I have a 2000 Grand Prix GTP with approximately 40,000 miles on it. Recently my wife indicated that the Low Coolant was remaining on after start up. Sometimes the light will stay on for 30 secs. or less and at other times it will remain on for several miles. I checked the coolant level in the reservoir and it seemed marginally low at best, certainly not low enough to trigger the light I don't feel. I added a little coolant and also checked the radiator level, it was right up to the neck.
Does anyone have any ideas as to what may be occurring? In February the head gaskets were replaced by the dealer due to a significant oil leak from the rear head gasket. Although I don't see or smell any antifreeze leaking, could this be something related to an intake manifold gasket leak, air in the system, or something possibly related to the previous head gasket work. Again, I am reaching for straws. Any thoughts would be appreciated. The car runs fine otherwise.
Gary