Cadillac 2006 STS - Manual (Page 343)

Coolant Surge Tank 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.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank. See Engine
Compartment Overview on page 5-12 for more
information on location.
Engine Overheating
You will find an ENGINE COOLANT HOT IDLE
ENGINE, an ENGINE OVERHEATED STOP ENGINE
and a CHECK COOLANT LEVEL message displayed in
the Driver Information Center (DIC). See DIC Warnings
and Messages on page 3-79 for more information.
There is also a coolant temperature gage and a coolant
warning light on the instrument panel. See Engine
Coolant Temperature Gage on page 3-67 and Engine
Coolant Temperature Warning Light on page 3-66
for more information.
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
everyone away from the vehicle until it cools
down. Wait until there is no sign of steam or
coolant before you open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch fire. You
or others could be badly burned. Stop your
engine if it overheats, and get out of the
vehicle until the engine is cool.
See Overheated Engine Protection Operating
Mode on page 5-32 for information on driving
to a safe place in an emergency.
Notice: If your engine catches fire because you
keep driving with no coolant, your vehicle can be
badly damaged. The costly repairs would not be
covered by your warranty. See Overheated Engine
Protection Operating Mode on page 5-32 for
information on driving to a safe place in an
emergency.
5-31