GM Service Manual Online
For 1990-2009 cars only

Body Control Module Replacement C100/Long Body

Removal Procedure

    Warning: Refer to Battery Disconnect Warning 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 heating, ventilation, air conditioning (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 6T40/6T45 automatic transmission, Transmission Control Replacementfor the AF33-5 automatic transaxle, or Transmission Control Replacement for the D33 manual transmission.
  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. Refer to Transmission Control Replacement for the 6T40/6T45 automatic transmission, Transmission Control Replacementfor the AF33-5 automatic transaxle, or Transmission Control Replacement for the D33 manual transmission.
  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

    Warning: Refer to Battery Disconnect Warning 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 heating, ventilation and air conditioning (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 6T40/6T45 automatic transmission, Transmission Control Replacementfor the AF33-5 automatic transaxle, or Transmission Control Replacement for the D33 manual transmission.
  5. Disconnect the electrical connectors.
  6. Remove the body control module (BCM).

Installation Procedure


    Object Number: 1857735  Size: SH
  1. Install the BCM.
  2. Connect the electrical connectors.
  3. Install the shift lever control assembly or housing. Refer to Transmission Control Replacement for the 6T40/6T45 automatic transmission, Transmission Control Replacementfor the AF33-5 automatic transaxle, or Transmission Control Replacement for the D33 manual transmission.
  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.