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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a 2010 silverado 1500 lt with a 5.3 flex fuel after

Customer Question

I have a 2010 silverado 1500 lt with a 5.3 flex fuel after going thru water my ac started making a loud squealing sound when ac is on and off
JA: Where exactly do you think the noise is coming from? And how long has this been going on?
Customer: Sounds like the ac clutch and pully and it didn't start until the day after I havint moved it since
JA: Are you fixing your Silverado 1500 yourself? What have you tried so far?
Customer: Trying but don't know where to even start
JA: Anything else you want the mechanic to know before I connect you?
Customer: No except that I have tried to spray all the mud or dirt out and it didn't change
Submitted: 1 month ago.
Category: Chevy
Expert:  Jared D replied 1 month ago.

It sounds like either one of the belts is slipping on the pulley or one of the pulleys has locked up and isn't turning with the belt.

After letting the vehicle dry out the noise hasn't gone away?

The noise is the same with the AC on or off?