It sounds like a blown head gasket to me. Take it to someone that has a exhaust gas measuring tool and they can tell you for sure if it is the head gasket.
My coolant light come on want can it be.
Chevy sells a tank additive that removes corrosion from the sending unit that uses resitance to gage how much fuel in tank. Check your local dealer for the additive, the gage usually shows an erratic reading due to corrosion, bad fuel quality at the pumps.
The fuel gages, the battery gage, the oil pressure gage, and the coolant gage are on the upper instrument cluster?
because you need coolant.
the coolant temperature sensor is faulty. It will need to be replaced
The light you are describing indicates low coolant level in the coolant reservoir.
Check coolant level Could be a bad tenperature sensor or gauge Could be a bad thermostat not opening to allow coolant flow
It could be that your coolant level is low or you have other coolant system problems. Whenever the check engine light is on, use a code scanner to find out why.
Because you overheated it and blew it up
Could be a clogged radiator Could be water pump is not circulating coolant
There is usually an ECT (engine coolant temp) sensor and a CTS (coolant temp sensor) located around the thermostat housing mounted in the intake. One sends coolant temp to the guage, the other sends temp to computer.
I have an 1995 Taurus with 3.0 L engine with an erratic temp gage. I found a cure by cleaning the connection where the wire plugs into the sensor on the engine & putting dielectric grease on it.