If the noise is only coming from the AC belt then i am sure you need to replace the small tentioner for that belt. It is a very week spring in that unit and i have replaced many for this problem. Good luck
07 Escalade - Belt Squeal
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 need a new belt than try a Bando brand, this brand seems to help keep the noises away.
As i stated before get your self a bando brand belt and this realy does take care of the noises, Many happy customers.
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