GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 XLR 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 Air Temperature Door Replacement - Left Side

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

    Object Number: 1224339 Size: SH
  1. Remove the HVAC module. Refer to HVAC Module Assembly Replacement.
  2. Remove and discard the HVAC module assembly foam seal.

    3. Object Number: 1224374 Size: SH
  3. Disconnect the LH air temperature actuator electrical connector.
  4. Remove the LH air temperature actuator screws.
  5. Remove the LH air temperature actuator.

    6. Object Number: 1224318 Size: SH
  6. Disconnect the RH air temperature actuator electrical connector.
  7. Remove the RH air temperature actuator screws.
  8. Remove the RH air temperature actuator.

    9. Object Number: 1226250 Size: SH
  9. Disconnect the discharge temperature management (DTM) sensor electrical connectors.
  10. Disconnect the HVAC module wiring harness retainer pin (2) from the HVAC module.
  11. Disconnect the wiring harness from the heater core cover wire harness retainer (1) and reposition the wiring harness aside.
  12. Disconnect the wiring harness from the heater core cover wire harness retainer (3) and reposition the wiring harness aside.

    13. Object Number: 1224370 Size: SH
  13. Remove the heater cover screws.
  14. Remove the heater cover from the HVAC module.

    15. Object Number: 1224297 Size: SH
  15. Remove the heater core from the HVAC module.

    16. Object Number: 1224373 Size: SH
  16. Remove the HVAC module case retaining screws.

    17. Object Number: 1224310 Size: SH
  17. Separate the HVAC module upper case from the HVAC module lower case.

    18. Object Number: 1230235 Size: SH
  18. Lift up on the LH and RH air temperature doors to disconnect from one another.

    19. Object Number: 1230229 Size: SH
  19. Remove the LH air temperature door from the HVAC module.

Installation Procedure

    Object Number: 1230229 Size: SH
  1. Install the LH air temperature door to the HVAC module.

    2. Object Number: 1230235 Size: SH
  2. Lift up on the LH and RH air temperature doors to connect to one another.

    3. Object Number: 1224310 Size: SH
  3. Install the HVAC module upper case to the HVAC module lower case.

    4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1224373 Size: SH
  4. Install the HVAC module case retaining screws and tighten to 1.6 N·m (14 lb in).

    5. Object Number: 1224308 Size: SH
  5. Install a new foam seal to the heater core.

    6. Object Number: 1224297 Size: SH
  6. Install the heater core to the HVAC module.
  7. Install the heater cover to the HVAC module.

    8. Object Number: 1224370 Size: SH
  8. Install the heater cover screws and tighten to 1.6 N·m (14 lb in).

    9. Object Number: 1226250 Size: SH
  9. Reposition the HVAC wiring harness and connect the wiring harness to the heater core cover wiring harness retainer (1).
  10. Reposition the HVAC wiring harness and connect the wiring harness to the heater core cover wiring harness retainer (3).
  11. Connect the HVAC module wiring harness retainer pin (2) to the HVAC module.
  12. Connect the discharge temperature management (DTM) sensor electrical connectors.
  13. Install the RH air temperature actuator.
  14. Install the RH air temperature actuator screws and tighten to 1.6 N·m (14 lb in).

    15. Object Number: 1224318 Size: SH
  15. Connect the RH air temperature actuator electrical connector.
  16. Install the LH air temperature actuator.
  17. Install the LH air temperature actuator screws and tighten to 1.6 N·m (14 lb in).

    18. Object Number: 1224374 Size: SH
  18. Connect the LH air temperature actuator electrical connector.
  19. Install the HVAC module. Refer to HVAC Module Assembly Replacement.