overheating CADILLAC CTS 2004 1.G User Guide

Adding Coolant
If you need more coolant, add the proper DEX-COOL®
coolant mixture at the surge tank, but only when the
engine is cool.
{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.
When replacing the pressure cap, make sure it
is hand-tight.
Coolant Surge Tank Pressure Cap
Notice:If the surge tank pressure cap is not tightly
installed, coolant loss and possible engine damage
may occur. Be sure the cap is properly and
tightly secured.
Engine Overheating
There are three engine hot messages that may be
displayed in the Driver Information Center (DIC).
SeeDIC Warnings and Messages on page 3-70
for more information.
Overheated Engine Protection
Operating Mode
This operating mode allows your vehicle to be driven to
a safe place in an emergency. Should an overheated
engine condition exist, an overheat protection mode
which alternates ring groups of cylinders helps prevent
engine damage. In this mode, you will notice a loss
in power and engine performance. A low coolant and/or
engine overheat warning will indicate that 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 and change the oil.
SeeEngine Oil on page 5-18.
5-31

The coolant level should be at or slightly above the
FULL COLD/FROID line on the side of the coolant surge
tank. If it isn’t, you may have a leak at the pressure
cap or in the radiator hoses, heater hoses, radiator,
water pump or somewhere else in the cooling system.
{CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Do not touch them.
If you do, you can be burned.
Do not run the engine if there is a leak. If you
run the engine, it could lose all coolant.
That could cause an engine re, and you could
be burned. Get any leak xed before you drive
the vehicle.
If there seems to be no leak, with the engine on, check
to see if the electric engine cooling fans are running.
If the engine is overheating, both fans should be
running. If they aren’t, your vehicle needs service.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty.
Notice:Using coolant other than DEX-COOL
®may
cause premature engine, heater core or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at 30,000 miles (50 000 km)
or 24 months, whichever occurs rst. Any repairs
would not be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your vehicle.
5-35

Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service,
see your GM Warranty booklet for details. For additional
information refer to the tire manufacturer’s booklet
included with your vehicle’s Owner’s Manual.
{CAUTION:
Poorly maintained and improperly used
tires are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and a
serious accident. SeeLoading Your
Vehicle on page 4-34.
CAUTION: (Continued)
CAUTION: (Continued)

Underinated tires pose the same danger
as overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be
checked when your tires are cold.
SeeInflation - Tire Pressure on page 5-67.
Overinated tires are more likely to be cut,
punctured or broken by a sudden impact,
such as when you hit a pothole. Keep tires
at the recommended pressure.
Worn, old tires can cause accidents.
If your tread is badly worn, or if your tires
have been damaged, replace them.
SeeInflation - Tire Pressure on page 5-67
for ination pressure adjustment for high
speed driving.
5-58

Engine
Air Cleaner/Filter.........................................5-24
Battery.......................................................5-45
Check and Service Engine Soon Light............3-47
Check Oil Pressure Message........................3-58
Coolant......................................................5-29
Coolant Heater............................................2-25
Coolant Temperature Gage...........................3-46
Coolant Temperature Warning Light................3-45
Engine Compartment Overview......................5-12
Exhaust.....................................................2-39
Oil .............................................................5-18
Oil Temperature Warning Message.................3-58
Overheating................................................5-31
Starting......................................................2-24
Engine Coolant Hot – AC (Air Conditioning) Off......3-76
Engine Coolant Hot – Idle Engine.....................3-76
Engine Cooling When Trailer Towing..................4-45
Engine Oil Additives........................................5-21
Engine Overheated – Stop Engine....................3-77
Engine Power Reduced...................................3-77
Engine Specications.....................................5-112
Engine Speed Limiter......................................3-41
Entering the Personalization Menu.....................3-89
Entry Lighting.................................................3-27
Erasing HomeLink
®Buttons..............................2-50
Event Data Recorders (EDR)............................. 7-9Exiting the Personalization Menu.....................3-107
Express-Down Window....................................2-15
Express-Up Window........................................2-15
Extender, Safety Belt.......................................1-28
Exterior Lamps...............................................3-24
Exterior Lighting Battery Saver..........................3-26
F
Filter
Engine Air Cleaner......................................5-24
Finding a Station...........................................3-110
Finish Care....................................................5-95
Finish Damage...............................................5-97
Five-Speed (CTS)...........................................2-33
Flash-To-Pass Feature.....................................3-11
Flat Tire........................................................5-79
Flat Tire, Changing.........................................5-81
Fluid
Automatic Transmission................................5-25
Manual Transmission....................................5-27
Power Steering...........................................5-40
Windshield Washer......................................5-41
FM Stereo....................................................3-125
Fog Lamp Light..............................................3-51
Fog Lamps....................................................3-13
6