GM Service Manual Online
For 1990-2009 cars only

Defroster Grille Replacement w/o HUD

Removal Procedure


    Object Number: 428499  Size: SH
  1. Remove the defroster grille by carefully prying upward in order to release the retainers.
  2. Disconnect the electrical connector from the sensor (1).
  3. Twist the sensor counterclockwise to remove.

Installation Procedure


    Object Number: 428499  Size: SH
  1. Align the lock tabs on the sensor (1) to the openings in the defroster grill (2).
  2. Twist the sensor clockwise in order to secure the sensor to the defroster grill.
  3. Connect the electrical connector to the sensor.
  4. Align the tabs on the defroster grill to the openings in the IP carrier.
  5. Install the defroster grille to the carrier by pressing down in order to secure.

Defroster Grille Replacement with HUD

Removal Procedure


    Object Number: 428500  Size: SH
  1. Remove the defroster grille by carefully prying upward in order to release the retainers.
  2. Disconnect the electrical connector from the sensor (1).
  3. Twist the sensor counterclockwise to remove.

Installation Procedure


    Object Number: 428500  Size: SH
  1. Align the lock tabs on the sensor (1) to the openings in the defroster grill (2).
  2. Twist the sensor clockwise in order to secure the sensor to the defroster grill.
  3. Connect the electrical connector to the sensor.
  4. Align the tabs on the defroster grill to the openings in the IP carrier.
  5. Install the defroster grille to the carrier by pressing down in order to secure.