GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 CTS - RHD 🢒 Restraints 🢒 SIR 🢒 Inflatable Restraint Side Impact Sensor Replacement

Removal Procedure

    Caution: Refer to SIR Caution in the Preface section.

    Caution: Do not strike or jolt the inflatable restraint side impact sensor (SIS). Before applying power to the SIS make sure that it is securely fastened. Failure to observe the correct installation procedures could cause SIR deployment, personal injury, or unnecessary SIR system repairs.

  1. Disable the SIR system. Refer to SIR Disabling and Enabling or SIR Disabling and Enabling .
  2. Move the seat to the full forward position.
  3. Remove the center pillar trim panel. Refer to Center Pillar Garnish Molding Replacement in Interior Trim.

    4. Object Number: 751939 Size: SH
  4. Remove the connector position assurance (CPA) (1) from the harness connector (2) to the inflatable restraint side impact sensor (SIS).
  5. Disconnect the harness connector (2) from the SIS (3).

    6. Object Number: 751940 Size: SH
  6. Remove the SIS mounting fasteners (2).
  7. Remove the SIS (1) from the center pillar.

Installation Procedure

    Object Number: 751940 Size: SH
  1. Remove any dirt, grease, or other impurities from the mounting surface.
  2. Install the SIS (1) to the center pillar.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the SIS mounting fasteners (2).

    4. Tighten
    Tighten the fasteners to 9 N·m (80 lb in).


    Object Number: 751939 Size: SH
  4. Install the harness connector (2) to the SIS (3).
  5. Install the CPA (1) to the SIS harness connector (2).
  6. Install the center pillar trim. Refer to Center Pillar Garnish Molding Replacement in Interior Trim.
  7. Move the seat to the original position.
  8. Enable the SIR system. Refer to SIR Disabling and Enabling or SIR Disabling and Enabling .