GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 TrailBlazer - 4WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Ambient Light Sensor Replacement

Removal Procedure
  1. Remove the windshield garnish moldings. Refer to Windshield Pillar Garnish Molding Replacement in Interior Trim.
  2. Remove the trim pad. Refer to Instrument Panel Upper Trim Pad Replacement in Instrument Panel Gages and Console.

    3. Important: Cover the windshield defrost vents with clean shop rags.


    Object Number: 718025 Size: SH
  3. Disconnect the electrical connector from the sensor.

    4. Object Number: 729432 Size: SH
  4. In order to remove the sensor from the trim pad, rotate the sensor counter-clockwise 1/4 turn .
  5. Remove the sensor from the trim pad.

Installation Procedure

    Object Number: 729432 Size: SH
  1. Position the sensor to the trim pad.
  2. In order to install the sensor to the trim pad, rotate the sensor clockwise 1/4 turn .

    3. Object Number: 718025 Size: SH
  3. Position the trim pad to the upper portion of the instrument panel (IP).
  4. Connect the electrical connector to the sensor.
  5. Remove the shop rags from the windshield defrost vents.
  6. Install the trim pad to the IP. Refer to Instrument Panel Upper Trim Pad Replacement in Instrument Panel Gages and Console.
  7. Install the windshield garnish moldings. Refer to Windshield Pillar Garnish Molding Replacement in Interior Trim.