2007 CADILLAC STS V heater

Cooling System
When you decide it is safe to lift the hood, this is
what you will see:
A. Engine Cooling Fans
B. Coolant Surge Tank and Pressure CapSome vehicles may have an engine driven fan, as
well as the electric pusher fans which are
located behind the vehicle’s grille.
{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.
When the engine is cold, the coolant level
should be at or slightly above the FULL
COLD/FROID line on the side of the coolant surge
tank. 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.
3.6L V6 Engine shown, 4.6L V8 and 4.4L V8 STS-V
Engines similar
396

{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 395for 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.
397

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.
If no coolant is visible in the surge tank, add
coolant as follows:
1. 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-quarter of a 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.
399

{CAUTION:
Turning the Intercooler System pressure
cap when the engine and intercooler are
hot can allow steam and scalding liquids
to blow out and burn you badly. Never
turn the Intercooler System pressure cap,
even a little, when the engine and
intercooler are hot.
{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
CAUTION: (Continued)
CAUTION: (Continued)
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.
401

Collision Damage Repair............................. 538
Comfort Guides, Rear Safety Belt................. 34
Compact Spare Tire.................................... 475
Compass.............................................. 14, 128
Competitive Driving..................................... 333
Competitive Driving Mode............................ 325
Control of a Vehicle..................................... 320
Convenience Net......................................... 146
Coolant
Engine Temperature Gage........................ 251
Engine Temperature Warning Light........... 251
Heater, Engine......................................... 115
Surge Tank Pressure Cap........................ 393
Cooling System........................................... 396
Cruise Control............................................. 193
Cruise Control, Adaptive.............................. 197
Cruise Control, Forward Collision
Alert (FAC) System.................................. 184
Cruise Control Light.................................... 256
Cupholder(s)................................................ 146
Customer Assistance Information
Courtesy Transportation........................... 534
Customer Assistance for Text
Telephone (TTY) Users......................... 529
Customer Assistance Offices.................... 529
Customer Satisfaction Procedure.............. 526Customer Assistance Information (cont.)
GM Mobility Reimbursement Program...... 530
Reporting Safety Defects to
General Motors..................................... 542
Reporting Safety Defects to the
Canadian Government.......................... 542
Reporting Safety Defects to the
United States Government.................... 542
Roadside Service..................................... 531
Service Publications Ordering
Information........................................... 543
D
Daytime Running Lamps............................. 216
Defensive Driving........................................ 316
Disc, MP3................................................... 297
Diversity Antenna System............................ 314
Doing Your Own Service Work.................... 364
Door
Locks......................................................... 98
Power Door Locks..................................... 99
Programmable Automatic Door Locks......... 99
Rear Door Security Locks........................ 100
Driver
Position, Safety Belt................................... 21
548

Driver Information Center (DIC)................... 258
DIC Controls and Displays....................... 258
DIC Warnings and Messages................... 264
Other Messages....................................... 279
Driving
At Night................................................... 333
City.......................................................... 338
Defensive................................................. 316
Drunken................................................... 317
Freeway................................................... 339
Hill and Mountain Roads.......................... 342
In Rain and on Wet Roads...................... 335
Rocking Your Vehicle to Get it Out.......... 349
Winter...................................................... 344
Dual Climate Control System....................... 230
E
Electric Power Management........................ 221
Electrical System
Add-On Equipment................................... 486
Fuses and Circuit Breakers...................... 487
Headlamp Wiring..................................... 486
Power Windows and Other Power
Options................................................. 487Electrical System (cont.)
Rear Underseat Fuse Block..................... 492
Underhood Fuse Block............................. 488
Windshield Wiper Fuses........................... 486
Engine
Air Cleaner/Filter...................................... 386
Battery..................................................... 408
Check and Service Engine Soon Light..... 252
Coolant.................................................... 389
Coolant Heater......................................... 115
Coolant Temperature Gage...................... 251
Coolant Temperature Warning Light.......... 251
Drive Belt Routing.................................... 519
Engine Compartment Overview ................ 373
Exhaust................................................... 125
Oil ........................................................... 380
Oil Life System........................................ 383
Overheated Protection Operating Mode.... 395
Overheating............................................. 393
Starting.................................................... 113
Supercharger Oil...................................... 385
Entry Lighting.............................................. 220
Event Data Recorders (EDR)...................... 536
Extender, Safety Belt..................................... 37
Exterior Lighting Battery Saver.................... 219
549

Headlamps.................................................. 211
Bulb Replacement.................................... 417
Daytime Running Lamps.......................... 216
Flash-to-Pass........................................... 188
Halogen Bulbs......................................... 418
High Intensity Discharge (HID) Lighting.... 418
High/Low Beam Changer......................... 183
On Reminder........................................... 216
Washer.................................................... 192
Wiper Activated........................................ 215
Head-Up Display (HUD).............................. 223
Heated Seats......................................... 10, 11
Heated Steering Wheel............................... 181
Heater......................................................... 230
Highbeam On Light..................................... 257
High-Speed Operation, Tires........................ 432
Highway Hypnosis....................................... 341
Hill and Mountain Roads............................. 342
Hood
Checking Things Under............................ 372
Release................................................... 372
Horn............................................................ 180
How to Use This Manual................................ 3
How to Wear Safety Belts Properly............... 20I
Ignition Positions......................................... 111
Inadvertent Power Battery Saver................. 222
Infants and Young Children, Restraints .......... 40
Ination - Tire Pressure............................... 431
Inator Kit, Tire........................................... 452
Instrument Panel
Overview.................................................. 178
Instrument Panel (I/P)
Brightness................................................ 220
Cluster..................................................... 242
J
Jump Starting.............................................. 408
K
Keyless Access System................................. 87
Keyless Access System, Operation................ 88
Keys............................................................. 85
551