Question about 1994 Cadillac DeVille

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I HAVE A 1994 CADILLAC STS AND NEEDING TO REPLACE A HEATER CORE. HOW DO I DO IT MYSELF?

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This can be a very difficult repair. If you pay someone to do it, the labor costs are very high due to the amount of labor necessary to even access the heater core. I cannot tell you step by step how to do this. I can however tell you that you will have to remove enough of the dash to allow access to the core. Go slow, be careful and do not break any of the parts. Use common sense to figure out how the parts come apart. Look for screws and clips. Some plastic parts just snap together. Take digital photos as you go along to help you in reassembly. It is just a matter of getting to the core and removing it. Of course you will need to drain and flush the cooling system, replace the thermostat, and add a fresh 50/50 mix of DexCool & Distilled water after installing the new core. Be sure and set the heat to high when pouring in the fresh coolant. Bleed all air from the system.

Posted on Sep 09, 2009

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I have 1998 cadillac STS and the heater blows cold air only


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