OUTLINE: Dendritic cells are taken from the leukapheresis product obtained during the peripheral blood stem cell transplant procedure performed prior to treatment on this study. The dendritic cells are pulsed with carcinoembryonic antigen (CEA) RNA. Approximately 60-90 days after the peripheral blood stem cell transplant, patients receive CEA RNA pulsed dendritic cells IV every 3 weeks for a total of 4 doses. Patients undergo a second leukopheresis after the last dose of immunotherapy to obtain specimens for immunologic tests.