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Low Coolant Light

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I have a '99 Sierra with the 4.3 in it. My low coolant light comes on about once a month. The coolant level never drops, I am not blowing white smoke out of the exaust, there are no leaks in the cooling system and the oil is not a milky white it is clean. The only thing that I can think that is wrong is I might have a bad sensor. Has anyone else had this problem before????
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· I'll Take teh Case!
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I would think it is a bad sensor too...we had a similar problem with our '98 Trans Am. Low coolant light came on one day and stayed on until we replaced the sensor. Sensor was very $$$$, but we saved labor by installing it ourselves...simple job on the ls1...not sure about the 4.3 :think:
 
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