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Carhelp4u
Carhelp4u, ASE CERTIFIED TECH
Category: Chevy
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Experience:  ASE CERTIFICATION
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How do you replace a heater core in a 1996 cadillac deville

Customer Question

how do you replace a heater core in a 1996 cadillac deville
Submitted: 8 years ago.
Category: Chevy
Expert:  Carhelp4u replied 8 years ago.

Here is what I have for this procedure. Feel free to contact me with any questions! Good luck!

  • Disconnect the negative battery cable.
  • Partially drain the coolant.
  • Open the IP storage compartment door.
    Object Number: 310652  Size: LH

  • Remove the 4 fasteners (2,7) that retain the IP storage compartment assembly (8) to the instrument panel.
  • Remove the 2 fasteners from inside the instrument panel storage compartment.
  • Partially remove the instrument panel storage compartment assembly (8).
  • Disconnect the electrical connectors.
  • Remove the instrument panel storage compartment.
  • Remove the right sound insulator.
    Object Number: 105525  Size: SH

  • Remove the fasteners to disengage the insulator from the lower IP.
  • Disconnect the electrical connector(s).
  • Remove the insulator panel (3).
  • Remove the heater and A/C programmer. Object Number: 305022  Size: SH

  • Disconnect the vacuum and electrical connectors from the programmer (1).
    Object Number: 305018  Size: SH

  • Remove the programmer (1) from the vehicl
  • Disconnect the driver air mix actuator (2).
  • Disconnect the passenger air mix actuator (3).
    Object Number: 305037  Size: SH

  • Remove the heater core cover.
    Object Number: 378606  Size: SH

  • Remove the inlet and outlet heater hoses from the heater core.
    Object Number: 381380  Size: SH

  • Remove the heater retaining screws.
  • Remove the heater core.
    Object Number: 381380  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  • Install the heater core to the heater case using the 2 screws.

    Tighten
    Tighten the screws to 2 N·m (18 lb in).


    Object Number: 378606  Size: SH

  • Install the inlet and outlet heater hoses to the heater core.
    Object Number: 305037  Size: SH

  • Install the heater core cover and the screws.

    Tighten
    Tighten the screws to 2 N·m (18 lb in).

  • Connect the passenger air mix actuator (3).
  • Connect the driver air mix actuator (2).
  • Install the heater and A/C programmer.
  • Install the instrument panel compartment.
  • Install the right sound insulator. Connect the negative battery cable.
  • Refill the cooling system.