GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2007 🢒 ION 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Body Control Module Replacement

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the front floor console. Refer to Front Floor Console Replacement .

    3. Object Number: 877821 Size: SH
  3. Remove the wiring harness rosebud from the right center support bracket.

    4. Object Number: 877820 Size: SH
  4. Pull back the carpet at the bottom of the support bracket and remove the lower nuts.
  5. Remove the nuts and remove the bracket.

    6. Object Number: 877745 Size: SH
  6. Disconnect the small body harness connector  (1) from the body control module (BCM).
  7. Disconnect the large body harness connector  (2) from the BCM.

    8. Object Number: 877747 Size: SH
  8. Disconnect the small instrument panel (I/P) wiring harness connector  (1) from the BCM.
  9. Disconnect the large I/P wiring harness connector  (2) from the BCM.
  10. If equipped with OnStar®, disconnect the OnStar® connector.

    11. Object Number: 877750 Size: SH
  11. Remove the BCM nuts and remove the BCM from the vehicle.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 877750 Size: SH
  1. Install the BCM to the vehicle and install the retaining nuts.

    2. Tighten
    Tighten the nuts to 10 N·m (88 lb in).


    Object Number: 877747 Size: SH
  2. Connect the large I/P wiring harness connector  (2) to the BCM.
  3. Connect the small I/P wiring harness connector  (1) to the BCM.

    4. Object Number: 877745 Size: SH
  4. Connect the large body wiring harness connector  (2) to the BCM.
  5. Connect the small body wiring harness connector  (1) to the BCM.
  6. Connect the OnStar® connector.

    7. Object Number: 877820 Size: SH
  7. Pull back the carpet and position the center support bracket into position.
  8. Install the center support bracket nuts.

    9. Tighten
    Tighten the nuts to 10 N·m (88 lb in).


    Object Number: 877821 Size: SH
  9. Install the wiring harness rosebud to the center support bracket.
  10. Install the front floor console. Refer to Front Floor Console Replacement.
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  12. Program a new or a remanufactured BCM. Refer to Control Module References .