GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 Terraza Ext. 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 Defroster Door Replacement

Removal Procedure

    Object Number: 1548540 Size: SH

    Important: The defroster door must be closed to allow clearance during defroster duct removal.

  1. Set the HVAC controls in the vent setting to close the defroster door.
  2. Remove the instrument panel (I/P) carrier. Refer to Instrument Panel Carrier Replacement .
  3. Remove the defroster cover bolts/screws (1).
  4. Remove the defroster cover (2).
  5. Remove the defrost actuator bolts/screws (4).
  6. Remove the defrost actuator (3).
  7. Remove the defrost actuator door (5).

Installation Procedure

    Object Number: 1548540 Size: SH
  1. Install the defrost actuator door (5).
  2. Install the defrost actuator (3).

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the defrost actuator bolts/screws (4).

    4. Tighten
    Tighten the bolts/screws to 1.2 N·m (11 lb in).

  4. Install the defroster cover (2).
  5. Install the defroster cover bolts/screws (1).

    6. Tighten
    Tighten the bolts/screws to 1.2 N·m (11 lb in).

  6. Install the I/P carrier. Refer to Instrument Panel Carrier Replacement .
  7. Re-calibrate the actuators. Refer to Actuator Recalibration .