Chevrolet 1994 Astro Passenger Owner's Manual page 201

I
4. Then fill the
coolant recovery
tank to
FULL.
5. Put the cap back
on the coolant
recovery tank,
but leave the
radiator pressure
cap off.
6. Start the engine
and let it run until
you can feel the
upper radiator
hose getting hot.
Watch out for the
engine fan.
7. By this time the coolant level inside the radiator filler neck may be
lower. If the level is lower, add more of the proper mix through the
filler neck until the level reaches the base of the filler neck.
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