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.

Caution: If the vehicle interior is exposed to moisture and becomes soaked up to the level of the sensing and diagnostic module (SDM), the SDM and SDM harness connector must be replaced. The SDM could be activated when powered, which could cause airbag deployment and result in personal injury.

1. Disable the SIR system. Refer to SIR Disabling and Enabling .



2. Remove the passenger front seat. Refer to Front Seat Replacement - Bucket in Seats.
3. Remove the front carpet retainer. Refer to Front Carpet Retainer Replacement in Interior Trim.
4. Remove the center pillar lower trim panel. Refer to Center Pillar Lower Trim Panel Replacement in Interior Trim.
5. Remove the right closeout/insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Right Side in Instrument Panel, Gages, and Console.
6. Lift the carpet to access the sensing and diagnostic module (SDM).
7. Remove the connector position assurance (CPA) from the wiring harness connector of the inflatable restraint SDM.



8. Disconnect the SDM wiring harness connector.



9. Remove the SDM mounting fasteners (1).
10. Remove the SDM (2) from the floor pan (3).

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



2. Install the SDM (2) horizontally to the floor pan (3).
3. Point the arrow on the SDM toward the front of the vehicle.

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).

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

Important: If the SDM mounting holes or fasteners are damaged to the extent that the module can no longer be properly mounted, use the following repair. Torque the replacement fastener with a hand tool in order to prevent stripping the replacement fastener.

First Repair

4.1.	Remove and discard the stripped fastener (1).

4.2.	Install the SDM (2) with new fastener GM P/N 10156138.

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

Second Repair

4.1.	Remove and discard the stripped fastener (1).

4.2.	Install the SDM (2) using a larger fastener GM P/N 10267482 with a washer GM P/N 11500305.

Tighten
Tighten the fastener to 5 N·m (44 lb in).




1. Install the SDM wiring harness connector.



2. Install the CPA to the SDM wiring harness connector.
3. Install the carpet and the front carpet retainer. Refer to Front Carpet Retainer Replacement in Interior Trim.
4. Install the center pillar lower trim panel. Refer to Center Pillar Lower Trim Panel Replacement in Interior Trim.
5. Install the right closeout/insulator panel. Refer to Instrument Panel Insulator Panel Replacement - Right Side in Instrument Panel, Gages, and Console.
6. Install the passenger front seat. Refer to Front Seat Replacement - Bucket in Seats.

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 SIR Disabling and Enabling .