GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 DeVille 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 HVAC Module Assembly Replacement

Tools Required

J 39400 Halogen Leak Detector A/C

Removal Procedure
  1. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging .

    2. Object Number: 755984 Size: SH
  2. Remove the evaporator nut (2).
  3. Disconnect the evaporator hose assembly from the evaporator.
  4. Disconnect the heater hoses from the heater core. Refer to Heater Hoses Replacement .

    5. Object Number: 130710 Size: SH
  5. Remove the evaporator drain.
  6. Remove the dash integration module. Refer to Dash Integration Module Replacement in Body Control System.
  7. Remove the instrument panel assembly. Refer to Instrument Panel Assembly Replacement in Instrument Panel, Gages and Console.
  8. Remove the defroster duct screws (2).

    9. Object Number: 474767 Size: SH
  9. Remove the defroster duct (1).
  10. Disconnect the electrical connections to the HVAC module.

    11. Object Number: 493716 Size: SH
  11. Remove the HVAC module retaining nuts.

    12. Object Number: 130657 Size: SH
  12. Remove the HVAC module assembly.

Installation Procedure

    Object Number: 130657 Size: SH
  1. Install the HVAC module assembly.

    2. Object Number: 493716 Size: SH

    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.

  2. Install the HVAC module retaining nuts.

    3. Tighten
    Tighten the HVAC module retaining nuts to 9 N·m (80 lb in).

  3. Install the dash integration module. Refer to Dash Integration Module Replacement in Body Control System.
  4. Reconnect the electrical connectors.

    5. Object Number: 474767 Size: SH
  5. Install the defroster nozzle (1).
  6. Install the defroster duct screws (2).

    7. Object Number: 130710 Size: SH
  7. Install the evaporator drain.
  8. Install the instrument panel assembly. Refer to Instrument Panel Assembly Replacement in Instrument Panel, Gages and Console.
  9. Install the heater hoses to the heater core. Refer to Heater Hoses Replacement .
  10. Connect the evaporator hose assembly to the evaporator core.
  11. Install the evaporator nut to the evaporator.

    12. Tighten
    Tighten the evaporator hose nut to 24 N·m (18 lb ft).

  12. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  13. Leak test the fittings of the repaired or reinstalled component using J 39400 .