GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Cavalier 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Inflatable Restraint Sensing and Diagnostic Module Replacement

CAUTION: Be careful when you handle a sensing and diagnostic module (SDM). Do not strike or jolt the SDM. Before applying power to the SDM:

   • Remove any dirt, grease, etc. from the mounting surface
   • Position the SDM horizontally on the mounting surface
   • Point the arrow on the SDM toward the front of the vehicle
   • Tighten all of the SDM fasteners and SDM bracket fasteners to the specified torque value
Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

Removal Procedure

    Object Number: 202124 Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the passenger front seat. Refer to Seat Replacement in Seats.
  3. Remove the passenger front carpet retainer, then roll back the carpet. Refer to Carpet Retainer Replacement in Interior Trim.
  4. Remove the connector position assurance (CPA) from the inflatable restraint sensing and diagnostic module (SDM) wiring harness connector.

    5. Object Number: 202126 Size: SH
  5. Disconnect the SDM wiring harness connector from the SDM.

    6. Object Number: 202131 Size: SH
  6. Remove the SDM mounting fasteners (2).
  7. Remove the SDM (1) from the floor pan (3).

Important: The following repair procedures should only be used in the event that the inflatable restraint sensing and diagnostic module (SDM) studs and/or fasteners are damaged to the extent that the SDM can no longer be properly mounted.

First Repair

  1. Remove and discard the fastener.
  2. Use a new fastener GM P/N 10156138.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the SDM mounting fasteners (1).

    4. Tighten
    Tighten fasteners to 14 N·m (124 lb in).

Second Repair

  1. Remove and discard the fastener.
  2. Use a larger fastener GM P/N 10267482 with washer GM P/N 11500305.
  3. Install the SDM mounting fasteners (1).

    4. Tighten
    Tighten fasteners to 15 N·m (134 lb in).

Installation Procedure

    Object Number: 202131 Size: SH
  1. Install the SDM (1) to the floor pan (3).

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the SDM mounting fasteners (2).

    3. Tighten
    Tighten fasteners to 14 N·m (124 lb in).


    Object Number: 202126 Size: SH
  3. Install the SDM wiring harness connector to the SDM.

    4. Object Number: 202124 Size: SH
  4. Install the connector position assurance (CPA) to the SDM wiring harness connector.
  5. Install the carpet and the passenger front carpet retainer. Refer to Carpet Retainer Replacement in Interior Trim.
  6. Install the passenger front seat. Refer to Seat Replacement in Seats.
  7. Enable the SIR system. Refer to Enabling the SIR System .
  8. If you replaced the SDM, perform the following procedure in order to update the BCM with the new SDM part number:

    9.         Important: The AIR BAG indicator may remain ON after the SDM is replaced. After programming the SDM part number into the BCM, cycle the ignition switch OFF and ON. This turns OFF the AIR BAG indicator and clears the DTC.

    8.1. Install a scan tool.
    8.2. Select the Special Functions option from the SIR Menu and press enter.
    8.3. Select the Setup SDM Part Number in BCM option and press enter.
    8.4. Follow the procedure on the scan tool display.
    8.5. Cycle the ignition switch OFF and ON.