How To Add Coolant To The Radiator - GMC 2004 Canyon Owner's Manual

How to Add Coolant to the Radiator

1. Turn the pressure cap slowly counterclockwise
about one full turn.
5-34
You can remove the
radiator pressure cap
when the cooling system,
including the upper
radiator hose,
is no longer hot.
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
2. Then keep turning the cap to remove it.
3. Fill the radiator with the proper DEX-COOL
coolant mixture, up to the base of the filler
neck. See Engine Coolant on page 5-25 for more
information about the proper coolant mixture.
4. Then fill the coolant recovery tank to the
FULL COLD mark.
5. Reinstall the cap on the coolant recovery tank,
but leave the radiator pressure cap off.
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