WRONG. It is not the "low coolant light". It is the "General cooling system alarm light" and your owner's manual essentially calls it that, when it tells you to "go right to a dealer if the light comes on".
Of course, taking a Crossfire to a dealer is foolish - see my sigline below.


ANYWAY:
IT comes on when:

The coolant in the tank is low.
The sensor in the tank is bad.
The water temp is above about 230F (gauge will show this as well).
The engine cooling fan motor is defective.
The fan control module is either defective OR senses an issue with the fan motor.
Communication is lost between the Fan Module and ECM (in this case, the fan will be running at high speed).

There may be other reasons for the light to come on that they don't tell us about.
My money is on a bad sensor in the tank, but I"m not standing next to your car.....