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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1666 (Heating, Ventilation And Air Conditioning) >> Repair Instruction >> Defroster Door Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the instrument panel trim pad. Refer to TRIM PAD REPLACEMENT -- INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
  2. Remove the passenger side SIR inflator module. Refer to AIR BAG MODULES
  3. Remove the brake pedal. Refer to BRAKE PEDAL ASSEMBLY in Disc & Drum.
  4. Disconnect any ground wires, as necessary.
  5. Remove the nuts and bolts from the steering column support bracket.
  6. Remove the steering column support bracket from the cross vehicle beam.
  7. Remove the screws from the right and left side air distribution ducts.
    Fig 1: Removing Screws From Right & Left Side Air Distribution Ducts
    G01568762Courtesy of GENERAL MOTORS CORP.
  8. Remove the air distribution ducts.
  9. Remove the bolts from the relay bracket and position the relay bracket aside.
    Fig 2: Removing Bolts From Relay Bracket
    G01568763Courtesy of GENERAL MOTORS CORP.
  10. Remove the bolts from the BCM bracket and position the BCM bracket aside.
    Fig 3: Removing Bolts From BCM Bracket
    G01568764Courtesy of GENERAL MOTORS CORP.
  11. Release the wiring harness retaining clips from the cross vehicle beam and position the wiring harness aside.
  12. Remove the two screws below the fuse block that hold the main harness connector to the cross vehicle beam.
  13. Remove the bolts from the center support bracket of the HVAC module.
    Fig 4: Removing Center Support Bracket & Mounting Bolts Of HVAC Module
    G01568765Courtesy of GENERAL MOTORS CORP.
  14. Remove the center support bracket of the HVAC module.
  15. Remove the bolts from the upper support brackets of the HVAC module.
    Fig 5: Removing Bolts From Upper Support Brackets Of HVAC Module
    G01568766Courtesy of GENERAL MOTORS CORP.
  16. Remove the bolts which secure the left cross vehicle beam to the hinge pillar.
    Fig 6: View Of Bolts Which Secure Left Cross Vehicle Beam To Hinge Pillar
    G01568767Courtesy of GENERAL MOTORS CORP.
  17. Remove the bolts which secure the right cross vehicle beam to the hinge pillar.
    Fig 7: Locating Bolts Which Secure Right Cross Vehicle Beam To Hinge Pillar
    G01568768Courtesy of GENERAL MOTORS CORP.
  18. Remove the bolt (1) from the cross vehicle beam.
    Fig 8: Removing Bolt From Cross Vehicle Beam From Vehicle
    G01568769Courtesy of GENERAL MOTORS CORP.
  19. Remove the cross vehicle beam from the vehicle.
  20. Disconnect the 2 vacuum lines from the defroster actuator (3).
    Fig 9: Disconnecting Vacuum Lines From Defroster Actuator
    G01568770Courtesy of GENERAL MOTORS CORP.
  21. Disconnect the orange vacuum line from the recirculation actuator and install a hand vacuum pump (2).
  22. Remove the defroster actuator from the attachment to the HVAC module case.
  23. Using the hand vacuum pump (2) open the recirculation actuator door.
  24. Rotate the defroster actuator to the right and up into the opening between the back of the dash and the opening into the HVAC module. The opening which results when the recirculation actuator door is in the full open position.
  25. Disconnect the defroster actuator from the defroster door arm.
  26. Remove the retaining screws (1) from the air distribution case cover.
    Fig 10: Removing Air Distribution Case Cover & Retaining Screws
    G01568771Courtesy of GENERAL MOTORS CORP.
  27. Remove the air distribution case cover (2).
  28. Remove and discard the air distribution case seal.
  29. Remove the linkage between the defroster door and the vent door on the left side of the HVAC module assembly.
  30. Remove the defroster door (1).
    Fig 11: View Of Defroster Door
    G01568772Courtesy of GENERAL MOTORS CORP.
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