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How to change heater core in a 92 cadillac deville

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The Generic Procedure is :-

This information is assuming you have a "Automatic A/C system" if you do not please let me know.


Removal & Installation

1. Disconnect negative battery cable
. Partially drain coolant. Remove glove box. See GLOVE BOX. Remove right lower sound insulator. Disconnect electrical connectors. Remove ACM. See A/C-HEATER PROGRAMMER. See Fig. 7.

2. Remove heater core cover. Remove inlet and outlet hoses from heater core. Remove 2 heater core retaining screws. Remove heater core. To install, reverse removal procedure. Fill cooling system. Perform air mix valve adjustment. See TEMPERATURE AIR MIX VALVE under ADJUSTMENTS.


Removal & Installation

1. Disable air bag system. See AIR BAG SYSTEM SAFETY article in GENERAL SERVICING. Open trap door in rear of glove box. Disconnect passenger-side air bag module wiring connector from retaining clip on rear of glove box. Remove glove box light lens by gently prying release tabs. Gently pry top of switch cover to release tab.

2. Reaching through light opening, push switch outboard. Disconnect electrical connector, and remove switch. Remove 6 glove box-to-instrument panel screws. Remove glove box. To install, reverse removal procedure


WARNING: SDM maintains sufficient voltage to cause air bag deployment for up to 10 minutes after ignition switch is turned OFF, battery is disconnected, or fuse powering SDM is removed.

In order to begin servicing immediately, air bag modules must be removed from deployment loop. NOTE: When SIR fuse is removed and ignition switch
is in RUN position, AIR BAG warning light will be on. This does not indicate a system malfunction.

Frontal Air Bag System

1. Turn steering wheel to place vehicle wheels in straight-ahead position. Turn ignition switch OFF and remove key.

2. Remove SIR fuse (20-amp) from trunk fuse block, located behind carpet in left front corner of trunk. Remove left sound insulator panel. Remove Connector Position Assurance (CPA) clip and disconnect driver-side Yellow 2-pin connector near base of steering column.

3. Remove glove box. Remove CPA clip and disconnect passenger-side Yellow 2-pin connector.


Removal & Installation

Disconnect negative battery cable. Remove right sound insulator. Remove glove box. See GLOVE BOX. Disconnect programmer electrical and vacuum connectors. Remove A/C-heater programmer. See Fig. 7. To install, reverse removal procedure.

Actuator Calibration

After actuator replacement, actuator must be recalibrated to ensure proper valve travel. Cycle ignition switch to ON position for 3 minutes to allow programmer and actuator(s) to recalibrate travel. For driver or passenger link rod adjustment, see appropriate link rod adjustment procedure.

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Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Apr 29, 2010


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How do i replace a heater core in a 1999 cadillac deville


Here is detailed solution on how to replace the heater core in the 1999 cadillac deville;

STEP 1 Disconnect the negative battery cable.

STEP 2. Drain and recycle the engine coolant.

STEP 3. Disconnect the heater core hoses using tool J-37097 or an equivalent.

STEP 4. Remove the right side sound insulator and the glove box module.

STEP 5 Remove the programmer shield, if equipped, and disconnect the air mix valve link.

STEP 6 Disconnect the programmer vacuum and electrical connectors.

STEP 7 Remove the heater core cover, leaving the programmer attached.

STEP 8 Remove the heater core retaining screws and the heater core.

have a nice day..

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