GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 STS 🢒 HVAC 🢒 HVAC - Automatic 🢒 Air Conditioning Refrigerant Temperature Sensor Replacement

Removal Procedure
  1. Remove the HVAC module. Refer to HVAC Module Assembly Replacement.
  2. Disconnect all associated wiring connections attached to the HVAC module.
  3. Remove heater core. Refer to Heater Core Replacement.
  4. Remove the right side air temperature actuator and linkage. Refer to Temperature Valve Actuator Replacement - Right Side.

    5. Object Number: 1379002 Size: SH
  5. Remove the HVAC module case screws.

    6. Object Number: 1379007 Size: SH
  6. Remove the HVAC module retainer clips.

    7. Object Number: 1378984 Size: SH
  7. Separate the HVAC module case.

    8. Object Number: 1378986 Size: SH
  8. Reposition the evaporator core to access the evaporator sensor.

    9. Object Number: 802751 Size: SH
  9. Remove the evaporator sensor and harness from the evaporator core.

Installation Procedure
  1. Add refrigerant oil to the evaporator core. Refer to Refrigerant System Capacities.
  2. Install the new evaporator core seals to evaporator.

    3. Object Number: 802751 Size: SH
  3. Install the evaporator sensor and harness to the evaporator.

    4. Object Number: 1378986 Size: SH
  4. Install the evaporator core.

    5. Object Number: 1378984 Size: SH
  5. Connect the HVAC module case halves together.

    6. Object Number: 1379003 Size: SH
  6. Reposition and connect the HVAC Module wiring harness (1).

    7. Object Number: 1379007 Size: SH
  7. Install the HVAC module retainer clips.

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


    Object Number: 1379002 Size: SH
  8. Install the HVAC module case screws and tighten to 1 N·m (9 lb in).
  9. Install the right side air temperature actuator and linkage. Refer to Temperature Valve Actuator Replacement - Right Side.
  10. Install the heater core. Refer to Heater Core Replacement.
  11. Reconnect all associated wiring connections attached to the HVAC module.
  12. Install the HVAC module. Refer to HVAC Module Assembly Replacement.