One problem related to visibility has been reported for the 2004 Dodge Ram 3500. The most recently reported issues are listed below.
Started truck up let warm and defrost windows. Snowing and freezing cold temps. After warming up truck left house about 1/2 mile windows frozen over and could not see out. Pulled off road defroster was not switching to blow air on window. Just bought truck used. Local dealer informed me did 2-3 repairs a week for this but no recalls yet. Wanted 750. 00 to fix. Dodge ram trucks all series.