Squealing noise that sounds like my serpentine belt going out?

ROBYNMOJO7

MEMBER
2003 CHEVROLET TAHOE

I have recently developed a squealing noise that sounds like my belt going out, but it is not constant. I happens when I get over 2000 RPM's and only when the AC is turned on. It also seems to happen when it gets hotter outside. I was able to drive to work this morning with the AC on LOW and it didn't squeal, but yesterday I couldn't turn the AC on without it squealing. Would this be the Belt or is it more to do with the AC?

Tuesday, September 2nd, 2008 AT 8:37 AM

1 Reply

SQM

MECHANIC
6,383 POSTS

Hello,

It does sounds like an issue with the ac belt. This vehicle does have a separate belt for the A/C, so it makes sense for it to squeal when the A/C is on.
A belt will make squealing noise when it gets glazed over and it slips under load.
Many times the belt will make noise with the A/C compressor being turned on as it puts more load.
Inspect the belt and replace if necessary.

Here is a helpful article on noisy belt:

https://www.2carpros.com/articles/car-squeaking-noise

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.

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