GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 648588  Size: SH
  1. Remove the windshield pillar garnish moldings. Refer to Windshield Pillar Garnish Molding Replacement in Interior Trim.
  2. Starting at the left side, carefully lift upwards on the instrument panel (I/P) upper trim panel in order to release the retainers from the I/P upper trim pad. Work towards the right in order to access the daytime running lamp (DRL) ambient light sensor.
  3. Remove the DRL ambient light sensor from the I/P upper trim panel by twisting the sensor ¼ turn counterclockwise.
  4. Remove the DRL ambient light sensor from the connector.

Installation Procedure


    Object Number: 648588  Size: SH
  1. Install the daytime running lamp (DRL) ambient light sensor to the DRL ambient light sensor connector.
  2. Position the DRL ambient light sensor to the opening in the I/P upper trim panel. Twist the DRL ambient light sensor ¼ turn clockwise.
  3. Verify that the DRL ambient light sensor wiring harness will not be pinched when the I/P upper trim panel is installed. Working from right to left, press down on the I/P upper trim panel in order to engage the retainers to the I/P upper trim pad.
  4. Install the windshield pillar garnish moldings. Refer to Windshield Pillar Garnish Molding Replacement in Interior Trim.