The 98.5-02 isn't bad per say but the injection pump will need to be replaced sometime. The 03-07 are nice trucks and the injection pump is usually not a problem. They will go through injectors more so than the other years. They are real sensitive to water and trash in the fuel.
Yes, we have lots of salt in PA. But Ive never had this trouble with any other truck Ive owned. $535 for a new pan from Cummins. From Dodge, even more. $450 for AM. 02 and earlier there about $125 for AM.... I don't understand that.