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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 >> Installation Procedure

Installation 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.

Important:  Align the defroster door assist spring to the HVAC module case.

  1. Install the defroster door (1).
  2. Install the linkage between the defroster door and the vent door on the left side of the HVAC module.
    Fig 1: Installing Defroster Door
    G01482164Courtesy of GENERAL MOTORS CORP.
  3. Install the air distribution case cover (2).
    NOTE: Refer to FASTENER NOTICE .
  4. Install the retaining screws (1) to the air distributor cover.

    Tighten 

    Tighten the screws to 1.5 N.m (13 lb in).

    Fig 2: Installing Air Distribution Case Cover & Retaining Screws
    G01482165Courtesy of GENERAL MOTORS CORP.
  5. Connect the orange vacuum line to a hand vacuum pump (2).
  6. Using the hand vacuum pump (2) open the recirculation actuator door.
  7. 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.
  8. Connect the defroster actuator to the defroster door arm.
  9. Position the defroster actuator on to the mounting slides of the HVAC module assembly.
  10. Ensure that the lock tab locks the defroster actuator in place.
  11. Connect the vacuum lines to the defroster actuator.
  12. Connect the vacuum line to the recirculation actuator.
    Fig 3: Connecting Orange Vacuum Line To Hand Vacuum Pump
    G01482166Courtesy of GENERAL MOTORS CORP.
  13. Install the cross vehicle beam to the vehicle.
    Fig 4: Installing Cross Vehicle Beam
    G01482167Courtesy of GENERAL MOTORS CORP.
  14. Install the bolts which secure the right cross vehicle beam to the hinge pillar.

    Important:  Do NOT tighten the bolts at this time.

    Fig 5: Installing Right Cross Vehicle Beam Bolts
    G01482168Courtesy of GENERAL MOTORS CORP.
  15. Install the bolts which secure the left cross vehicle beam to the hinge pillar.

    Tighten 

    Tighten the bolts to 20 N.m (15 lb ft).

    Fig 6: Installing Left Cross Vehicle Beam Bolts
    G01482169Courtesy of GENERAL MOTORS CORP.
  16. Install the bolt (1) to the cross vehicle beam.

    Tighten 

    Tighten the bolts to 20 N.m (15 lb ft).

    Fig 7: Installing Bolt To Cross Vehicle Beam
    G01482170Courtesy of GENERAL MOTORS CORP.
  17. Install the bolts to the upper support brackets of the HVAC module.

    Tighten 

    Tighten the bolts to 10 N.m (89 lb in).

    Fig 8: Installing Bolts To Upper Support Brackets Of HVAC Module
    G01482171Courtesy of GENERAL MOTORS CORP.
  18. Install the HVAC module center support bracket.
  19. Install the bolts to the center support bracket of the HVAC module.

    Tighten 

    Tighten the bolts to 10 N.m (89 lb in).

  20. Install the instrument panel wiring harness on to the cross vehicle beam and secure the retaining clips.
    Fig 9: Installing HVAC Module Center Support Bracket
    G01482172Courtesy of GENERAL MOTORS CORP.
  21. Install the BCM bracket and bolts.

    Tighten 

    Tighten the bolts to 10 N.m (89 lb in).

    Fig 10: Installing BCM Bracket & Bolts
    G01482173Courtesy of GENERAL MOTORS CORP.
  22. Install the fuse block to the holder.
  23. Install the 2 screws below the fuse block that hold the main wire harness connector to the cross car beam.
    Fig 11: Installing Fuse Block & Screws
    G01482174Courtesy of GENERAL MOTORS CORP.
  24. Install the steering column support bracket to the cross vehicle beam.
  25. Install the steering column support bracket nuts and bolts.

    Tighten 

    Tighten the nuts and bolts to 50 N.m (37 lb ft).

  26. Install the brake pedal. Refer to BRAKE PEDAL ASSEMBLY .
  27. Connect all disconnected ground wires.
  28. Install the right and left side air distribution ducts.
    Fig 12: Installing Steering Column Support Bracket, Nuts & Bolts
    G01482175Courtesy of GENERAL MOTORS CORP.
  29. Install the right and left side air distribution duct bolts.

    Tighten 

    Tighten the bolts to 1.5 N.m (13 lb in).

  30. Install the passenger side SIR inflator module. Refer to REMOVAL & INSTALLATION (PASSENGER-SIDE) .
  31. Install the I/P trim pad. Refer to TRIM PAD REPLACEMENT - INSTRUMENT PANEL (I/P) .
  32. Connect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
Fig 13: Installing Right & Left Side Air Distribution Duct Bolts
G01482176Courtesy of GENERAL MOTORS CORP.
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