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Installation Procedure

WARNING: This page is about a different car, the 2006 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Do not tamper, adjust or disassemble the mode valve assembly. The proper setting of the pretensions on the springs is critical to the film valve function.
    Fig 1: Identifying Mode Valve Assembly
    GM1224371Courtesy of GENERAL MOTORS CORP.
  1. Install the mode valve assembly.
  2. Install the heater core cover.
    Fig 2: Identifying Heater Cover Screws
    GM1224370Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FUEL AND EVAPORATIVE EMISSION (EVAP) HOSE/PIP in Cautions and Notices.
  3. Install the heater core cover screws.

    Tighten:  Tighten the screws to 1.6 N.m (14 lb in).

  4. Connect the wiring harness to the heater core cover wire harness retainer (2).
    5. Fig 3: Identifying Heater Core Cover Wire Harness Retainer & HVAC Module Wiring Harness Retainer Pin
    GM1226250Courtesy of GENERAL MOTORS CORP.
  5. Connect the HVAC module wiring harness retainer pin (1) to the HVAC module.
  6. Connect the DTM sensor electrical connectors.
    7. Fig 4: Identifying Mode Valve Assembly Retaining Screws
    GM1224372Courtesy of GENERAL MOTORS CORP.
  7. Install the mode valve assembly retaining screws.

    Tighten:  Tighten the screws to 1.6 N.m (14 lb in).

    Fig 5: Mode Actuator Electrical Connector & Components
    GM1224325Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: It may be necessary to gently rotate the RH temperature door to align the actuator support bracket and actuators.
  8. Install the actuator support bracket and actuators to the HVAC module.
  9. Install the actuator support bracket retaining screws.

    Tighten:  Tighten the screws to 1.6 N.m (14 lb in).

  10. Connect the RH air temperature actuator electrical connector.
  11. Connect the mode actuator electrical connector.
  12. Install the LH actuator.
  13. Install the LH actuator retaining screws.
  14. Connect the LH air temperature actuator electrical connector.
    Fig 6: Identifying LH Air Temperature Actuator & Components
    GM1224374Courtesy of GENERAL MOTORS CORP.
  15. Install the HVAC module. Refer to HVAC Module Assembly Replacement .
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