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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> HVAC Module Assembly Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Removing/Installing HVAC Module Assembly Seals
    GM1263072Courtesy of GENERAL MOTORS CORP.
  1. Install new seals (1, 2, 3) to the outer HVAC module assembly.
  2. Install the HVAC module assembly to the vehicle.
    3. Fig 2: View Of HVAC Module Assembly
    GM507700Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  3. Install the nuts which secure the HVAC module assembly to the dash.

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

    4. Fig 3: Removin/Installing Evaporator Drain Elbow
    GM1284759Courtesy of GENERAL MOTORS CORP.
  4. Install the evaporator drain elbow.
  5. Connect the electrical connectors to the HVAC module assembly.
  6. Install the I/P carrier to the vehicle. Align the I/P carrier to the HVAC module assembly and the hinge pillars.
  7. Install the bolts to the right and the left I/P carrier.

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

    8. Fig 4: Removing/Installing HVAC Module Assembly Upper Support Bolts
    GM1197447Courtesy of GENERAL MOTORS CORP.
  8. Install the bolts to the HVAC module assembly upper support bracket.

    Tighten:  Tighten the bolts to 4 N.m (36 lb in).

    9. Fig 5: Removing/Installing HVAC Module Assembly Lower Support Bolts
    GM1273425Courtesy of GENERAL MOTORS CORP.
  9. Install the bolts to the HVAC module assembly lower support bracket (1).

    Tighten:  Tighten the bolts to 4 N.m (36 lb in).

  10. Install the bolt to the HVAC module assembly right support bracket (2).

    Tighten:  Tighten the bolt to 4 N.m (36 lb in).

  11. Position the I/P wiring harness to the original position.
  12. Connect any disconnected ground wires.
  13. Install the brake pedal brace bolts to the I/P carrier.
  14. Position the brake pedal to the brake pedal brace.
  15. Install the brake pedal bolt and nut. Refer to Brake Pedal Assembly Replacement .
  16. Seat the bottom junction block tabs and snap the top of the junction block to the passenger knee bolster.
  17. Install the junction block bolt.

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

  18. Install the I/P trim pad. Refer to Trim Pad Replacement - Instrument Panel (I/P) .
    19. Fig 6: View Of Heater Hose To Heater Core
    GM1204093Courtesy of GENERAL MOTORS CORP.
  19. Connect the inlet heater hose to the heater core.
  20. Connect the outlet heater hose to the heater core.
  21. Use J 38185  in order to reposition the inlet heater hose clamp to the heater core.
  22. Use J 38185  in order to reposition the outlet heater hose clamp to the heater core.
  23. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement for the 3.8L engine.
  24. Fill the cooling system. Refer to Draining and Filling Cooling System (L26 Static Fill) , Draining and Filling Cooling System (LY7 Static Fill) or Draining and Filling Cooling System (L26, LY7, GE 47716 Fill) .
  25. Install new sealing washers on the evaporator tube. Refer to Sealing Washer Replacement .
    26. Fig 7: Removing/Installing Evaporator Tube To Thermostatic Expansion Valve (TXV) Nut
    GM1661359Courtesy of GENERAL MOTORS CORP.
  26. Connect the evaporator tube to the TXV.
  27. Install the evaporator tube to the TXV block fitting nut (1).

    Tighten:  Tighten the nut to 17 N.m (12.5 lb ft).

  28. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement for the 3.8L engine or Air Cleaner Assembly Replacement for the 3.6L (LY7) engine.
  29. Connect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (L26) or Battery Negative Cable Disconnect/Connect Procedure (LY7) .
  30. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  31. Leak test the fittings of the component using J 39400-A  . See Special Tools .
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