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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1233 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Defroster Door Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
  2. Remove the instrument panel (I/P) trim pad. Refer to TRIM PAD REPLACEMENT - INSTRUMENT PANEL (I/P) .
  3. Remove the passenger side SIR inflator module. Refer to REMOVAL & INSTALLATION (PASSENGER-SIDE) .
  4. Remove the screws from the right and left side air distribution ducts.
  5. Remove the air distribution ducts.
    Fig 1: Removing Air Distribution Ducts & Screws
    G01482153Courtesy of GENERAL MOTORS CORP.
  6. Unclip the fuse block and position aside.
  7. Remove the 2 screws below the fuse block that hold the main wire harness connector to the cross car beam.
  8. Remove the brake pedal. Refer to BRAKE PEDAL ASSEMBLY .
  9. Disconnect any ground wires, as necessary.
  10. Remove the nuts and bolts from the steering column support bracket.
  11. Remove the steering column support bracket from the cross vehicle beam.
    Fig 2: Removing Steering Column Support Bracket, Nuts & Bolts
    G01482154Courtesy of GENERAL MOTORS CORP.
  12. Remove the retaining bolts and position the BCM bracket aside.
  13. Release the wiring harness retaining clips from the cross vehicle beam and position the wiring harness out of the way.
    Fig 3: Removing BCM Bracket & Retaining Bolts
    G01482155Courtesy of GENERAL MOTORS CORP.
  14. Remove the retaining bolts from the center support bracket of the HVAC module.
  15. Remove the center support bracket of the HVAC module.
    Fig 4: Removing Center Support Bracket Of HVAC Module & Retaining Bolts
    G01482156Courtesy of GENERAL MOTORS CORP.
  16. Remove the retaining bolts from the upper support brackets of the HVAC module.
    Fig 5: Removing Upper Support Brackets Of HVAC Module & Retaining Bolts
    G01482157Courtesy of GENERAL MOTORS CORP.
  17. Remove the bolts which secure the left cross vehicle beam to the hinge pillar.
    Fig 6: Removing Left Cross Vehicle Beam Bolts
    G01482158Courtesy of GENERAL MOTORS CORP.
  18. Remove the bolts which secure the right cross vehicle beam to the hinge pillar.
    Fig 7: Removing Right Cross Vehicle Beam Bolts
    G01482159Courtesy of GENERAL MOTORS CORP.
  19. Remove the bolt (1) from the cross vehicle beam.
  20. Remove the cross vehicle beam from the vehicle.
    Fig 8: Removing Bolt From Cross Vehicle Beam
    G01482160Courtesy of GENERAL MOTORS CORP.
  21. Disconnect the 2 vacuum lines from the defroster actuator (3).
  22. Disconnect the orange vacuum line from the recirculation actuator and install a hand vacuum pump (2).
  23. Remove the defroster actuator from its attachment to the HVAC module case.
  24. Using the hand vacuum pump (2) open the recirculation actuator door.
  25. 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.
  26. Disconnect the defroster actuator from the defroster door arm.
    Fig 9: Disconnecting Vacuum Lines From Defroster Actuator
    G01482161Courtesy of GENERAL MOTORS CORP.
  27. Remove the retaining screws (1) from the air distribution case cover.
  28. Remove the air distribution case cover (2).
  29. Remove and discard the air distribution case seal.
  30. Remove the linkage between the defroster door and the vent door on the left side of the HVAC module.
    Fig 10: Removing Air Distribution Case Cover & Retaining Screws
    G01482162Courtesy of GENERAL MOTORS CORP.
  31. Remove the defroster door (1).
Fig 11: Removing Defroster Door
G01482163Courtesy of GENERAL MOTORS CORP.
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