Sargramostim Following Allogeneic Bone Marrow Transplantation in Treating Patients With Chronic Myelogenous Leukemia

RATIONALE: Drugs used in chemotherapy work in different ways to stop cancer cells from dividing so they stop growing or die. Combining chemotherapy with allogeneic bone marrow transplantation may allow the doctor to give higher doses of chemotherapy drugs and kill more cancer cells. Colony-stimulating factors such as sargramostim may increase the number of immune cells found in bone marrow or peripheral blood, and may help a person's immune system recover from the side effects of chemotherapy. PURPOSE: Phase II trial to study the effectiveness of allogeneic bone marrow transplantation followed by sargramostim in treating patients who have chronic myelogenous leukemia.