One of the pulleys is out of alignment,usually it is the tension pully. Replace it and problem will go away.
Here it is:
You can do that by replacing the tensioner
no!
by taking it to a mechanic
The serpentine belt on a 2003 Dodge Dakota is replaced by loosening the belt tensioner and slipping the belt off. It can then be removed from the engine accessories and a new belt installed.
There should be a diagram under the hood for that year.
Go to www.autozone.com and look under specifications, belt routing. On a 1989 Dodge Grand Caravan, the diagram is on the side of the engine where the S-belt is located.
Not sure ,but it costs $115 to change mine on my 1998 Dodge Durango.
Check all of the pulleys to make sure they are running in a straight line.
It is the item in the serpentine belt that is the lowest and furthest forward.
The belt tensioner is self-adjusting.
Rear most and lowest pulley on the serpentine belt.