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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 >> Removal Procedure

Removal 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.
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (L26) or Battery Negative Cable Disconnect/Connect Procedure (LY7) .
  3. Remove 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.
  4. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement for the 3.8L engine.
  5. Drain the cooling system. Refer to Draining and Filling Cooling System (L26 Static Fill) or Draining and Filling Cooling System (LY7 Static Fill) or Draining and Filling Cooling System (L26, LY7, GE 47716 Fill) .
  6. Remove the instrument panel (I/P) trim pad. Refer to Trim Pad Replacement - Instrument Panel (I/P) .
  7. Remove the bolt from the accessory wiring junction block.
  8. Disengage the junction block tabs from the passenger knee bolster. Remove the junction block from the knee bolster.
  9. Remove the brake pedal nut and bolt.
  10. Remove the brake pedal brace bolts from the I/P carrier cross car beam.
  11. Disconnect any ground wires, as necessary.
  12. Reposition the I/P wiring harness out of the way.
    13. Fig 1: Removing/Installing HVAC Module Assembly Lower Support Bolts
    GM1273425Courtesy of GENERAL MOTORS CORP.
  13. Remove the bracket bolt from the HVAC module assembly right support (2).
  14. Remove the bracket bolts from the HVAC module assembly lower support (1).
    15. Fig 2: Removin/Installing HVAC Module Assembly Upper Support Bolts
    GM1197447Courtesy of GENERAL MOTORS CORP.
  15. Remove the bracket bolts from the HVAC module assembly upper support.
  16. Remove the right and the left I/P carrier bolts.
  17. Remove the I/P carrier.
    18. Fig 3: Removing/Installing Evaporator Tube To Thermostatic Expansion Valve (TXV) Nut
    GM1661359Courtesy of GENERAL MOTORS CORP.
  18. Remove the nut (1) that secures the evaporator tube to the thermostatic expansion valve (TXV).
  19. Disconnect the evaporator tube from the TXV.
  20. Remove the seal washers and discard.
    21. Fig 4: View Of Heater Hose To Heater Core
    GM1204093Courtesy of GENERAL MOTORS CORP.
  21. Use J 38185  in order to position aside the inlet heater hose clamp at the heater core.
  22. Use J 38185  in order to position aside the outlet heater hose clamp at the heater core.
  23. Disconnect the inlet heater hose from the heater core.
  24. Disconnect the outlet heater hose from the heater core.
  25. Disconnect the electrical connectors from the HVAC module assembly.
    26. Fig 5: Removing/Installing Evaporator Drain Elbow
    GM1284759Courtesy of GENERAL MOTORS CORP.
  26. Remove the evaporator drain elbow.
    27. Fig 6: View Of HVAC Module Assembly
    GM507700Courtesy of GENERAL MOTORS CORP.
  27. Remove the nuts which secure the HVAC module assembly to the dash.
  28. Remove the HVAC module assembly.
    29. Fig 7: Removing/Installing HVAC Module Assembly Seals
    GM1263072Courtesy of GENERAL MOTORS CORP.
  29. Remove all of the seals (1, 2, 3) from the outer HVAC module assembly.
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