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Q: Check coolant level light on 2000 Cadillac DeVille

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Check coolant level light comes on almost as soon as the car is started. The level has been checked, coolant flush was done and the light still comes on. I was told it was the sensor and the coolant tank needed to be replaced. Is this a common problem??
(3) Answers
i put another tank on. but light still come on.what to do next. i had the tank plug check. but do not have fire going throug it. what next?
The low coolant sensor is in the radiator overflow/surge tank in the bottom. It may very well be the problem. The only way to know is to have someone check the paramaters of the coolant sensor with a scan tool.