One problem related to gas recirculation valve (egr valve) has been reported for the 1999 Dodge Grand Caravan. The most recently reported issues are listed below.
The tensioner pulley must have a bad spring or seal and as it separates the pulley goes a few degrees out of alignment with other pulley members which causes belt to either ride up on the ridge of the altenator pulley and shred or completely fall off all together. Naturally all power is lost as well as engine pumps. . . Best case you are able to pull off on the shoulder otherwise there could be impending danger. 44k miles and this part is failing and from what I understand quite regularly with this make & model. Problem needs addressed. Thank you.