Pontiac Montana SV6 2007 Owner's Manual page 440

2. Keep turning the pressure cap. Remove the
pressure cap.
CAUTION:
{
You can be burned if you spill coolant
on hot engine parts. Coolant contains
ethylene glycol and it will burn if the engine
parts are hot enough. Do not spill coolant
on a hot engine.
3. Fill the radiator with the proper DEX-COOL
coolant mixture, up to the base of the filler
neck. See Engine Coolant on page 430
for more information about the proper
coolant mixture.
440
4. Rinse or wipe any spilled coolant from the
engine and the compartment.
5. Start the engine and let it run until you can
feel the upper radiator hose getting hot.
Watch out for the engine cooling fans.
6. By this time, the coolant level inside the
radiator filler neck may be lower. If the level is
lower, add more of the proper DEX-COOL
coolant mixture through the filler neck until the
level reaches the base of the filler neck.
7. Then replace the pressure cap. At any time
during this procedure if coolant begins to flow
out of the filler neck, reinstall the pressure cap.
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Be sure the pressure cap is closed properly.
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