02 T&C alternator squeaking?

does the alt make any noise when rotated by hand?
if so, well ... if not,

with engine running spray WD on the serp belt (flat side and grooved)
a small spray will do, noise be gone? time for a belt change.

also, ck for any erratic wear patterns on the idler pulley, tensioner (sp)
pulley, and water pump pulley --- an indication of running alignment issues...

change appropriate component and install new belt.

Hopefully its a cheap fix!!