Body Control Module (BCM) Flash Checksum Failure

Turn ignition on. Using scan tool, erase BCM DTCs. Turn ignition off, then on. Read DTCs. If scan tool displays BCM FLASH CHECKSUM FAILURE, reflash or replace BCM. See BODY CONTROL MODULE  under REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS. If scan tool does not display BCM FLASH CHECKSUM FAILURE, test is complete.