Chevrolet 2005 Cavalier Owner's Manual page 243

3. 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.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower than
the FULL COLD mark, add more of the proper
mixture to the coolant surge tank until the
level reaches the FULL COLD mark.
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
See your dealer, if necessary.
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 cooling fan.
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