rub soap on the belt
A Grand Caravan does not have a timing belt.
PUT A NEW BELT ON IT
To loosen the tension on a serpentine belt on a 2005 Grand Caravan 3.8L, turn the nut of the belt tension pulley to loosen it. Adjust the belt, then tighten the tension pulley by turning the nut in the opposite direction.
It has a timing chain.
Chain
You can spray it with a LITTLE belt dressing but don't overdo it. It also may be caused by sosmething not being alignied in the pulleys.
The 3.3L and 3.8L both have timing chains.
A 2004 Dodge Grand Caravan has one belt.
3.8L has a timing chain. 4.0L has a timing belt.
Chain
A worn belt will cause a squealing noise. The squealing noise is caused when the belt slips. Tightening the belt will temporarily fix the problem.
It varies according to who does it. Not cheap,as engine must be removed