Monoclonal Antibody Therapy and Colony- Stimulating Factor in Treating Patients With Metastatic Colorectal Cancer

RATIONALE: Monoclonal antibodies can locate tumor cells and either kill them or deliver tumor-killing substances to them without harming normal cells. Colony-stimulating factors such as G-CSF may increase the number of immune cells found in bone marrow or peripheral blood, and may help a person’s immune system kill more tumor cells. PURPOSE: Phase II trial to study the effectiveness of monoclonal antibody therapy plus G-CSF in treating patients with metastatic colorectal cancer that has not responded to treatment with fluorouracil.