GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Refer to SIR Caution in the Preface section.


    Object Number: 189098  Size: SH
  1. Disable the SIR system. Refer to SIR Disabling and Enabling .
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Disconnect the inflatable restraint front end discriminating sensor harness connector located at the top of the frame (1).
  4. Remove the bolts (2).
  5. Remove the inflatable restraint front end discriminating sensor (3) from the cradle.

Installation Procedure

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

  2. Object Number: 189098  Size: SH
  3. Install the front end discriminating sensor horizontally to the top of the frame.
  4. Point the arrow on the sensor toward the front of the vehicle.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. Install the inflatable restraint front end discriminating sensor mounting fasteners (2).
  7. Tighten
    Tighten fastener to 6.5 N·m (58 lb in).

    Important: The following procedures should be utilized in the event that sensor mounting holes or fasteners are damaged to the extent that the sensor may no longer be properly mounted.

  8. Perform the following steps in order to complete the first fastener repair:
  9. 5.1. Remove and discard the improperly installed rivet.
    5.2. Reattach the sensor with a new rivet.
  10. Perform the following steps, if needed, in order to complete a second fastener repair:
  11. 6.1. Remove the improperly installed rivet.
    6.2. Enlarge the mounting holes in the lower radiator support to 9.0 mm (0.35 in).
    6.3. Insert and properly seat the rivnut.
    6.4. Install the screw to the sensor.

    Tighten
    Tighten fasteners to 6.5 N·m (58 lb in).

  12. Connect the inflatable restraint front end discriminating sensor harness connector to the sensor.
  13. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  14. Enable the SIR system. Refer to SIR Disabling and Enabling .