Combination Chemotherapy Plus Trastuzumab in Treating Patients With Advanced, Recurrent, or Metastatic Colorectal Cancer

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Monoclonal antibodies such as trastuzumab can locate tumor cells and either kill them or deliver tumor-killing substances to them without harming normal cells.
PURPOSE: This phase II trial is studying combination chemotherapy plus trastuzumab to see how well it works in treating patients with advanced, recurrent, or metastatic colorectal cancer.