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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1319 (Heating, Ventilation & Air Conditioning) >> Repair Instructions >> HVAC Module Assembly Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install new seals (1,2,3) to the outer HVAC control module.
  2. Install the HVAC control module to the vehicle.
    Fig 1: Outer HVAC Control Module Seals
    G01672683Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE .
  3. Install the nuts which secure the HVAC control module to the dash.

    Tighten 

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

    Fig 2: HVAC Control Module Securing Nuts
    G01672684Courtesy of GENERAL MOTORS CORP.
  4. Install the evaporator drain elbow.
  5. Connect the vacuum hoses to the HVAC module assembly.
  6. Connect the electrical connectors to the HVAC module assembly.
    Fig 3: Evaporator Drain Elbow
    G01672685Courtesy of GENERAL MOTORS CORP.
  7. Install the heater core outlet cover.
  8. Install the cover screws to the heater core outlet.

    Tighten 

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

    Fig 4: Heater Core Outlet Cover
    G01672686Courtesy of GENERAL MOTORS CORP.
  9. Install the cross vehicle beam to the vehicle.
    Fig 5: Cross Vehicle Beam
    G01672687Courtesy of GENERAL MOTORS CORP.

    Important:  Do NOT tighten the bolts at this time.

  10. Install the bolts which secure the right cross vehicle beam to the hinge pillar.
    Fig 6: Right Cross Vehicle Beam Hinge Pillar Bolts
    G01672688Courtesy of GENERAL MOTORS CORP.
  11. Install the bolts which secure the left cross vehicle beam to the hinge pillar.

    Tighten 

    Tighten the bolts to 20 (15 lb ft).

    Fig 7: Left Cross Vehicle Beam Hinge Pillar Bolts
    G01672689Courtesy of GENERAL MOTORS CORP.
  12. Install the bolt (1) to the cross vehicle beam.

    Tighten 

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

    Fig 8: Cross Vehicle Beam Bolt
    G01672690Courtesy of GENERAL MOTORS CORP.
  13. Install the bolts to the upper support brackets of the HVAC module.

    Tighten 

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

    Fig 9: Upper Support Brackets & Retaining Bolts
    G01672691Courtesy of GENERAL MOTORS CORP.
  14. Install the HVAC module center support bracket.
  15. Install the bolts to the center support bracket of the HVAC module.

    Tighten 

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

  16. Install the instrument panel wiring harness on to the cross vehicle beam and secure the retaining clips.
    Fig 10: Center Support Bracket & Bolts
    G01672692Courtesy of GENERAL MOTORS CORP.
  17. Install the BCM bracket and bolts.

    Tighten 

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

    Fig 11: BCM Bracket & Bolts
    G01672693Courtesy of GENERAL MOTORS CORP.
  18. Install the fuse block to the holder.
  19. Install the two screws below the fuse block that hold the main wiring harness connector to the cross vehicle beam.
    Fig 12: Fuse Block
    G01672694Courtesy of GENERAL MOTORS CORP.
  20. Install the support bracket and bolts for the steering column.

    Tighten 

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

  21. Install the brake pedal. Refer to BRAKE PEDAL ASSEMBLY .
  22. Install the passenger side SIR inflator module. Refer to REMOVAL & INSTALLATION (PASSENGER-SIDE) .
    Fig 13: Steering Column Support Bracket & Bolts
    G01672695Courtesy of GENERAL MOTORS CORP.
  23. Install the right and left side air distribution duct
  24. Install the screws to the right and left side air distribution duct.

    Tighten 

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

  25. Install the IP trim pad. Refer to TRIM PAD REPLACEMENT -- IP .
    Fig 14: Right & Left Side Air Distribution Ducts & Screws
    G01672696Courtesy of GENERAL MOTORS CORP.
  26. Connect the heater inlet and outlet hoses to the heater core (3.1 L).

    Important:  Reposition the heater core hose clamps in the indicated location.

  27. Use J 38185  in order to reposition the heater hose inlet and outlet clamps (3.1 L).
    Fig 15: Heater Core Hose Clamp Location (3.1L)
    G01672697Courtesy of GENERAL MOTORS CORP.
  28. Connect the heater inlet and outlet hoses to the heater core (3.8L).

    Important:  Reposition the heater core hose clamps in the indicated location.

  29. Use J 38185  in order to reposition the heater hose inlet and outlet clamps (3.8L).
  30. Install the fuel injector sight shield (3.8L only). Refer to FUEL INJECTOR SIGHT SHIELD REPLACEMENT (L36) or FUEL INJECTOR SIGHT SHIELD REPLACEMENT (L67) .
  31. Fill the cooling system. Refer to Refer to DRAINING AND FILLING COOLING SYSTEM .
    Fig 16: Heater Core Hose Clamp Location (3.8L)
    G01672698Courtesy of GENERAL MOTORS CORP.
  32. Install new O-rings seals on the accumulator tube. Refer to O-Ring Replacement .
  33. Connect the evaporator tube to the evaporator.
  34. Connect the accumulator tube to the evaporator.
  35. Install the accumulator tube to evaporator core block fitting bolt.

    Tighten 

    Tighten the screws to 16 N.m (12 lb ft).

  36. Install the air cleaner assembly. Refer to AIR CLEANER ASSEMBLY .
  37. Connect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
    Fig 17: Evaporator Core Block Fitting Bolt
    G01672699Courtesy of GENERAL MOTORS CORP.
  38. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  39. Leak test the fittings of the component using J 39400-A  .
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