Pontiac 1995 Grand Prix Owner's Manual page 194

3.4L L27 (Code X) Engine
The coolant level should be at or above the COLD mark.
If it isn't, you may have a leak in the radiator hoses,
heater hoses, radiator, water pump or somewhere else in
the cooling system.
If the coolant inside the coolant recovery tank is boiling,
don't do anything else until it cools down.
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