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My 1992 Deville had the heater core go. If your always low on coolant, than this may be your prolem. It's behind the glove box. You unsrew the glove box, slide it out, unplug the lights from it. There is a black cover at the bottom you unscrew as well. You will see a black box with the fan adjustor on it. It has a little arm connected to a small motor. The arm shouldn't be loose. Turn your key on, change your temperature from hot to cold, you should see the arm move. If no, make sure its not stuck, check your fuses. If it does move.. continue readin. lol Under that there is a box, make of peices. I think its only like 4 screws and it's open. Right front side of the engine where the maxifuse centre on the left veiwing from the front you'll see two coolant lines. They are tricky to get out. Pop the rubber tubes off. Go back inside and pull the heater core out. Switch it the opposite way for the new one. I used c-clamps putting the new one in because they are so much easier to work with, especially with the room provided. You can use a used one from a bigger GM car around that year. Might last a week to 4 years. Or just buy new, but costs.

AnswerMy 1992 Deville had the heater core go. If your always low on coolant, than this may be your prolem. It's behind the glove box. You unsrew the glove box, slide it out, unplug the lights from it. There is a black cover at the bottom you unscrew as well. You will see a black box with the fan adjustor on it. It has a little arm connected to a small motor. The arm shouldn't be loose. Turn your key on, change your temperature from hot to cold, you should see the arm move. If not, make sure its not stuck, check your fuses. If it does move.. continue readin. lol Under that there is a box, made of 2 peices. I think its only like 4 screws and it's open. Right front side of the engine where the maxifuse centre on the left veiwing from the front you'll see two coolant lines. They are tricky to get out. Pop the rubber tubes off. Go back inside and pull the heater core out. Switch it the opposite way for the new one. I used c-clamps putting the new one in because they are so much easier to work with, especially with the room provided. You can use a used one from a bigger GM car around that year. Might last a week to 4 years. Or just buy new, but costs.
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โˆ™ 2011-09-13 21:21:32
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Q: What are the steps in fixing the heating system on a 1992 Cadillac Sedan DeVille?
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