GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Century 🢒 Engine 🢒 Engine Electrical 🢒 Body Control Module (BCM) Programming/RPO Configuration

During Body Control Module (BCM) related service, the procedures below are designated to set-up the BCM correctly. Before you start, read these carefully and completely.

Important: The following procedures must be followed:

    • Read this procedure carefully and completely.
    • The BCM will not function properly if the Setup New BCM procedure is not performed.
    • Make sure the battery is fully charged.
    • Make sure all disconnected devices and connectors are reconnected.
    • Perform the Programming Theft Deterrent System Components in Theft Deterrent after successfully finishing the Setup New BCM procedure. If the Programming Theft Deterrent System Components procedure is not performed after a BCM replacement, one of the following conditions will occur:
       - The vehicle will not be protected against theft by the Passlock Sensor system.
       - The engine will not crank nor start.

Setup New Body Control Module (BCM)

NOTE: After the procedure is completed, personalization of the BCM defaults to a default setting. Inform the customer that the personalization must be set again.

The following procedure will set up the new BCM:

  1. Connect a Tech 2 to the Data Link Connector (DLC).
  2. Turn the ignition switch ON.
  3. Select "Diagnostics" and input all of the required data to select the correct vehicle when prompted by the Tech 2.
  4. Select "Body" and then "Body Control Module".
  5. Select "Special Functions".
  6. Select "New VIN" and follow the screen directions to input all required data.
  7. Exit back to the "Special Functions" menu.
  8. Select "BCM Reprogramming".
  9. The scan tool will display "Do you want to setup a Body Control Module?" At the prompt, select "Setup BCM" soft-key on the scan tool.
  10. The scan tool will display "Now setting up the new Body Control Module".
  11. When the BCM has been setup successfully, the scan tool will display "Body Control Module setup is complete".
  12. When the BCM Setup Procedure and VIN have been entered, proceed with the procedure Programming Theft Deterrent System Components in Theft Deterrent.

Theft Deterrent

Perform the procedure Programming Theft Deterrent System Components in Theft Deterrent.

Important: After programming, perform the following to avoid future misdiagnosis:

  1. Turn the ignition OFF for 10 seconds.
  2. Connect the scan tool to the data link connector.
  3. Turn the ignition ON with the engine OFF.
  4. Use the scan tool in order to retrieve history DTCs from all modules.
  5. Clear all history DTCs.