GMC 1998 Safari Owner's Manual page 237

Cooling System
When you decide it's safe to lift the hood, here's what
you'll see:
The coolant level should be at the
ADD
mark.
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Fan
If the coolant inside the C'O'cilant r6t6very tank is boiling,
don't do anything else until it cools down.
1
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.
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