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Low coolant light and no heat related?

01-27-2005, 02:36 PM
Our 1998 "low coolant" light has been coming off and on for a few months (even though there has always been plenty of coolant in the radiator and the reservoir). In the last week the heat has only been "hot" while controls are in the heat position only intermittently.

There is plenty of air flow. I haven't had a chance to check the temp. of the hoses to the heater core to see if they are hot, my guess is they are because when the heat does come on it comes on instantly and it is very warm.

The thermostat is operating properly as the temp. guage rises steadily and maintains 180 +/- operating temp.

I believe the Air Mix Door Actuator may be the problem, but I wonder if the "low coolant" light may have something to do with this problem.

Doe anyone know if the "low coolant" light and the Air Mix door (possible) problem could be releated?


01-28-2005, 03:02 PM
has your intake gaskets been changed?

you have air in the cooling system.

01-28-2005, 03:07 PM
Intake gasket was changed at 35k (just under warranty!!!).

I've read about the air in the coolant issue, which sounds like it may give intermittent problems.

I'm taking it to a GM mechanic this weekend .... we will see.

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