GM Service Manual Online
For 1990-2009 cars only

Body Control Module Replacement C100/Long Body

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1857732  Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the radio. Refer to Radio Replacement .
  3. Remove the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement .
  4. Remove the shift lever control assembly or housing. For Aisin-51LE Automatic transaxle. Refer to Transmission Control Replacement for D33 Manual Transaxle. Refer to Transmission Control Replacement .
  5. Disconnect the electrical connectors.
  6. Remove the body control module (BCM).

Installation Procedure


    Object Number: 1857732  Size: SH
  1. Install the BCM.
  2. Connect the electrical connectors.
  3. Install the shift lever control assembly or housing. For Aisin-51LE Automatic transaxle. Refer to Transmission Control Replacement for D33 Manual Transaxle. Refer to Transmission Control Replacement .
  4. Install the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement .
  5. Install the radio. Refer to Radio Replacement .
  6. Connect the negative battery cable.

Body Control Module Replacement C105/Short Body

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1857735  Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the radio. Refer to Radio Replacement .
  3. Remove the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement .
  4. Remove the shift lever control assembly or housing. Refer to Transmission Control Replacement for the Aisin-51LE transaxle or Transmission Control Replacement for the D33 transaxle.
  5. Disconnect the electrical connectors.
  6. Remove the body control module (BCM).

Installation Procedure


    Object Number: 1857735  Size: SH
  1. Install the body control module (BCM).
  2. Connect the electrical connectors.
  3. Install the shift lever control assembly or housing. Refer to Transmission Control Replacement for the Aisin-51LE transaxle or Transmission Control Replacement for the D33 transaxle.
  4. Install the radio. Refer to Radio Replacement .
  5. Install the HVAC control assembly. Refer Heater and Air Conditioning Control Replacement .
  6. Connect the negative battery cable.

Body Control Module Replacement X-BCM C100/Long Body

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.

    Important: The left-hand drive is shown. The right-hand drive is similar.

  1. Disconnect the negative battery cable.

  2. Object Number: 1855759  Size: SH
  3. Remove the instrument cluster. Refer to Instrument Cluster Replacement .

  4. Object Number: 1855760  Size: SH
  5. Access the X-BCM on either side of bracket hole.

  6. Object Number: 1855762  Size: SH
  7. Unlock both sides of X-BCM and remove the two nuts through the hole.
  8. Pull out the bracket through the hole.

  9. Object Number: 1855764  Size: SH
  10. Disconnect the electrical connector.
  11. Pull out the X-BCM through the hole.
  12. Important: Perform the SPO reprogramming when X-BCM module is replaced.

Installation Procedure


    Object Number: 1855762  Size: SH
  1. Connect the electrical connector.
  2. Install the X-BCM and bracket with the nuts into the hole.

  3. Object Number: 1855759  Size: SH
  4. Install the instrument cluster. Refer to Instrument Cluster Replacement .
  5. Connect the negative battery cable.

Body Control Module Replacement X-BCM C105/Short Body

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.

    Important: The left-hand drive is shown. The right-hand drive is similar.

  1. Disconnect the negative battery cable.

  2. Object Number: 1855769  Size: SH
  3. Remove the instrument cluster. Refer to Instrument Cluster Replacement .

  4. Object Number: 1855760  Size: SH
  5. Access the X-BCM on either side of bracket hole.

  6. Object Number: 1855762  Size: SH
  7. Unlock both sides of X-BCM and remove the two nuts through the hole.
  8. Pull out the bracket through the hole.

  9. Object Number: 1855764  Size: SH
  10. Disconnect the electrical connector.
  11. Pull out the X-BCM through the hole.
  12. Important: Perform the SPO reprogramming when X-BCM module is replaced.

Installation Procedure


    Object Number: 1855762  Size: SH
  1. Connect the electrical connector.
  2. Install the X-BCM and bracket with the nuts into the hole.

  3. Object Number: 1855769  Size: SH
  4. Install the instrument cluster. Refer to Instrument Cluster Replacement .
  5. Connect the negative battery cable.