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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1482 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> HVAC Module Replacement - Auxiliary >> Removal Procedure

Removal Procedure

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  1. Recover the refrigerant. Refer to REFRIGERANT RECOVERY AND RECHARGING .
  2. Drain the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 6) or DRAINING AND FILLING COOLING SYSTEM (BODY VIN CODE 3) in Engine Cooling.
  3. Raise and support the vehicle. Refer to JACKING AND LIFTING in General Information.
  4. Remove the nuts (3) from rear A/C line block fittings.
    IMPORTANT: Cap or tape the open A/C refrigerant lines immediately.
  5. Remove the A/C line block fittings and discard the O-ring seals.
    Fig 1: Removing Nuts From Rear A/C Line Block Fittings
    G01596674Courtesy of GENERAL MOTORS CORP.
  6. Remove the nuts from the heater hoses block fittings.
  7. Remove the heater hoses block fittings from the HVAC module-auxiliary.
  8. Remove the nuts from the HVAC module studs.
  9. Lower the vehicle.
  10. Remove the right side rear quarter trim. Refer to INTERIOR TRIM or INTERIOR TRIM in Interior Trim.
    Fig 2: Removing Heater Hoses Block Fittings From HVAC Module-Auxiliary
    G01596675Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the electrical connectors from the HVAC module.
  12. Disconnect the rear compartment air outlet ducts (5) from the HVAC module (3).
    Fig 3: Disconnecting Rear Compartment Air Outlet Ducts From HVAC Module
    G01596676Courtesy of GENERAL MOTORS CORP.
  13. Remove the mounting bolts (5) from the HVAC module.
  14. Remove the HVAC module (1).
  15. Remove and discard the HVAC module pass through seal.
    Fig 4: Removing HVAC Module
    G01596677Courtesy of GENERAL MOTORS CORP.
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