GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2002 🢒 Montana - 4WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 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
  1. Disable the SIR system. Refer to Disabling the SIR System
  2. Remove the passenger front seat. Refer to Bucket Seat Replacement in Seats.
  3. Remove the passenger front carpet retainer, then roll back the carpet.

    4. Object Number: 260605 Size: SH
  4. Push the locking tab and release the connector position assurance (CPA) from the inflatable restraint sensing and diagnostic module (SDM) wiring harness connector (2).

    5. Object Number: 260607 Size: SH
  5. Disconnect the SDM wiring harness connector (3) from the SDM (1).

    6. Object Number: 260608 Size: MH
  6. Remove the SDM mounting fasteners (1).
  7. Remove the SDM (2) from the vehicle.

Installation Procedure

    Object Number: 260608 Size: MH
  1. Install the SDM (2) to the vehicle.

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

  2. Install the SDM mounting fasteners (1).

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

First Repair

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

    2.1. Remove and discard the fastener.
    2.2. Use a new fastener GM P/N 10156138.
    2.3. Install the SDM mounting fasteners (1).

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

Second Repair

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

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


    Object Number: 260607 Size: SH
  1. Install the SDM wiring harness connector (3) to the SDM (1).

    2. Object Number: 260605 Size: SH
  2. Install the connector position assurance (CPA) to the SDM wiring harness connector (2).
  3. Position the carpet to cover the SDM then install the carpet retainer.
  4. Install the passenger front seat. Refer to Bucket Seat Replacement in Seats.

    5. 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.

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