Upon cold startup there is a squeal only if A/C is on?

Hello,

It sounds like the belt is worn and making that noise. If the squeal goes away after the engine has warmed up it is a sign of a belt that is slipping just enough to make the squealing noise. This is typically noticeable when the engine is under load, like when the A/C is on.

Take a look at this helpful guide:

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

I have attached the belt replacement procedures below for your reference.

Let me know of any questions.
Thank you.