GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2007 🢒 Rendezvous - FWD 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 Inflatable Restraint Sensing and Diagnostic Module Replacement

Removal Procedure

    Caution: Refer to SIR Caution in the Preface section.

    Caution: 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. Remove the passenger front seat. Refer to Bucket Seat Replacement .
  3. Remove the passenger front carpet retainer. Roll back the carpet.
  4. Remove the right side cowl trim panel. Refer to Cowl Side Trim Panel Replacement .
  5. Remove the right side insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Right Side .

    6. Object Number: 628375 Size: SH
  6. Remove the connector position assurance (CPA) (3) from the sensing and diagnostic module (SDM) wiring harness connector (2) on the inflatable restraint.

    7. Object Number: 628377 Size: SH
  7. Disconnect the SDM wiring harness connector (2) from the SDM (1).

    8. Object Number: 628378 Size: MH
  8. Remove the SDM mounting fasteners (1).
  9. Remove the SDM (2) from the vehicle.

Installation Procedure

    Object Number: 628378 Size: MH
  1. Remove any dirt, grease, and other contaminants from the mounting surface.
  2. Install the SDM (2) horizontally to the vehicle.
  3. Point the arrow on the SDM toward the front of the vehicle.

    4. 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.

  4. Install the SDM mounting fasteners (1).

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


    Object Number: 628377 Size: SH
  5. Install the SDM wiring harness connector (2) to the SDM (1).

    6. Object Number: 628375 Size: SH
  6. Install the CPA (3) to the SDM wiring harness connector (2).
  7. Place the carpet to cover the SDM. Install the carpet retainer.
  8. Install the right side insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Right Side .
  9. Install the right side cowl trim panel. Refer to Cowl Side Trim Panel Replacement .
  10. Install the passenger front seat. Refer to Bucket Seat Replacement .
  11. Enable the SIR system. Refer to SIR Disabling and Enabling .

    12. Important: The AIR BAG indicator may remain ON after the SDM has been replaced. DTC B1001 may set requiring the SDM part number to be set in multiple modules. If the indicator remains ON after enabling the SIR system, perform the diagnostic system check and follow the steps thoroughly to ensure that the SDM is set properly.

  12. Reprogram the BCM. Refer to Body Control Module Programming and Setup .
  13. Refer to Control Module References for programming and setup information.