My wifes old Geo Tracker used to squeal like all hell. I tried belts and all sortsa stuff. Some one said to coat the belt in mayonaisse over night and that would quiet it. One day I said to my self "It's dumb, but what the hell?" and coated the belt with MAYO. the whole time I felt like an ass, but the next day it was quiet. Lasted till we got rid of it a couple months later.
Just throwing it out there.