all the way in on its shaft. The thread would have been within the last three months.

Posted

Thanks. That was checked initially when it was under 36,000 miles and everything was good. Not sure I want to pay another GM garage to check it. Seems the local guys can't check for alignment; I've asked. Thanks. I can try to make sure the PS is on but it's never been off.

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