GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1548560  Size: SH
  1. Remove the instrument panel (I/P) carrier. Refer to Instrument Panel Carrier Replacement .
  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
  5. Open the HVAC passenger compartment air filter access door.

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

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

  10. Object Number: 1548546  Size: SH
  11. Remove the air inlet housing bolts/screws (1).

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

  14. Object Number: 1548539  Size: SH
  15. Remove the air inlet case bolts/screws (2).
  16. Separate the air inlet case halves.
  17. 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.

  4. Install the air inlet case bolts/screws (2).
  5. Tighten
    Tighten the bolts/screws to 1.2 N·m (11 lb in).


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

  7. Object Number: 1548546  Size: SH
  8. Install the air inlet housing bolts/screws (1).
  9. Tighten
    Tighten the bolts/screws to 1.2 N·m (11 lb in).


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

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

  13. Object Number: 1547638  Size: SH
  14. Close the HVAC passenger compartment air filter access door.
  15. Install the I/P carrier. Refer to Instrument Panel Carrier Replacement .
  16. Re-calibrate the actuators. Refer to Actuator Recalibration .