GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Terraza 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Recirculation Door Replacement

Removal Procedure

    Object Number: 1548560 Size: SH
  1. Remove the instrument panel (I/P) carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages, and Console.
  2. Disconnect the evaporator temperature sensor electrical connector (1).
  3. Remove the evaporator temperature sensor electrical connector (2) from the case.

    4. Object Number: 1547638 Size: SH
  4. Open the HVAC passenger compartment air filter access door.

    5. Object Number: 1547640 Size: SH
  5. Remove the HVAC passenger compartment air filters.

    6. Object Number: 1548559 Size: SH
  6. Disconnect the recirculation actuator electrical connector (1).

    7. Object Number: 1548546 Size: SH
  7. Remove the air inlet housing bolts/screws.

    8. Object Number: 1548550 Size: SH
  8. Remove the air inlet housing.

    9. Object Number: 1548539 Size: SH
  9. Remove the air inlet case bolts/screws (2).
  10. Separate the air inlet case halves.
  11. Remove the recirculation door (4).

Installation Procedure

    Object Number: 1548539 Size: SH
  1. Install the recirculation door (4).
  2. Align and install the left case to the right case.

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

  3. Install the air inlet case bolts/screws (2).

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


    Object Number: 1548550 Size: SH
  4. Install the air inlet housing.

    5. Object Number: 1548546 Size: SH
  5. Install the air inlet housing bolts/screws.

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


    Object Number: 1548559 Size: SH
  6. Connect the recirculation actuator electrical connector (1).

    7. Object Number: 1547640 Size: SH
  7. Install the HVAC passenger compartment air filters.

    8. Object Number: 1547638 Size: SH
  8. Close the HVAC passenger compartment air filter access door.
  9. Install the I/P carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages, and Console.
  10. Re-calibrate the actuators. Refer to Actuator Recalibration .