GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Envoy - 2WD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Auxiliary HVAC Module Case Replacement

Removal Procedure

    Object Number: 819795 Size: SH
  1. Remove the HVAC module-auxiliary. Refer to Auxiliary HVAC Module Replacement .
  2. Remove the screws from the blower motor-auxiliary.
  3. Remove the blower motor-auxiliary.
  4. Disconnect the electrical connectors.
  5. Remove the evaporator core-auxiliary. Refer to Auxiliary Air Conditioning Evaporator Replacement .
  6. Remove the screws from the air temperature actuator-auxiliary.
  7. Remove the air temperature actuator-auxiliary.
  8. Disconnect the electrical connector.
  9. Remove the screws from the mode actuator-auxiliary.
  10. Remove the mode actuator-auxiliary.
  11. Disconnect the electrical connector.
  12. Remove all of the screws from the HVAC module-auxiliary.
  13. Separate the HVAC module-auxiliary case halves (2,13).
  14. Remove the mode door (15) from the HVAC module-auxiliary case half (2).
  15. Remove the air temperature door (14) from the HVAC module-auxiliary case half (2).

Installation Procedure

    Object Number: 819795 Size: SH
  1. Transfer the air temperature door (14) to the HVAC module-auxiliary case half (2).
  2. Transfer the mode door (15) to the HVAC module-auxiliary case half (2).
  3. Assemble the HVAC module-auxiliary case halves (2,13).

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install all of the screws to the HVAC module-auxiliary.

    5. Tighten
    Tighten the screws to 2 N·m (18 lb in).

  5. Install the mode actuator-auxiliary.
  6. Install the mode actuator-auxiliary screws.

    7. Tighten
    Tighten the screws to 2 N·m (18 lb in).

  7. Install the air temperature actuator-auxiliary.
  8. Install the air temperature actuator-auxiliary screws.

    9. Tighten
    Tighten the screws to 2 N·m (18 lb in).

  9. Install the evaporator core-auxiliary. Refer to Auxiliary Air Conditioning Evaporator Replacement .
  10. Install the blower motor-auxiliary.
  11. Install the blower motor-auxiliary screws.

    12. Tighten
    Tighten the screws to 2 N·m (18 lb in).

  12. Install the HVAC module-auxiliary. Refer to Auxiliary HVAC Module Replacement .