Chevrolet 2004 Impala, Owner'S Manual, Page: 292 / 410

Engine Overheating
You will find a coolant temperature gage and a warning
message about a hot engine on your instrument
panel cluster. See Engine Coolant Temperature Gage
on page 3-36 and Hot Coolant Temperature Warning
Message on page 3-43.
Overheated Engine Protection
Operating Mode
This emergency operating mode allows your vehicle to
be driven to a safe place in an emergency situation. If an
overheated engine condition exists, an overheat
protection mode which alternates firing groups of
cylinders helps prevent engine damage. In this mode, you
will notice a significant loss in power and engine
performance. The low coolant light may come on and the
temperature gage will indicate an overheat condition
exists. Driving extended miles (km) and/or towing a trailer
in the overheat protection mode should be avoided.
Notice: After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any
repair. The engine oil will be severely degraded.
Repair the cause of coolant loss, change the oil and
reset the oil life system. See Engine Oil on
page 5-17.
If Steam Is Coming From Your Engine
{
CAUTION:
Steam from an overheated engine can burn
you badly, even if you just open the hood. Stay
away from the engine if you see or hear steam
coming from it. Just turn it off and get
CAUTION: (Continued)
5-30