2007 CADILLAC STS check engine light

3. Fill the coolant surge tank with the proper
DEX-COOL®coolant mixture, to slightly
above the FULL COLD/FROID line on the
side of the coolant surge tank.
4. With the coolant surge tank pressure cap off,
start the engine and let it run until you can
feel the upper radiator hose getting hot. The
upper radiator hose is the largest of the
hoses which comes out of the radiator, on the
passenger side of the vehicle. Watch out
for the engine cooling fans.By this time, the coolant level inside the
coolant surge tank may be lower. If the level
is lower, add more of the proper mixture
to the coolant surge tank until the level
reaches the FULL COLD/FROID line on the
side of the coolant surge tank.
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
Start the engine and allow it to warm up.
How to Add Coolant to the Intercooler
System Fill Neck (4.4L V8 STS-V
Engine Only)
If you have not found a problem yet, turn the
engine off and allow it to cool down, then check to
see if coolant is visible within the horizontal
tube section of the ll neck. If coolant is not visible,
add a 50/50 mixture of clean, drinkable water
and DEX-COOL
®coolant to the ll neck. Be sure
the Intercooler System, including the Intercooler
System pressure cap, is cool before doing so. See
Engine Coolant on page 389for more information.
400

The underhood fuse block is located in the front of
the engine compartment on the passenger’s
side of the vehicle. SeeEngine Compartment
Overview on page 373for more information
on location and removal procedure for the front
compartment underhood sights shields.
To access the fuses, push in the tabs located on
each side of the fuse block cover, then lift the
cover off.
Fuses Usage
BLOWER Blower Motor
R REAR Passenger’s Side Rear Fuse Block
I/P OUTLET Front Accessory Power Outlet
CCP Climate Control, Headlamp Leveling
PRE 02/CAMOxygen Sensor, Variable Intake (V6),
Purge Solenoid (V6), Camshaft
Phasers (V6)
R REAR Passenger’s Side Rear Fuse Block
WPR SW Wiper/Washer Switch
FOG LAMP Fog Lamps
OUTLET Rear Accessory Power Outlet
EVEN COILSEven Ignition Coils, Even Fuel
Injectors
Fuses Usage
L REAR Driver’s Side Rear Fuse Block
WPR MOD Wiper Module
POST 02 Oxygen Sensor
COMP CLTCH Air Conditioner Compressor Clutch
STARTER Starter Solenoid
ABS Anti-lock Brake Pump
L REAR Driver’s Side Rear Fuse Block
RAIN SSRRain Sensor, Headlamp Washer,
Tire Pressure Monitor
CCP Climate Control
SMT BM-OPT IntelliBeam™ Relay (If Equipped)
EXT LIGHTSLow Beam Relay, High Beam Relay,
Park Lamp Relay
VOLT CHECK Instrument Panel Module
ECM/TCMEngine Control Module (ECM),
Transmission Control Module (TCM),
Easy Key Module, Instrument Panel
Cluster
SPARE Spare
SPARE Spare
LT PARKDriver’s Side Park Lamp, Driver’s
Side Taillamp
489

C
Calibration............................................ 14, 128
California Fuel............................................. 366
California Proposition 65 Warning................ 363
Canadian Owners........................................... 3
Capacities and Specications...................... 498
Carbon Monoxide..............101, 125, 344, 357
Care of
Safety Belts............................................. 479
Your CD Player........................................ 313
Your CDs ................................................. 313
CD, MP3 ..................................................... 297
Center Console Storage Area...................... 146
Chains, Tire................................................. 447
Charging System Light................................ 247
Check
Engine Light............................................ 252
Checking Things Under the Hood................ 372
Chemical Paint Spotting.............................. 484
Child Restraints
Child Restraint Systems............................. 44
Infants and Young Children........................ 40
Lower Anchors and Tethers for Children..... 50
Older Children........................................... 38
Securing a Child Restraint in a Rear
Seat Position.......................................... 57Child Restraints (cont.)
Securing a Child Restraint in the Right
Front Seat Position................................. 59
Where to Put the Restraint........................ 48
Cigarette Lighter.......................................... 229
Cleaning
Aluminum or Chrome-Plated Wheels........ 482
Exterior Lamps/Lenses............................. 480
Fabric/Carpet........................................... 477
Finish Care.............................................. 481
Inside of Your Vehicle .............................. 476
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 479
Leather.................................................... 478
Speaker Covers....................................... 479
Tires........................................................ 483
Underbody Maintenance........................... 483
Washing Your Vehicle .............................. 480
Weatherstrips........................................... 480
Windshield and Wiper Blades................... 481
Wood Panels........................................... 479
Climate Control System
Air Filter, Passenger Compartment........... 239
Dual......................................................... 230
Outlet Adjustment..................................... 237
Rear........................................................ 237
Clock.......................................................... 281
547

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

O
Odometer.................................................... 243
Off-Road Recovery...................................... 330
Oil
Engine..................................................... 380
Pressure Light.......................................... 255
Supercharger, Engine............................... 385
Oil, Engine Oil Life System......................... 383
Older Children, Restraints............................. 38
Online Owner Center................................... 528
OnStar
®System, see OnStar®Manual........ 132
Operation, Universal Home Remote
System............................................137, 142
Other Warning Devices................................ 180
Outlet Adjustment........................................ 237
Outlet(s), Accessory Power.......................... 228
Outside
Automatic Dimming Mirror........................ 131
Convex Mirror.......................................... 131
Parallel Park Assist Mirror........................ 131
Power Heated Mirrors.............................. 130
Overheated Engine Protection
Operating Mode....................................... 395
Owner Checks and Services....................... 512
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 483
Panic Brake Assist...................................... 327
Parade Dimming.......................................... 220
Park Aid...................................................... 226
Park (P)
Shifting Into............................................. 122
Shifting Out of......................................... 124
Parking
Assist....................................................... 226
Brake....................................................... 121
Over Things That Burn............................ 124
Passenger Airbag Status Indicator............... 245
Passenger Compartment Air Filter............... 239
Passenger Sensing System........................... 74
Passing....................................................... 330
Power
Accessory Outlet(s).................................. 228
Door Locks................................................ 99
Electrical System..................................... 487
Inadvertent Battery Saver ......................... 222
Lumbar Controls.......................................... 9
Reclining Seatbacks................................... 11
Retained Accessory (RAP)....................... 112
Seat............................................................ 9
554

Reporting Safety Defects
Canadian Government............................. 542
General Motors........................................ 542
United States Government....................... 542
Restraint System Check
Checking the Restraint Systems................. 80
Replacing Restraint System Parts
After a Crash......................................... 81
Retained Accessory Power (RAP)................ 112
Right Front Passenger Position,
Safety Belts............................................... 30
Roadside
Service.................................................... 531
Rocking Your Vehicle to Get it Out.............. 349
Routing, Engine Drive Belt.......................... 519
Run-Flat Tires............................................. 429
Running the Engine While Parked............... 126
S
Safety Belt
Passenger Reminder Light....................... 244
Pretensioners............................................. 37
Reminder Light........................................ 243Safety Belts
Care of.................................................... 479
Driver Position........................................... 21
How to Wear Safety Belts Properly............ 20
Questions and Answers About
Safety Belts............................................ 19
Rear Safety Belt Comfort Guides............... 34
Rear Seat Passengers............................... 31
Right Front Passenger Position.................. 30
Safety Belt Extender.................................. 37
Safety Belt Use During Pregnancy............. 30
Safety Belts Are for Everyone.................... 15
Shoulder Belt Height Adjuster.................... 29
Safety Warnings and Symbols......................... 4
Scheduled Maintenance............................... 505
Seats
Head Restraints......................................... 13
Heated and Ventilated Seats...................... 11
Heated Seats............................................. 10
Heated Seats - Rear.................................. 14
Memory................................................... 169
Power Lumbar............................................. 9
Power Reclining Seatbacks........................ 11
Power Seats................................................ 9
556