Low coolant light on for a few minutes when first starting up in the cold mornings.checked radiator fine,checked resivor fine added coolant to resivor.not losing coolant no leaks.could the sensor be going bad? can i clean the sensor and were is the sensor located.2002 montecarlo ss 3.8 v6. dominic

 

I have a 2000 SS 3.8 with the same issue. My Chev mechanic cousin said the intake plenumwas the issue. They get soft and leak internally with the coolant seaping into the egr and reburning. It will have a tendancy to shudder a bitat start up and when you come to a stop. Does that fir the problem? Dealer plenums are around $100 with aftermarkets for $55-$60. Good Luck.

 

coolant light on again the hose from the rad to the resivor had no coolant in it.added coolant light is out .if i am losing coolant were would the coolant go.oil is clean.marked coolant level seems to stay at that line or above.what can i do to see if i have a coolant leak .were would the coolant go ? dominic any advice would be great