Chevrolet 2005 Uplander Owner's Manual page 345

6. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fans.
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-COOL
through the filler neck until the level reaches
the base of the filler neck.
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. If your vehicle
has the 3.5L V6 engine, be sure the arrow on
the pressure cap lines up with the vent tube.
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coolant mixture
9. Then fill the coolant recovery tank to the full
cold mark.
10. Put the cap back on the coolant recovery tank.
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