Edmunds Answers     • zaken1 06/11/10 7:37 pm PST      The
radiator on GM cars can only be completely filled when the motor
is cool and running. Try removing the radiator cap when the
engine is started and still cold, and then pour coolant in until
it is filled to overflowing. Replace the cap BEFORE shutting the
motor off.   Top Heating / Cooling Heater Experts View More
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