GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Impala 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Inflatable Restraint Front End Discriminating Sensor Replacement

Removal Procedure

    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.

  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the radiator upper air baffle and deflector. Refer to Radiator Air Upper Baffle and Deflector Replacement in Engine Cooling.

    3. Object Number: 809058 Size: SH
  3. Remove the orange connector position assurance (CPA) (2) from the yellow sensor harness connector (3).
  4. Disconnect the sensor harness connector from the sensor (1).

    5. Object Number: 809051 Size: SH
  5. Remove the sensor bolts (1).
  6. Remove the sensor (2) from the upper radiator core support (3).

Installation Procedure

    Object Number: 809058 Size: SH
  1. Connect the sensor harness connector (3) to the sensor (1).
  2. Install the orange CPA (2) into the yellow sensor harness connector (3).

    3. Object Number: 809051 Size: SH

    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. Position the sensor on the upper radiator core support (3). Install the sensor bolts (1).

    4. Tighten
    Tighten the bolts to 9 N·m (80 lb in).

  4. Enable the SIR system. Refer to Enabling the SIR System .
  5. Install the radiator upper air baffle and deflector. Refer to Radiator Air Upper Baffle and Deflector Replacement in Engine Cooling.