GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Impala 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Inflatable Restraint Sensing and Diagnostic Module Replacement

Inflatable Restraint Sensing and Diagnostic Module Replacement AK5

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. Object Number: 300146 Size: SH
  2. Remove the passenger front seat. Refer to Front Seat Replacement - Bucket in Seats.
  3. Remove the passenger front carpet retainer. Roll back the carpet.
  4. Remove the connector position assurance (CPA) from the wiring harness connector of the sensing and diagnostic module (SDM).
  5. Disconnect the wiring harness connector from the SDM.

    6. Object Number: 300147 Size: SH
  6. Remove the SDM mounting fasteners (3).
  7. Remove the SDM (1) from the floor pan (2).

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

    2. Object Number: 300147 Size: SH
  2. Install the SDM (1) horizontally to the floor pan (2).
  3. Point the arrow on the SDM toward the front of the vehicle.

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

  4. Install the SDM mounting fasteners (3).

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


    Object Number: 300146 Size: SH
  5. Install the wiring harness connector to the SDM.
  6. Install the CPA to the SDM wiring harness connector.
  7. Install the carpet and the passenger front carpet retainer.
  8. Install the passenger front seat. Refer to Front Seat Replacement - Bucket in Seats.

    9. 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.

  9. Enable the SIR system. Refer to SIR Disabling and Enabling .

Inflatable Restraint Sensing and Diagnostic Module Replacement AJ7

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. Object Number: 300148 Size: SH
  2. Remove the passenger front seat. Refer to Front Seat Replacement - Bucket in Seats.
  3. Remove the passenger front carpet retainer. Roll back the carpet.
  4. Remove the connector position assurance (CPA) from the 8-way wiring harness connector on the sensing and diagnostic module (SDM).
  5. Disconnect the 8-way wiring harness connector from the SDM.
  6. Remove the CPA from the 18-way wiring harness connector (2).
  7. Disconnect the 18-way wiring harness connector from the SDM.

    8. Object Number: 300149 Size: SH
  8. Remove the SDM mounting fasteners (3).
  9. Remove the SDM (1) from the floor pan (2).

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

    2. Object Number: 300149 Size: SH
  2. Install the SDM (1) horizontally to the floor pan (2).
  3. Point the arrow on the SDM toward the front of the vehicle.

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

  4. Install the SDM mounting fasteners (3).

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


    Object Number: 300148 Size: SH
  5. Install the 18-way wiring harness connector to the SDM.
  6. Install the CPA to the 18-way wiring harness connector.
  7. Install the 8-way wiring harness connector to the SDM.
  8. Install the CPA to the 8-way wiring harness connector.
  9. Install the carpet and the passenger front carpet retainer.
  10. Install the passenger front seat. Refer to Front Seat Replacement - Bucket in Seats.

    11. 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.

  11. Enable the SIR system. Refer to SIR Disabling and Enabling .