How do I fix a squeaky belt on a minivan?

possible bad pulley bearings

My first thought is v-belt or serpentine belt loose or bad, may have a problem with the belt tensioner.
If not the belts I would make sure none of the pulley bearing are going out. belt tensioner bearing also. If you remove the belts you can try moving the pulley up/down, side to side see if shaft moves may be bearing. Try spinning the pulley see if it makes the squeaking noise.
If it were a brake pad I would think the car would want to pull some to the right..
wheel bearing cv joint but my experience is wheel bearing, ball joints seem to make more of a rumble than a squeak.

Check these......................


Diagnosing Belt Noise squeak or squeal on Serpentine Belt

How to Fix Squeaky Belt figure out where the squeak is coming from

Thank you for your post, friend!

I see that you need assistance in repairing a squeaky door on your Frigidaire dishwasher. The best way to quiet down a squeaky door is to pinpoint the cause of the squeak. This could be an issue with your hinges, springs, or the cables. You can use a lubricant such as WD-40 on your those parts to see if that will help alleviate the squeaking. Hope this is helpful. -Matt

get some belt dressing spray on the belt

most likely your fan belts are loose. if they are loose they usually squeak when cold then stops squeaking when the pulleys heat up

Go to your local auto parts store and ask for fan belt conditioner. Or if they have it graphite

Sounds like the belt, you're right on track. Check the belt(s) and replace if neccesary. If belts are fine, check for tightness. Should be about a 1/4" flexibility when you push down on them. If all is ok, belt dressing should take care of the problem.
Now, if for some reason, one of the components that run off the belts may be going bad, specifically a/c compressor. If it's starting to lock up, it will make your belt squeal and finally snap.

replace light switch..and tighten fan belt GL

Replace the serpentine belt tensioner. Expect to pay approx $150.00 if installed by a mechanic.