Heater Core Replacement Procedures

1998 Cadillac DeVille
____________

 

NOTE:  For your convenience, the heater cores and other heater system parts listed on this page and on the replacement parts store linked from this page fit your vehicle. In most cases the parts listed will be the lowest prices available for that specific part. You may not have to pay sales tax or shipping on many of the items, making the purchase price even lower when compared with buying the part at your local auto parts store. We receive a small commission on each purchase through this site, which helps pay the costs of operating the site. This allows us to provide this service at no cost to the users. Therefore, please remember that since you need the parts and you must buy them someplace, you can save money while helping to keep this site free for future use by simply ordering your heater core and other needed parts through one of the links on this page. 

Heater Cores for 1998 Cadillac DeVille

Other Heater System Replacement Parts for 1998 Cadillac DeVille

 

Procedure Source: JustAnswer.com

NOTE: This procedure is for vehicles with  "Automatic A/C system". If yoursystem is not automatic, refer to the procedure source for more information. 

HEATER CORE 
Removal  
 
1. Disconnect negative battery cable.
2. Partially drain coolant.
3. Remove glove box. (See GLOVE BOX)
4. Remove right lower sound insulator.
5. Disconnect electrical connectors.
6. Remove ACM.  (See A/C-HEATER PROGRAMMER and  See Fig. 7.) 

7. Remove heater core cover.
8. Remove inlet and outlet hoses from heater core.
9. Remove 2 heater core retaining screws.
10. Remove heater core.
Installation

1. Reverse removal procedure.
2. Fill cooling system.
3. Perform air mix valve adjustment. (See TEMPERATURE AIR MIX VALVE under ADJUSTMENTS. )

GLOVE BOX 
Removal & Installation 
 
1. Disable air bag system. See DISABLING AIR BAG SYSTEM 

2. Open trap door in rear of glove box.
3. Disconnect passenger-side air bag module wiring connector from retaining clip on rear of glove box.
4. Remove glove box light lens by gently prying release tabs.
5. Gently pry top of switch cover to release tab. 

6. Reaching through light opening, push switch outboard. Disconnect electrical connector, and remove switch.
7. Remove 6 glove box-to-instrument panel screws.
8. Remove glove box.
9. To install, reverse removal procedure 
DISABLING AIR BAG SYSTEM 
 
***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 the SIR fuse is removed and ignition switch is in the RUN position, the 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.
2. Turn ignition switch OFF and remove key. 

3. Remove SIR fuse (20-amp) from trunk fuse block, located behind carpet in left front corner of trunk.
4. Remove left sound insulator panel.
5. Remove Connector Position Assurance (CPA) clip and disconnect driver-side Yellow 2-pin connector near base of steering column.
 
6. Remove glove box.
7. Remove CPA clip and disconnect passenger-side Yellow 2-pin connector. 
A/C-HEATER PROGRAMMER 
Removal & Installation 

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

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

3. To reassemble, reverse these procedures.

Comments:

You must be logged in to leave a reply. Login »