DTC C0559: Checksum Error: Testing

Perform system check. See SYSTEM CHECK  under SYSTEM TESTING. Turn ignition off. Replace PASSLOCK(R) module. See PASSLOCK(R) MODULE  under REMOVAL & INSTALLATION. Reconnect all connectors and components. Turn ignition on. Using scan tool, clear all DTCs. Perform reprogramming procedure. See PROGRAMMING  . Perform system check. See SYSTEM CHECK  under SYSTEM TESTING.