2007 CADILLAC ESCALADE EXT engine overheat

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. 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 re. You or others could be badly
burned. Stop your engine if it overheats,
and get out of the vehicle until the engine
is cool.
CAUTION: (Continued)
CAUTION: (Continued)
SeeOverheated Engine Protection
Operating Mode on page 425for
information on driving to a safe place in
an emergency.
Notice:If your engine catches re 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 425for information on driving to a
safe place in an emergency.
423

If No Steam Is Coming From
Your Engine
The ENGINE OVERHEATED STOP ENGINE or
the ENGINE OVERHEATED IDLE ENGINE
message, along with a low coolant condition, can
indicate a serious problem.
If you get an engine overheat warning, but see or
hear no steam, the problem may not be too
serious. Sometimes the engine can get a little too
hot when you:
Climb a long hill on a hot day.
Stop after high-speed driving.
Idle for long periods in traffic.
Tow a trailer. SeeTowing a Trailer on
page 380.If you get the ENGINE OVERHEATED STOP
ENGINE or the ENGINE OVERHEATED IDLE
ENGINE message with no sign of steam, try this
for a minute or so:
1. If you have an air conditioner and it is on, turn
it off.
2. Turn on your heater to full hot at the highest
fan speed and open the windows as
necessary.
3. In heavy traffic, let the engine idle in
NEUTRAL (N) while stopped. If it is safe to do
so, pull off the road, shift to PARK (P) or
NEUTRAL (N) and let the engine idle.
If you no longer have the overheat warning, you
can drive. Just to be safe, drive slower for
about 10 minutes. If the warning does not come
back on, you can drive normally.
424

If the warning continues, pull over, stop, and park
your vehicle immediately.
If there is still no sign of steam and your vehicle is
equipped with an engine-driven cooling fan,
push down the accelerator until the engine speed
is about twice as fast as normal idle speed for
at least ve minutes while you are parked.
If there is still no sign of steam and your vehicle is
equipped with an electric cooling fan, idle the
engine for ve minutes while you are parked.
If you still have the warning, turn off the engine
and get everyone out of the vehicle until it
cools down. Also, see “Overheated Engine
Protection Operating Mode” later in this section.
You may decide not to lift the hood but to get
service help right away.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 407.
425

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 Fan{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.
426

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.
Notice:Engine damage from running your
engine without coolant is not covered by your
warranty. SeeOverheated Engine Protection
Operating Mode on page 425for 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.
427

{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.
Remove the coolant surge tank pressure
cap by slowly turning the pressure cap
counterclockwise about one full turn. If you
hear a hiss, wait for that to stop. A hiss means
there is still some pressure left.
429

Driver Information Center (DIC)................... 243
DIC Operation and Displays..................... 243
DIC Vehicle Customization....................... 257
DIC Warnings and Messages................... 248
Driving
At Night................................................... 355
City.......................................................... 360
Defensive................................................. 322
Drunken................................................... 323
Freeway................................................... 361
Hill and Mountain Roads.......................... 364
In Rain and on Wet Roads...................... 356
Off-Road.................................................. 339
Recovery Hooks....................................... 371
Rocking Your Vehicle to Get it Out.......... 370
Winter...................................................... 366
Dual Automatic Climate Control System....... 219
DVD
Rear Seat Entertainment System............. 302
E
Electrical System
Add-On Equipment................................... 509
Center Instrument Panel Fuse Block........ 512
Fuses and Circuit Breakers...................... 509
Instrument Panel Fuse Block................... 510Electrical System (cont.)
Power Windows and Other Power
Options................................................. 509
Underhood Fuse Block............................. 513
Windshield Wiper Fuses........................... 509
Engine
Air Cleaner/Filter...................................... 412
Battery..................................................... 437
Check and Service Engine Soon Light..... 236
Coolant.................................................... 419
Coolant Heater......................................... 128
Coolant Temperature Gage...................... 235
Drive Belt Routing.................................... 536
Engine Compartment Overview ................ 406
Exhaust................................................... 141
Fan Noise................................................ 431
Oil ........................................................... 407
Oil Life System........................................ 410
Overheated Protection Operating Mode.... 425
Overheating............................................. 422
Starting.................................................... 126
Entry/Exit Lighting....................................... 212
Event Data Recorders (EDR)...................... 555
Extender, Safety Belt..................................... 38
Exterior Cargo Lamps................................. 211
Exterior Lamps............................................ 204
569

O
Odometer.................................................... 227
Odometer, Trip............................................ 227
Off-Road Driving.......................................... 339
Off-Road Recovery...................................... 335
Oil
Engine..................................................... 407
Pressure Light.......................................... 240
Oil, Engine Oil Life System......................... 410
Older Children, Restraints............................. 39
Online Owner Center................................... 545
OnStar
®System, see OnStar®Manual........ 152
Other Warning Devices................................ 194
Outlet Adjustment........................................ 224
Outlet(s), Accessory Power.......................... 217
Outside
Power Foldaway Mirrors........................... 149
Overheated Engine Protection Operating
Mode....................................................... 425
Owner Checks and Services....................... 529
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 505
Park Aid...................................................... 213
Park (P)
Shifting Into............................................. 138
Shifting Out of......................................... 140
Parking
Assist....................................................... 213
Brake....................................................... 136
Over Things That Burn............................ 140
Passenger Airbag Status Indicator............... 230
Passenger Sensing System........................... 78
Passing....................................................... 336
PASS-Key
®III+........................................... 120
PASS-Key®III+ Operation........................... 121
Power
Accessory Outlet(s).................................. 217
Door Locks.............................................. 102
Electrical System..................................... 509
Lumbar Controls.......................................... 9
Reclining Seatbacks................................... 14
574