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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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· internet bigot®
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17,125 Posts
if you have constantly checked the coolant level.. and it doesnt drop, next best bet would be sensor... are you checking the coolant when it is cold?... because when it is warm it expands...
 
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