Chevrolet 2003 Impala Owner's Manual page 281

Adding Coolant
If you need more coolant, add the proper DEX-COOL@
coolant mixture at the coolant recovery tank, but be
careful not to spill it.
If the coolant recovery tank is completely empty, add
coolant to the radiator. See Engine Overheating
on
page 5-29.
Turning the radiatc. pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn you
badly. With the coolant recovery tank, you will
almost never have to add coolant at the
radiator. Never turn the radiator pressure
cap
--
even a little
--
when the engine and
radiator are hot.
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Don't spill coolant on a hot engine.
1
Occasionally check the coolant level in the radiator.
For information on
how
to add coolant to the radiator,
see Cooling System on page 5-32.
5-28