GM Service Manual Online
For 1990-2009 cars only

Caution: Be careful when you handle a sensor. Do not strike or jolt a sensor. Before applying power to a sensor:

   • Remove any dirt, grease, etc. from the mounting surface.
   • Position the sensor horizontally on the mounting surface.
   • Point the arrow on the sensor toward the front of the vehicle.
   • Tighten all of the sensor fasteners and sensor 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: 202134  Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the hood closeout filler panel. Refer to Hood Close Out Filler Replacement in Body Front End.
  3. Remove the connector position assurance (CPA) from the wiring harness connector to the inflatable restraint front end discriminating sensor.

  4. Object Number: 202138  Size: SH
  5. Disconnect the wiring harness connector from the sensor.

  6. Object Number: 202141  Size: SH
  7. Remove the mounting bolts (2) from the sensor (1).
  8. Remove the sensor (1) from the hood latch support bracket (3).

Installation Procedure


    Object Number: 202141  Size: SH
  1. Install the inflatable restraint front end discriminating sensor (1) to the hood latch support bracket (3).
  2. 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.

  3. Install the mounting bolts (2) to the sensor.
  4. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 202138  Size: SH
  5. Connect the wiring harness connector to the sensor.

  6. Object Number: 202134  Size: SH
  7. Install the CPA to the wiring harness connector.
  8. Install the hood closeout filler panel. Refer to Hood Close Out Filler Replacement in Body Front End.
  9. Enable the SIR system. Refer to Enabling the SIR System .