GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2002 🢒 Century 🢒 Restraints 🢒 Seat Belts 🢒 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: 217474 Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the passenger front seat. Refer to Split Bench Seat Replacement or to Front Seat Replacement - Bucket in Seats.
  3. Remove the passenger front carpet retainer, then roll back the carpet.
  4. Remove the connector position assurance (CPA) from the connector to the inflatable restraint sensing and diagnostic module (SDM).

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

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

Installation Procedure

    Object Number: 238075 Size: SH
  1. Install the SDM (2) to the vehicle (3).

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

  2. Install the SDM mounting fasteners (1).

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


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

    4. Object Number: 217474 Size: SH
  4. Install the CPA to the SDM connector.
  5. Position the carpet to cover the SDM, and install the carpet retainer.
  6. Install the passenger front seat. Refer to Split Bench Seat Replacement or to Front Seat Replacement - Bucket 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 BCM Menu and press enter.
    8.3. Select the BCM Reprogramming 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.