GMC 2007 Acadia Owner's Manual page 418

5. Fill the coolant recovery tank to the FULL
COLD mark.
6. Reinstall the cap on the coolant recovery tank,
but leave the radiator pressure cap off.
418
7. Start the engine and let it run until you can
feel the upper radiator hose getting hot.
Watch out for the engine cooling fan.
8. 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.
Replace the pressure cap.
At any time during this procedure if coolant begins
to flow out of the filler neck, reinstall the pressure
cap. Be sure to secure it tightly.
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