GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 LaCrosse 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Inflatable Restraint Sensing and Diagnostic Module Replacement

Removal Procedure

    Warning: Refer to SIR Warning in the Preface section.

    Warning: Do not strike or jolt the inflatable restraint sensing and diagnostic module (SDM). Before applying power to the SDM, make sure that it is securely fastened with the arrow facing toward the front of the vehicle. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.

  1. Disable the SIR system. Refer to SIR Disabling and Enabling.

    2. Object Number: 217474 Size: SH
  2. Remove the passenger front seat. Refer to Front Seat Replacement - Bucket.
  3. Remove the right side, center pillar, lower trim panel. Refer to Center Pillar Lower Trim Panel Replacement.
  4. Remove the right insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Right Side.
  5. Reposition the front and rear door weather-strips as required.
  6. Lift up the carpet to access the inflatable restraint sensing and diagnostic module (SDM).
  7. Remove the connector position assurance (CPA) from the connector to the SDM.

    8. Object Number: 217475 Size: SH
  8. Disconnect the connector from the SDM.

    9. Object Number: 238075 Size: SH
  9. Remove the SDM mounting fasteners (1).
  10. Remove the SDM (2) from the floor pan (3).

Installation Procedure
  1. Remove any dirt, grease, or other impurities from the mounting surface.

    2. Object Number: 238075 Size: SH
  2. Install the SDM (2) horizontally to the vehicle (3).
  3. Point the arrow on the SDM toward the front of the vehicle.

    4. Caution: Refer to Fastener Caution in the Preface section.

  4. Install the SDM mounting fasteners (1).

    5. Tighten
    Tighten the fasteners to 10 N·m (89 lb in).


    Object Number: 217475 Size: SH
  5. Connect the connector to the SDM.

    6. Object Number: 217474 Size: SH
  6. Install the CPA to the SDM connector.
  7. Position the carpet to cover the SDM.
  8. Reposition the front and rear door weather-strips as required.
  9. Install the center pillar, lower trim panel. Refer to Center Pillar Lower Trim Panel Replacement.
  10. Install the right insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Right Side.
  11. Install the passenger front seat. Refer to Front Seat Replacement - Bucket.
  12. Enable the SIR system. Refer to SIR Disabling and Enabling.
  13. If you replaced the SDM, Refer to Control Module References for programming and setup information.