To replace the drive belt or serpentine belt on a Voyager check the engine size. For 2.4L engines, a serpentine belt runs the air conditioning compressor and alternator. For 3.0L models, the alternator and power steering share a belt with a separate belt for the AC. Dodge recommends checking the belts every 15,000 miles or 12 months for possible replacement. I have gone 3 yrs with one.. it will start squealing when you turn on the heater to defrost..
Most replacement belts have a diagram on the package. However, the easiest way is to pay close attention to the belt you are taking off, and replace the new one the same way. The pulleys themselves are usually 'grooved' or 'smooth' which tells you whether the front or back of the belt is against it. The hardest part is figuring out how to release tension on the idler-pulley. If you can get the belt on and the idler/tension pulley (same thing) pulls the belt tight, chances are you got the belt right. If you don't know what I mean, then the mostest best way is to get a Clymer Manual and read up. Its really a simple thing to do yourself.
I used a long heavy duty screw driver to release the tension on a Pontiac Sunbird.. the belt will only fit on one way..