Chevrolet 2003 Malibu Owner's Manual page 240

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 fans.
By this time, the coolant level inside the coolant
sIJrge 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.
L
15 PSI
, z i
105 kPa
L
I
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
See your dealer, if necessary.
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