Buick Automobile User Manual page 312

How to Add Coolant to the Cooling
System (5.3L V8 Engine)
Notice: The engine has a specific cooling system
drain and fill procedure. Failure to follow this
procedure could cause the engine to overheat and
be severely damaged. If the engine's cooling system
needs to be drained and re-filled, please see the
dealer/retailer.
If you hear a hiss, wait for that to stop. A hiss
means that there is still some pressure left.
2. Then keep turning the pressure cap and remove it.
5-42
1. You can remove the
pressure cap when the
cooling system,
including the pressure
cap and upper
radiator hose is no
longer hot. Turn
the pressure cap slowly
counterclockwise.
CAUTION:
{
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. Do not spill coolant on a hot engine.
3. Fill the cooling system with the proper DEX-COOL
coolant mixture, up to the base of the filler neck.
See Engine Coolant on page 5-27 Engine Coolant
for more information about the proper coolant
mixture.
4. Rinse or wipe any spilled coolant from the engine
and the compartment.
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