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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 >> Heater Core 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. Drain the coolant. 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) in Engine Cooling.
  2. Use J 38185  in order to position aside the heater hose inlet and outlet clamps at the heater core.
  3. Disconnect the inlet and outlet heater hose from the heater core.
  4. Remove the RH instrument panel closeout/insulator panel. Refer to Closeout/Insulator Panel Replacement - Right in Instrument Panel, Gages, and Console.
  5. Remove the LH instrument panel closeout/insulator panel. Refer to Closeout/Insulator Panel Replacement - Left in Instrument Panel, Gages, and Console.
  6. Remove the floor carpet. Refer to Carpet Replacement - Front in Interior Trim.
  7. Remove the communication interface module. Refer to Communication Interface Module Replacement in Cellular Communication.
  8. Remove the rear floor air outlet duct from the holes in the floor reinforcement.
  9. Disconnect the rear floor air outlet duct from the heater core outlet cover.
  10. Remove the rear floor air outlet duct.
    11. Fig 1: Removing/Installing Heater Air Outlet Cover Heat Stakes & Screws
    GM1197427Courtesy of GENERAL MOTORS CORP.
  11. Remove the heater core outlet cover screws (2).
  12. Remove the heater core outlet cover heat stakes (1) with a small chisel.
  13. Remove the heater core outlet cover from the HVAC module assembly.
    14. Fig 2: Removing Heater Core Cover Heat Stakes & Screws
    GM1197437Courtesy of GENERAL MOTORS CORP.
  14. Remove the heater core cover screws (2).
  15. Remove the heater core cover heat stakes (1) with a small chisel.
  16. Remove the heater core cover from the HVAC module assembly.
    17. Fig 3: Removing/Installing Heater Core
    GM1197439Courtesy of GENERAL MOTORS CORP.
  17. Remove the heater core from the HVAC module assembly.
    18. Fig 4: Removing/Installing Heater Core Foam Seal
    GM1197441Courtesy of GENERAL MOTORS CORP.

  18. Remove the heater core foam seal (1) from the HVAC module assembly.

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