Radiator Pressure Cap; Engine Overheating - Pontiac 2006 GTO Owner's Manual

If the coolant overflow reservoir is completely empty,
add coolant to the radiator. See Engine Overheating on
page 5-26 .
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CAUTION:
Turning the radiator 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.
Occasionally check the coolant in the radiator. For
information on how to add coolant to the radiator, see
Cooling System on page 5-29 .
5-26

Radiator Pressure Cap

Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
See Engine Compartment Overview on page 5-12 for
information on location.

Engine Overheating

Immediate action is required if your engine overheats.
This is indicated by the coolant temperature gage
and the Engine Temp Hot message on the trip computer
display. See Engine Coolant Temperature Gage on
page 3-28 and Trip Computer on page 3-33 for more
information.