Chevrolet B7 2001 Owner's Manual page 102

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 cooling fan.
3-22
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 DEX
through the filler neck until the level reaches the
base of the filler neck.
R
-
COOL coolant mixture
8. Then 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 the arrows
on the pressure cap
line up like this.