You will see coolant leakage from the weep hole below the impeller shaft pulley, if the shaft seal is dying. If not, then check all the hoses, especially the short fellow between the pump and the head. That one is famous for leaking quietly.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.