Both my 01 Ram and 00 Town and country had the evap go at around 80-90K miles..
Chrysler ate the T&C, which also need blend door work Dealer said that job was near $2K billed to old Chrysler..
My 01 Ram was my nickel about $1200 at a local shop including a new heater core..Yes the heater core is a time bomb as well..do it while it is apart.