How To Add Coolant To The Radiator - GMC 2001 Safari Owner's Manual

How to Add Coolant to the Radiator

Turn the pressure cap slowly counterclockwise until
it first stops. (Don't press down while turning the
pressure cap.)
If you hear a hiss, wait for that to stop. A hiss means
there is still some pressure left.
See "Engine Compartment Overview" in the Index
for more information on location.
1. You can remove
the radiator
pressure cap when
the cooling system,
including the
radiator pressure
cap and upper
radiator hose, is no
longer hot.
2. Then keep turning
the pressure cap,
but now push down
as you turn it.
Remove the
pressure cap.
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