2000 pontiac grand am. Has a high pitched squeal on occasion. It is on the passanger side. Checked serpinten belt and no barrings seem to be bad on pully. Does not effect performance of the car. No check engine light comes on. Any ideas

Take a bar of lava soap and BE CAREFUL use it to clean the belt and pulley groves THIS IS MAJOR DANGEROUS the cars motor must be running touch the inside of the belt for about 10 seconds with the bar of lave pumas soap .OR I WOULD PREFER you bring it to a shop and ask them if they will do the bar of lava soap trick to your surp belt.. bring your own bar let em keep it ... the groves in the pulleys get built up with rubber and will make your belt squeal . the lava soap in most cases will clean the groves .. cool huh.. did i help please leave feedback.. jay

While it does a good job, it's good because it's considered an abrasive soap. But, when you use an abrasive soap on something like car paint, it accelerates the oxidation process and gives the car a dull look. Dish soap will also break down a car's wax coat and can be tough on rubber.