Chevrolet 2003 Cavalier Owner's Manual page 248

2. Then keep turning the
pressure cap slowly,
and remove it.
3. Then fill the coolant surge tank with the proper
mixture, to the hash mark
on
the label. Wait about
five minutes, then check to see if the level is
below the hash mark. If the level is below the hash
mark, add additional coolant to bring the level
up to the hash mark. Repeat this procedure until
the level remains constant at the hash mark
for at least five minutes.
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