i have a 94 camaro v6 and for some reason i cant get rid of the squealng noise. I have replaced the idler pully, power stearing, belt, and alternator. Some days it does it and some it dont. Usually it will in the morning when i first start it up or when its raining it will do it. When i turn the heat or air condition on it will do it but soon as i turn the a/c or heat off thin the noise almost stops. Got any ideas??? Please help.... thanks.

 

Bear squealing can be a tough one cuase everything has bearings. AC compressor or Water pump is all that left. Ac clutch is a pretty common problem for this.

 

Considering you say it stops when the A/C is turned off, I am guessing it is the A/C clutch.