Coolant Surge Tank Pressure Cap; Engine Overheating - Hummer 2007 H2 Owner's Manual

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 402 for more
information on location.

Engine Overheating

You will find a coolant temperature gage on your
vehicle's instrument panel. See Engine Coolant
Temperature Gage on page 213.
In addition, you will find an ENGINE COOLANT
HOT, ENGINE OVERHEATED and a REDUCED
ENGINE POWER message in the Driver
Information Center (DIC) on the instrument panel.
See DIC Warnings and Messages on page 226.
418
If Steam Is Coming From Your Engine
CAUTION:
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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. 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 the vehicles
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 420 for
information on driving to a safe place in
an emergency.