There is a low level sensor in the side of the radiator. They do go bad.
the coolant level sensor is probably stuck it is on the bottom of coolant resivior most times all it takes is a tap with the handle end of the screwdriver on the side of the res where sensor is
It would be to your advantage to buy a Haynes Manual as there is plenty of information that would be very helpful.
It would be best for you to go a parts house or bookstore and purchase a Haynes manual. It will give you plenty of information that will be useful.
It is one of two things: Level of coolant in radiator/overflow or the level of windshield wiper fluid. ---------- Low coolant. Check your coolant level as soon as possible. ~Pengauin
The extra coolant will simply be pushed into the reservoir once the coolant heats up enough. It is also possible that (especially if there is already some fluid in the reservoir) that it will be pushed out of the reservoir unto the ground. Radiator fluid (antifreeze) is toxic to animals (it tastes sweet and so animals may be attracted to it). Please clean up or spray down with plenty of water any coolant that leaks or pours on the ground.
I'd start with the thermostat. Make certain that you have plenty of coolant and that the radiator isn't blocked. After you've checked all that... we'll talk.
Fan not working Water pump not Working well enough Stuck Thermostat. Air Bubble in system Head gasket failure Radiator plugged or coated inside Radiator dirty or plugged stopping airflow
You may have a bad temperature sending unit. If that switch is defective, you will get a faulty reading. Also check the radiator to see if the coolant is flowing and there is no blockage in the radiator itself. Also check the belt for tightness.
In the radiator there is a sensor about 1/3rd of the way down from the top with 1 wire connected to it. When the sensor goes bad the low coolant light stays on. On our GM products replacing the sensor in the radiator turns the light off. The wire from the sensor to the dash light could have a bare spot in it and be touching metal witch would turn it on but I have never seen that yet. It would pay to check this also.
Make sure the engine is completely cool. Disconnect the hose at the water pump. Allow as much coolant as possible to drain out into a sealable container for proper disposal. Remove the hose from the radiator. If the hose is being stubborn in removal, carefully slit the hose around the fittings and peel it off. Replace with new hose and new clamps. Refill radiator with coolant. Allow engine to run for a couple of minutes to make sure there is plenty of coolant in the system. Add more if needed.
Plugged heater core maybe. Maybe the thermostat. Coolant keeps your engine cool under duress. If the thermostat is stuck open, the engine is staying too cool. Your heat is run off of your engine temperature.
There is a valve called a petcock along the bottom edge of the radiator. Its used to drain the radiator. The low level float or sensor being stuck or bad is a more likely cause of the problem that a wrong mix.