Pontiac Solstice 2008 Owner's Manual page 226

2.0L L4 Engine
A. Coolant Surge Tank and Pressure Cap
B. Electric Engine Cooling Fan (Out of View)
5-30
CAUTION:
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An electric engine cooling fan under the hood
can start up even when the engine is not
running and can injure you. Keep hands,
clothing, and tools away from any underhood
electric fan.
If the coolant inside the coolant surge tank is boiling,
do not do anything else until it cools down. The vehicle
should be parked on a level surface.
The coolant level should be at the COLD FILL line.
If it is not, you may have a leak at the pressure cap or
in the radiator hoses, heater hoses, radiator, water
pump, or somewhere in the cooling system.