1997 Chevrolet Express Van Owner's Manual - Page 212
1997 Chevrolet Express Van Manual
Page 212 highlights
How to Add Coolant to the Radiator ' 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. 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. 2. Then keep turning the pressure cap, but now push down as you turn it. Remove the pressure cap. 5-19
How
to
Add
Coolant
to
the
Radiator
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. Turn
the pressure cap slowly counterclockwise until it
first stops. (Don't press down while turning the
pressure cap.)
'
2.
Then keep turning the pressure cap, but now push
down
as
you
turn it. Remove the pressure cap.
If
you hear a hiss, wait for that to stop.
A
hiss means
there is still some pressure left.
5-19