terrible squeak

Have you tried spraying wd40 or some type of lubricant spray on each pulley as the motor runs? this happened on my cavalier..since i had the pulley assembly from a cobalt (i supercharged it) the idler pulley was the culprit. after spraying it, the squeak has been gone for months.
To locate the source, you can either use a $15 mechanic's stethoscope or put a long metal rod up to your ear. (This is a little more hazardous.) You can then probe by touching the cases of the alt, p/s pump, water pump, etc. to find the source. Either method will amplify the sound coming from the specific component.
Hopefully, just 1 will be noisy!


