GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Corvette 🢒 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: 391030 Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages and Console.
  3. Remove the heater and A/C control head.
  4. Remove the connector position assurance (CPA) from the inflatable restraint sensing and diagnostic module (SDM) harness connector.

    5. Object Number: 391032 Size: SH
  5. Disconnect the SDM harness connector from the SDM.

    6. Object Number: 391034 Size: SH
  6. Remove the SDM (3) mounting fasteners (2).
  7. Remove the SDM from the IP center support system (1).

Installation Procedure

    Object Number: 391034 Size: SH
  1. Install the SDM (3) to the IP center support system (1).

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

  2. Install the SDM mounting fasteners (2).

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


    Object Number: 391032 Size: SH
  3. Install the SDM harness connector to the SDM.

    4. Object Number: 391030 Size: SH
  4. Install the connector position assurance (CPA) to the SDM harness connector.
  5. Install the heater and A/C control head.
  6. Install the accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages and Console.

    7. 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.

  7. Enable the SIR system. Refer to Enabling the SIR System .