2007 CADILLAC DTS PROFESSIONAL engine overheat

{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.
{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 are not, your vehicle
needs service.
Notice:Engine damage from running your
engine without coolant is not covered by your
warranty. SeeOverheated Engine Protection
Operating Mode on page 379for 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 could 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.
381

{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.
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
2. Then keep turning the cap and remove it.
383

Driving
At Night................................................... 318
City.......................................................... 322
Defensive................................................. 302
Drunken................................................... 303
Freeway................................................... 323
Hill and Mountain Roads.......................... 326
In Rain and on Wet Roads...................... 320
Rocking Your Vehicle to Get it Out.......... 333
Winter...................................................... 328
Dual Climate Control System....................... 210
E
EDR ............................................................ 500
Electrical System
Add-On Equipment................................... 451
Fuses and Circuit Breakers...................... 452
Headlamp Wiring..................................... 451
Power Windows and Other
Power Options...................................... 452
Rear Underseat Fuse Block..................... 455
Underhood Fuse Block............................. 452
Windshield Wiper Fuses........................... 451Engine
Air Cleaner/Filter...................................... 370
Check and Service Engine
Soon Light............................................ 234
Coolant.................................................... 374
Coolant Heater......................................... 121
Coolant Temperature Gage...................... 233
Coolant Temperature Warning Light.......... 233
Drive Belt Routing.................................... 477
Engine Compartment Overview................ 364
Exhaust................................................... 130
Oil ........................................................... 365
Oil Life System........................................ 368
Overheated Protection
Operating Mode.................................... 379
Overheating............................................. 377
Running While Parked............................. 131
Starting.................................................... 119
Entry Lighting.............................................. 200
Event Data Recorders................................. 500
Extender, Safety Belt..................................... 42
Exterior Lamps............................................ 193
Exterior Lighting Battery Saver.................... 199
507

N
Navigation System, Privacy......................... 501
Navigation/Radio System,
see Navigation Manual............................. 296
New Vehicle Break-In.................................. 117
Normal Maintenance
Replacement Parts................................... 476
O
Odometer.................................................... 224
Off-Road Recovery...................................... 315
Oil
Engine..................................................... 365
Pressure Light.......................................... 237
Oil, Engine Oil Life System......................... 368
Older Children, Restraints............................. 42
Online Owner Center................................... 485
OnStar, Privacy........................................... 501
OnStar
®System, see OnStar®Manual........ 139
Operation, Universal Home
Remote System..............................144, 148
Other Warning Devices................................ 164
Outlet Adjustment........................................ 217Outlets
Accessory Power..................................... 208
Outside
Automatic Dimming Mirror........................ 138
Convex Mirror.......................................... 138
Curb View Assist Mirror........................... 138
Heated Mirrors......................................... 138
Power Foldaway Mirrors........................... 137
Overheated Engine Protection
Operating Mode....................................... 379
Owner Checks and Services....................... 471
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 447
Panic Brake Assist...................................... 312
Parade Dimming.......................................... 200
Park Aid...................................................... 202
Park (P)
Shifting Into............................................. 126
Shifting Out of......................................... 129
Parking
Assist....................................................... 202
Brake....................................................... 125
Over Things That Burn............................ 129
512