BCM Replacement
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) is pre-programmed with software and calibrations for operation when received from the plant. The requirements for replacement of the module are located in the saturn service stall (SSS) Users Guide. In general, the existing BCM information is read from the controller and stored in SSS until the new BCM is installed. Then the option content, odometer, and other vehicle specific information, from the original BCM is written into the new BCM. If the original controller is unreadable, the option content for the specific vehicle will require input. Refer to Body Control Module (BCM) Programming/RPO Configuration on the procedure for programming a BCM.