GM Service Manual Online
For 1990-2009 cars only

Introduction

During body control module (BCM) related service, there are several procedures designated to set-up the BCM correctly. Before you start, carefully and completely read these procedures .

Setup New Body Control Module (BCM)

Tools Required

Scan Tool

Important: 

   • Carefully and completely read the BCM set-up procedures.
   • The BCM will not function properly if the Setup New BCM Procedure is not performed.
   • Perform the Theft Deterrent Re-Learn procedure after successfully finishing the Setup New BCM Procedure. If the Theft Deterrent Re-Learn procedure is not performed after a BCM replacement, the following conditions may occur:
      - The vehicle will not be protected against theft by the PASS-Key® II system.
      - The engine will not start.

  1. Connect a Scan Tool to the data link connector in the vehicle.
  2. Input all of the required data when prompted by the Scan Tool .
  3. Turn the ignition switch to the RUN position.
  4. Select BODY CONTROL MODULE.
  5. Select SPECIAL FUNCTIONS.
  6. Select New VIN and 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 hotspot on the scan tool.
  10. The scan tool will display: NOW SETTING UP THE NEW BODY CONTROL MODULE.
  11. Perform the Theft Deterrent Re-Learn procedure after entering the new VIN information and successfully finishing the Setup New BCM Procedure. If the Theft Deterrent Re-Learn procedure is not performed after a BCM replacement, the following conditions may occur:
  12. • The vehicle will not be protected against theft by the PASS-Key® II system.
    • The engine will not crank or start.

Theft Deterrent Re-Learn

Perform this procedure under the following conditions:

    • The BCM has been replaced.
    • The Setup New BCM procedure has been completed successfully.

Use 1 of the following 3 Theft Deterrent Re-Learn procedures, depending on the type of Techline equipment available:

  1. Techline terminal and a Scan Tool (the quickest method)
  2. T-50 or T-60
  3. Re-Learn without a Scan Tool or Techline equipment (the slowest method)

Theft Deterrent Re-Learn Using a Techline Terminal and a Scan Tool

  1. Connect the Scan Tool to the DLC on the vehicle.
  2. At the Scan Tool main menu, select SERVICE PROGRAMMING.
  3. Enter the requested information.
  4. Select REQUEST INFO.
  5. Disconnect the Scan Tool from the vehicle.
  6. Connect the Scan Tool to the Techline terminal.
  7. Select SERVICE PROGRAMMING SYSTEM (SPS).
  8. Select TERMINAL TO TECH 2 PROGRAMMING.
  9. Select DONE.
  10. Follow the instructions on the Techline terminal to Handheld Communications Setup screen.
  11. Select THEFT MODULE RE-LEARN.
  12. Select PROGRAM at the summary screen.
  13. The terminal will download information to the Scan Tool .

  14. Disconnect the Scan Tool from the Techline terminal.
  15. Connect the Scan Tool to the DLC on the vehicle.
  16. At the Scan Tool main menu, select SERVICE PROGRAMMING.
  17. Answer the question prompted by the Scan Tool .
  18. Select RE-LEARN.
  19. The powertrain control module (PCM) and the BCM will be prepared for re-learn.
  20. A security timer will turn on for approximately 10 minutes. During the 10 minute wait period, ensure that the Scan Tool remains connected to the vehicle.
  21. Turn the ignition switch to the OFF position when the PCM and the BCM are prepared to re-learn.
  22. Turn the ignition switch to the START position.
  23. The engine should start when the ignition key is turned to the START position.

  24. Disconnect the Scan Tool from the DLC.

Theft Deterrent Re-Learn Using a T-50 or T-60

  1. Enter the T-50 or T-60 Service Programming System (SPS).
  2. Select TERMINAL TO VEHICLE PROGRAMMING.
  3. Select DONE.
  4. Follow the instructions on the VEHICLE SETUP screen.
  5. Select THEFT MODULE RE-LEARN.
  6. Follow the instructions on the remaining screens.
  7. The PCM and the BCM will be prepared for re-learn.
  8. A security timer will turn on for approximately 10 minutes. During the 10 minute wait period, ensure that the T-50 or T-60 terminal remains connected to the vehicle.
  9. When the PCM and the BCM are prepared to re-learn, turn the ignition switch to the OFF position.
  10. Turn the ignition switch to START position.
  11. The vehicle should now start.

Theft Deterrent Re-Learn Without Scan Tool or Techline Equipment

The duration of this procedure is approximately 30 minutes. Ensure that the battery is fully charged before proceeding. Refer to Engine Electrical for more information.

  1. Turn the ignition switch to the LOCK position
  2. Turn the ignition switch to the RUN position.
  3. SECURITY will turn on and remain on for at least 10 minutes.
  4. Turn the ignition switch to the LOCK position for five seconds.
  5. Turn the ignition switch to the RUN position.
  6. SECURITY will turn on and remain on for at least 10 minutes.
  7. Turn the ignition switch to the LOCK position for five seconds.
  8. Turn the ignition switch to the RUN position.
  9. SECURITY will turn on and remain on for at least 10 minutes.
  10. Turn the ignition switch to the LOCK position for five seconds.
  11. Turn the ignition switch to the LOCK position
  12. Turn the ignition switch all the way to the START position. The engine should now start.
  13. Inspect for BCM diagnostic trouble codes (DTCs).

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.