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07 Escalade - Belt Squeal

14520 Views 15 Replies 6 Participants Last post by  MrHolland
I have struggled with this since I have owned the truck. I have replaced all the belts, idler pulleys, and tension pulleys. I am using Gates belts. I have eliminated the squeal on the main serpentine belt. I can spray belt conditioner on the AC belt, it will stop screaming until it wears off, then start up again. Moisture or rain makes it worse. It is worse in the morning on cold starts. Any one got any solutions? I'm wondering if the AC compressor is going bad... it works great though. This is driving me crazy.
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If you turn the climate control off, does the squeal change? What about if you turn on the defogger? If it is worse in the first case, it could be a bad A/C clutch bearing. Otherwise, it could be the compressor itself.
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