GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 489061  Size: SH
  1. Disconnect the electrical connectors to the rear object sensor.

  2. Object Number: 500502  Size: SH
  3. Lift the locking tabs on the housing (4) and remove the rear object sensor (1).

  4. Object Number: 762443  Size: SH
  5. Insert a small size screw driver at (3) to release the tabs in order to remove the spring (1).

  6. Object Number: 489064  Size: SH
  7. From the inside of the housing push in the tabs and remove.

  8. Object Number: 489066  Size: SH
  9. Remove the bezel by pushing it through the fascia.

Installation Procedure

    Important: Do not refinish previously painted sensors. Excess paint build up will cause the sensor to be inoperative.

  1. Paint the new rear object sensor. Refer to Basecoat/Clearcoat Paint Systems in Paint/Coatings.
  2. Check to make sure the paint does not exceed 6 mils. Use a paint thickness gauge suitable for non-ferrous metals. Refer to Paint Gages in Paint/Coatings.

  3. Object Number: 489066  Size: SH
  4. Paint the sensor bezel to match the color of the bumper fascia.

  5. Object Number: 500505  Size: SH
  6. Align the keyhole (2) with the key (1) and press the sensor bezel into the fascia.

  7. Object Number: 489064  Size: SH
  8. Install the housing to the bezel through the back side of the fascia. The housing snaps into the cutouts on the bezel.
  9. Important: The spring keys must be on the top and bottom of the housing.


    Object Number: 489063  Size: SH
  10. Install the spring (1) to the housing (2) until fully seated.
  11. Ensure the sensor is held to the bumper fascia firmly.


    Object Number: 500502  Size: SH
  12. Install the decoupling ring (2) to the sensor (1).
  13. Insert the sensor into the housing (4) with the connector pointing toward the passenger side of the fascia. The sensor tabs snap into the cutouts on the housing (4).

  14. Object Number: 489061  Size: SH
  15. Connect the electrical connectors.