2005 CADILLAC ESCALADE ESV engine overheat

Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
REDUCED ENGINE POWER message is displayed, 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. This operating mode allows your vehicle to
be driven to a safe place in an emergency. 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. SeeEngine Oil on
page 5-13.
Cooling System
When you decide it is safe to lift the hood, here is what
you will see:
A. Coolant Surge Tank
B. Coolant Surge Tank Pressure Cap
C. Engine Cooling FanVORTEC™ 6000 High-Output V8 Engine shown,
5000 V8 Engine similar
5-28

{CAUTION:
An electric engine cooling fan under the hood
can start up even when the engine is not
running and can injure you. Keep hands,
clothing and tools away from any underhood
electric fan.
If the coolant inside the coolant surge tank is boiling, do
not do anything else until it cools down. The vehicle
should be parked on a level surface. Check the coolant
level after the system cools down. Some amount of
coolant may be lost due to overheating.The coolant level should
be at or above the FULL
COLD mark. If it is not, 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.
5-29

If your vehicle is equipped with an electric engine
cooling fan, check the coolant temperature gage. If the
coolant temperature is at or above 232°F (111°C),
the electric cooling fan should be running. If it is not,
your vehicle needs service. Turn off the engine.
If your vehicle is equipped with an engine-driven cooling
fan, start the engine again and see if the fan speed
increases when idle speed is doubled by pushing the
accelerator pedal down. If it does not, your vehicle
needs service. Turn off the engine.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty. See
Overheated Engine Protection Operating Mode on
page 5-28for information on driving to a safe place
in an emergency.
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.
How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level is not at or above the FULL COLD
mark, add a 50/50 mixture of clean, drinkable water
and DEX-COOL
®coolant at the coolant surge tank, but
be sure the cooling system, including the coolant
surge tank pressure cap, is cool before you do it. See
Engine Coolant on page 5-23for more information.
If no coolant is visible in the surge tank, add coolant
as follows:
{CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap — even a little — they can come
out at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have
to turn the pressure cap.
5-30

{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle’s coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.
Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{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.
1. You can remove the
coolant surge tank
pressure cap when the
cooling system,
including the coolant
surge tank pressure
cap and upper radiator
hose, is no longer hot.
Turn the pressure cap
slowly counterclockwise
about one full turn.
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
2. Then keep turning the pressure cap slowly, and
remove it.
5-31

Engine Identication
The eighth character in your VIN is the engine code.
This code will help you identify your engine,
specications and replacement parts.
Service Parts Identication Label
You will nd this label on the inside of the glove box.
It is very helpful if you ever need to order parts. On this
label, you will nd the following:
VIN
Model designation
Paint information
Production options and special equipment
Be sure that this label is not removed from the vehicle.
Electrical System
Add-On Electrical Equipment
Notice:Don’t add anything electrical to your vehicle
unless you check with your dealer rst. Some
electrical equipment can damage your vehicle and
the damage wouldn’t be covered by your warranty.
Some add-on electrical equipment can keep other
components from working as they should.
Your vehicle has an airbag system. Before attempting to
add anything electrical to your vehicle, seeServicing
Your Airbag-Equipped Vehicle on page 1-84.
Windshield Wiper Fuses
The windshield wiper motor is protected by an internal
circuit breaker and a fuse. If the motor overheats due to
heavy snow, etc., the wiper will stop until the motor
cools. If the overload is caused by some electrical
problem and not snow, etc., be sure to get it xed.
5-106

Driving (cont.)
Hill and Mountain Roads..............................4-36
In Rain and on Wet Roads...........................4-30
Recovery Hooks..........................................4-43
Rocking Your Vehicle to Get it Out.................4-42
Winter........................................................4-38
Dual Automatic Climate Control System.............3-22
DVD
Rear Seat Entertainment System...................3-84
E
Electrical System
Add-On Equipment.....................................5-106
Center Instrument Panel Fuse Block.............5-110
Fuses and Circuit Breakers.........................5-107
Instrument Panel Fuse Block.......................5-107
Power Windows and Other Power Options....5-107
Underhood Fuse Block...............................5-111
Windshield Wiper Fuses.............................5-106
Engine
Air Cleaner/Filter.........................................5-18
Battery.......................................................5-39
Check and Service Engine Soon Light............3-43
Coolant......................................................5-23
Coolant Heater............................................2-21
Coolant Temperature Gage...........................3-41
Engine Compartment Overview......................5-12Engine (cont.)
Exhaust.....................................................2-28
Fan Noise..................................................5-33
Oil .............................................................5-13
Oil Life System...........................................5-16
Overheated Protection Operating Mode...........5-28
Overheating................................................5-26
Starting......................................................2-19
Entry/Exit Lighting...........................................3-17
Event Data Recorders (EDR)............................. 7-9
Extender, Safety Belt.......................................1-46
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-18
Finish Damage.............................................5-103
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-76
Flat Tire, Changing.........................................5-77
Flat Tire, Storing.............................................5-92
Fluid
Automatic Transmission................................5-21
Power Steering...........................................5-33
Windshield Washer......................................5-34
Fog Lamps....................................................3-16
Front Axle......................................................5-46
5

Message
DIC Warnings and Messages........................3-53
Mirrors
Automatic Dimming Rearview with OnStar
®,
Compass and Temperature Display.............2-30
Outside Automatic Dimming Mirror with
Curb View Assist......................................2-34
Outside Convex Mirror.................................2-33
Outside Heated Mirrors................................2-34
Outside Power Mirrors..................................2-32
MyGMLink.com................................................ 7-3
N
Navigation/Radio System, see
Navigation Manual.......................................3-84
New Vehicle Break-In......................................2-18
Normal Maintenance Replacement Parts............6-16
O
Odometer......................................................3-33
Off-Road Recovery..........................................4-13
Oil
Engine.......................................................5-13
Pressure Gage............................................3-46
Oil, Engine Oil Life System..............................5-16
Older Children, Restraints................................1-47Online Owner Center........................................ 7-3
OnStar
®System, see OnStar®Manual...............2-35
Operating Your All-Wheel-Drive Vehicle Off
Paved Roads..............................................4-16
Other Warning Devices...................................... 3-6
Outlet Adjustment............................................3-28
Outside
Automatic Dimming Mirror with Curb
View Assist.............................................2-34
Convex Mirror.............................................2-33
Heated Mirrors............................................2-34
Power Mirrors.............................................2-32
Overheated Engine Protection
Operating Mode..........................................5-28
Owner Checks and Services.............................6-10
Owners, Canadian............................................... ii
P
Park Aid........................................................3-18
Park (P)
Shifting Into................................................2-26
Shifting Out of............................................2-27
Parking
Assist........................................................3-18
Brake........................................................2-25
Over Things That Burn.................................2-28
Passenger Airbag Status Indicator.....................3-35
Passenger Sensing System..............................1-80
9