2006 CADILLAC STS ECU

Coolant Surge Tank Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank. SeeEngine
Compartment Overview on page 5-12for more
information on location.
Engine Overheating
You will nd an ENGINE COOLANT HOT IDLE
ENGINE, an ENGINE OVERHEATED STOP ENGINE
and a CHECK COOLANT LEVEL message displayed in
the Driver Information Center (DIC). SeeDIC Warnings
and Messages on page 3-79for more information.
There is also a coolant temperature gage and a coolant
warning light on the instrument panel. SeeEngine
Coolant Temperature Gage on page 3-67andEngine
Coolant Temperature Warning Light on page 3-66
for more information.
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. Just 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 your 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.
SeeOverheated Engine Protection Operating
Mode on page 5-31for 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. SeeOverheated Engine Protection
Operating Mode on page 5-31for information on
driving to a safe place in an emergency.
5-30

Tire Chains
{CAUTION:
If your vehicle has P255/45R17, P255/45R18,
P275/40R19, or 255/45ZR18 size tires, do not
use tire chains, as there is not enough
clearance.
Tire chains used on a vehicle without the
proper amount of clearance can cause damage
to the brakes, suspension, or other vehicle
parts. The area damaged by the tire chains
could cause you to lose control of your vehicle
and you or others may be injured in a crash.
Use another type of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination and road
conditions. Follow that manufacturer’s
instructions. To help avoid damage to your
vehicle, drive slowly, readjust, or remove the
device if it is contacting your vehicle, and do
not spin your vehicle’s wheels.
If you do nd traction devices that will t,
install them on the rear tires only.Notice:If your vehicle has P235/50R17 95S size
tires, use tire chains only where legal and only when
you must. Use only SAE Class S-type chains that
are the proper size for your tires. Install them on the
rear tires and tighten them as tightly as possible
with the ends securely fastened. Drive slowly
and follow the chain manufacturer’s instructions.
If you can hear the chains contacting your vehicle,
stop and retighten them. If the contact continues,
slow down until it stops. Driving too fast or spinning
the wheels with chains on will damage your
vehicle.
5-78

Compact Spare Tire and Tools
Use the following diagram as a guide for storing the
compact spare tire and tools in the trunk:
A. Compact Spare
Tire Cover
B. Plastic Wing Nut
C. Retainer
D. Jack Container Package
(With Wheel Wrench
and Jack)E. Compact Spare Tire
F. Foam Support
G. Bolt
H. Wheel Wrench
I. Jack
J. Jack Container1. Open the trunk. SeeTrunk on page 2-14.
2. Ensure the foam support (F) is in place in the
trunk area.
3. Reinstall the compact spare tire (E) with the valve
stem up, and line up the wheel nut hole with the
bolt (G) or wheel center and place on the
compartment oor.
4. Insert the jack container (J) with wheel wrench (H)
and jack (I) into the center of the compact spare
tire making sure to line up the wheel nut hole with
the bolt (G) on the compartment oor.
5. Secure the tire and wheel with the retainer (C) and
wing nut (B).
6. Reinstall the compact spare tire cover (A).
5-93

{CAUTION:
A safety belt that is not properly routed
through the seat cushion or is twisted will not
provide the protection needed in a crash. If the
safety belt has not been routed through the
seat cushion at all, it will not be there to work
for the next passenger. The person sitting in
that position could be badly injured. After
reinstalling the seat cushion, always check to
be sure that the safety belts are properly
routed and are not twisted.
1. Buckle the center passenger position safety belt,
then route the safety belts through the proper slots
in the seat cushion. Do not let the safety belts
get twisted.
2. Slide the rear of the cushion up and under the
seatback so the rear-locating guides hook into
the wire loops on the back frame.3. With the seat cushion lowered, push rearward and
then press down on the seat cushion until the
spring locks on both ends engage.
4. Check to make sure the safety belts are properly
routed and that no portion of any safety belt is
trapped under the seat. Also make sure the seat
cushion is secured.
Rear Underseat Fuse Block
There is a fuse block located under the rear seat on the
driver’s side and passenger’s side of the vehicle. The
rear seat cushion must be removed to access the
fuse blocks. See “Removing the Rear Seat Cushion”
listed previously in this section.
To access the fuses, push in the two tabs, then lift the
cover off.
Your vehicle may not have all the fuses listed next.
5-111

At Each Fuel Fill
It is important to perform these underhood checks at
each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-18for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-26for further details.
Intercooler Coolant Level Check
(4.4L Supercharged Engine)
Check the coolant level and add DEX-COOL®coolant
mixture if necessary. SeeEngine Coolant on page 5-26
for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the
windshield washer uid reservoir and add the proper
uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your vehicle’s tires and make sure they
are inated to the correct pressures. Do not forget to
check the spare tire. SeeTires on page 5-56for further
details. Check to make sure the spare tire is stored
securely. SeeChanging a Flat Tire (STS Only) on
page 5-83.
Tire Wear Inspection
Tire rotation is recommended if your vehicle has the
same size tires at all four wheel positions and may
be required for high mileage highway drivers prior to
the Engine Oil Life System service notication. Check
the tires for wear and, if necessary, rotate the tires.
SeeTire Inspection and Rotation on page 5-70.
6-9

Chains, Tire...................................................5-78
Charging System Light....................................3-63
Check
Engine Light...............................................3-67
Checking Things Under the Hood......................5-10
Chemical Paint Spotting.................................5-101
Child Restraints
Child Restraint Systems...............................1-32
Infants and Young Children...........................1-29
Lower Anchors and Tethers for Children..........1-37
Older Children.............................................1-26
Securing a Child Restraint in a
Rear Seat Position...................................1-44
Securing a Child Restraint in the
Right Front Seat Position..........................1-46
Where to Put the Restraint...........................1-36
Cigarette Lighter.............................................3-47
Cleaning
Aluminum or Chrome-Plated Wheels..............5-99
Exterior Lamps/Lenses.................................5-98
Fabric/Carpet..............................................5-96
Finish Care.................................................5-98
Inside of Your Vehicle..................................5-94
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-97
Leather......................................................5-96
Speaker Covers..........................................5-97
Tires........................................................5-100
Underbody Maintenance.............................5-101Cleaning (cont.)
Washing Your Vehicle...................................5-98
Weatherstrips..............................................5-97
Windshield and Wiper Blades........................5-99
Wood Panels..............................................5-97
Climate Control System
Air Filter, Passenger Compartment.................3-55
Dual ..........................................................3-48
Outlet Adjustment........................................3-54
Rear ..........................................................3-54
Collision Damage Repair..................................7-10
Comfort Guides, Rear Safety Belt.....................1-23
Compact Spare Tire........................................5-94
Compass.................................................1-7, 2-42
Competitive Driving.........................................4-18
Competitive Driving Mode................................4-10
Control of a Vehicle.......................................... 4-6
Convenience Net............................................2-51
Coolant
Engine Temperature Gage............................3-67
Engine Temperature Warning Light.................3-66
Heater, Engine............................................2-27
Surge Tank Pressure Cap.............................5-30
Cooling System..............................................5-32
Cruise Control................................................3-16
Cruise Control, Adaptive..................................3-19
Cruise Control, Forward Collision Alert (FAC)
System........................................................ 3-9
Cruise Control Light........................................3-72
3

Cupholder(s)..................................................2-51
Customer Assistance Information
Courtesy Transportation.................................. 7-7
Customer Assistance for Text
Telephone (TTY) Users............................... 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-5
Reporting Safety Defects to General Motors....7-14
Reporting Safety Defects to the
Canadian Government..............................7-13
Reporting Safety Defects to the
United States Government.........................7-13
Roadside Service.......................................... 7-5
Service Publications Ordering Information........7-14
D
Daytime Running Lamps..................................3-35
Defensive Driving............................................. 4-2
Diversity Antenna System...............................3-122
Doing Your Own Service Work........................... 5-4
Door
Locks........................................................2-12
Power Door Locks.......................................2-12
Programmable Automatic Door Locks.............2-13
Rear Door Security Locks.............................2-13Driver
Position, Safety Belt.....................................1-13
Driver Information Center (DIC).........................3-73
DIC Controls and Displays............................3-74
DIC Warnings and Messages........................3-79
Other Messages..........................................3-93
Driving
At Night.....................................................4-18
City ...........................................................4-22
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-23
Hill and Mountain Roads..............................4-25
In Rain and on Wet Roads...........................4-20
Rocking Your Vehicle to Get it Out.................4-32
Winter........................................................4-27
Dual Climate Control System............................3-48E
Electrical System
Add-On Equipment.....................................5-104
Fuses and Circuit Breakers.........................5-105
Headlamp Wiring.......................................5-104
Power Windows and Other Power Options....5-105
Rear Underseat Fuse Block.........................5-110
Underhood Fuse Block...............................5-106
Windshield Wiper Fuses.............................5-104
4

J
Jump Starting.................................................5-45
K
Keyless Access System..................................... 2-4
Keyless Access System, Operation...................... 2-5
Keys............................................................... 2-3
L
Labeling, Tire Sidewall.....................................5-58
Lamps
Battery Load Management............................3-40
Exterior Lighting Battery Saver......................3-38
Fog ...........................................................3-37
Inadvertent Power Battery Saver....................3-40
Reading.....................................................3-40
Twilight Sentinel
®........................................3-37
LATCH System
Child Restraints...........................................1-37
Lifting Your Vehicle, Tires.................................5-79
Light
Airbag Readiness........................................3-60
Anti-Lock Brake System Warning...................3-65
Brake System Warning.................................3-64
Charging System.........................................3-63
Cruise Control.............................................3-72Light (cont.)
Engine Coolant Temperature Warning.............3-66
Fog Lamp ..................................................3-71
Highbeam On.............................................3-72
Lights On Reminder.....................................3-71
Low Tire Pressure Warning Light...................3-65
Malfunction Indicator....................................3-67
Oil Pressure...............................................3-70
Passenger Airbag Status Indicator..................3-61
Passenger Safety Belt Reminder....................3-60
Safety Belt Reminder...................................3-59
Security.....................................................3-71
TCS Warning Light......................................3-66
Traction Control System (TCS) Warning..........3-66
Lighting
Entry.........................................................3-39
Parade Dimming..........................................3-39
Limited-Slip Rear Axle.....................................4-11
Loading Your Vehicle.......................................4-32
Lockout Protection..........................................2-14
Locks
Door ..........................................................2-12
Lockout Protection.......................................2-14
Power Door ................................................2-12
Programmable Automatic Door Locks.............2-13
Rear Door Security Locks.............................2-13
Loss of Control...............................................4-17
Lumbar
Power Controls............................................. 1-2
7