GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Savana 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 HVAC Module Assembly Replacement

Removal Procedure
  1. Remove the battery from the vehicle. Refer to Battery Replacement in Engine Electrical.
  2. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  3. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  4. Remove the coolant recovery reservoir or surge tank. Refer to Coolant Recovery Reservoir Replacement or Surge Tank (Diesel) Replacement in Engine Cooling.
  5. Remove the electrical connectors.
  6. Remove the accumulator. Refer to Air Conditioning Accumulator Replacement .
  7. Remove the evaporator tube from the evaporator. Refer to Evaporator Tube Replacement .
  8. Remove the insulator cover.
  9. Remove the evaporator front cover.
  10. Separate the case halves.

    11. Object Number: 300824 Size: SH
  11. Remove the nuts (2) retaining the evaporator case.
  12. Remove the evaporator case from the vehicle.

Installation Procedure

    Object Number: 300824 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.

  1. Install the evaporator case to the vehicle.
  2. Install the nuts (2) retaining the evaporator case.

    3. Tighten
    Tighten the evaporator case retaining nuts to 6 N·m (53 lb in).

  3. Install the evaporator front cover.
  4. Install the insulator cover.
  5. Install the evaporator tube to the evaporator. Refer to Evaporator Tube Replacement .
  6. Install the accumulator. Refer to Air Conditioning Accumulator Replacement .
  7. Install the electrical connectors.
  8. Install the coolant recovery reservoir or surge tank. Refer to Coolant Recovery Reservoir Replacement or Surge Tank (Diesel) Replacement in Engine Cooling.
  9. Fill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
  10. Recharge the refrigerant, if equipped. Refer to Refrigerant Recovery and Recharging .
  11. Install the battery to the vehicle. Refer to Battery Replacement in Engine Electrical.