Pontiac 2006 Grand Prix - Manual (Page 345)

How to Add Coolant to the Cooling
System (5.3L V8 Engine)
Notice: Your engine has a specific cooling system
drain and fill procedure. Failure to follow this
procedure could cause your engine to overheat
and be severely damaged. If your engine’s cooling
system needs to be drained and re-filled, please see
your dealer.
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.
1. 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 to remove the
pressure cap.
{ 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 5-25 for more
information about the proper coolant mixture.
4. Rinse or wipe any spilled coolant from the engine
and the compartment.
5. Then fill the coolant recovery tank to the cold
fill line.
6. Install the coolant recovery tank cap and the
pressure cap.
7. If the coolant in the recovery tank is constantly low,
you should have a dealership service department
inspect your vehicle for leaks.
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