Pontiac 1997 Grand Am Owner's Manual page 214

3. Then fill the coolant surge tank with the proper mix,
up to FULL COLD, or just above the small cvlinder
at the base of the opening.
4. With the coolant surge tank pressure cap off, start the
engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the
engine fan.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mix to the coolant surge tank
until the level reaches FULL COLD, or just above
the small cylinder at the base of the opening.
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