GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Safari - 2WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Auxiliary Air Conditioning Evaporator Replacement

Removal Procedure
  1. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls.
  2. Discharge and recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging
  3. Remove the left body side rear trim panel. Refer to Trim Panel Replacement - Left Body Side in Interior Trim.

    4. Object Number: 280469 Size: SH
  4. Remove the air outlet duct assembly. Refer to Auxiliary Air Outlet Duct Replacement
  5. Remove the electrical connectors.
  6. Raise the vehicle.

    7. Object Number: 280464 Size: SH
  7. Remove the retaining nut in order to remove the auxiliary evaporator rear tube assembly from the core.
  8. Lower the vehicle.
  9. Remove the bolts that retain the case to the vehicle.

    10. Object Number: 280466 Size: SH
  10. Remove the auxiliary evaporator module assembly from the vehicle.
  11. Remove the screws from the case.
  12. Split the case open.
  13. Remove the evaporator core seal.
  14. Remove the core from the case.
  15. Inspect the gaskets and the seals for damage.
  16. Replace the gaskets and the seals if you find damage.

Installation Procedure

    Object Number: 280466 Size: SH
  1. Install the evaporator core into the case.
  2. Install the evaporator core seal.
  3. Reassemble the case halves.
  4. Install the auxiliary evaporator module assembly to the vehicle.

    5. Object Number: 280464 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.

  5. Install the bolts that retain the case to the vehicle.

    6. Tighten
    Tighten the bolts that retain the case to the vehicle to 10 N·m (86 lb in).

  6. Raise the vehicle.
  7. Install the auxiliary evaporator underbody rear tube assembly to the core with the retaining nut.

    8. Tighten
    Tighten the auxiliary evaporator underbody rear tube assembly to the core with the retaining nut to 10 N·m (86 lb in).

  8. Lower the vehicle.

    9. Object Number: 280469 Size: SH
  9. Install the electrical connectors.
  10. Install the air outlet duct assembly. Refer to Auxiliary Air Outlet Duct Replacement
  11. Install the left body side rear trim panel.

    12. Refer to Trim Panel Replacement - Left Body Side in Interior Trim.

  12. Evacuate and charge the system. Refer to Refrigerant Recovery and Recharging
  13. Ensure that no leaks exist in the system.
  14. Install the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls.