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Headlamp Automatic Control Ambient Light Sensor Replacement

WARNING: This page is about a different car, the 2013 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Headlamp Automatic Control Ambient Light Sensor
GM1960291Courtesy of GENERAL MOTORS COMPANY
Headlamp Automatic Control Ambient Light Sensor Replacement

Callout Component Name
Preliminary Procedure 
Remove the defroster grille. Refer to Windshield Defroster Nozzle Grille Replacement (Left Hand Drive) , Windshield Defroster Nozzle Grille Replacement (Right Hand Drive) .
1 Headlamp Auto Control Ambient Light Sensor

Procedure

  1. Disconnect the electrical connector.
  2. Twist the sensor counterclockwise.