Pontiac 1998 Trans Sport Owner's Manual page 308

When you decide it's safe to lift the hood, here's what
you'll see:
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 recovery tank is boiling,
don't do anything else until it cools down.
A. Radiator Pressure Cap
B.
Electric Engine Fans
C. Coolant Recovery Tank
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