warning light CADILLAC CTS 2008 2.G Service Manual

{CAUTION:
The brake wear warning sound means that
soon the brakes will not work well. That could
lead to an accident. When you hear the brake
wear warning sound, have your vehicle
serviced.
Notice:Continuing to drive with worn-out brake
pads could result in costly brake repair.
Some driving conditions or climates can cause a brake
squeal when the brakes are rst applied or lightly applied.
This does not mean something is wrong with the brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly tighten wheel nuts
in the proper sequence to torque specications
inCapacities and Specifications on page 5-129.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer/retailer if the brake pedal does not
return to normal height, or if there is a rapid increase
in pedal travel. This could be a sign that brake service
might be required.
Brake Adjustment
Every time you apply the brakes, with or without the
vehicle moving, the brakes adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is complex. Its many
parts have to be of top quality and work well together if
the vehicle is to have really good braking. Your vehicle
was designed and tested with top-quality brake parts.
When you replace parts of the braking system — for
example, when the brake linings wear down and you
need new ones put in — be sure you get new approved
replacement parts. If you do not, the brakes might not
work properly. For example, if someone puts in brake
linings that are wrong for your vehicle, the balance
between the front and rear brakes can change — for
the worse. The braking performance you have come to
expect can change in many other ways if someone puts
in the wrong replacement brake parts.
5-43

Federal Communications
Commission (FCC) and Industry
and Science Canada
The Tire Pressure Monitor System (TPMS) operates
on a radio frequency and complies with Part 15 of
the FCC Rules. Operation is subject to the following
two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
The TPMS operates on a radio frequency and complies
with RSS-210 of Industry and Science Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
Tire Pressure Monitor Operation
The Tire Pressure Monitor System (TPMS) is designed
to warn the driver when a low tire pressure condition
exists. TPMS sensors are mounted onto each tire
and wheel assembly, excluding the spare tire and wheel
assembly. The TPMS sensors monitor the air pressure
in the vehicle’s tires and transmits the tire pressure
readings to a receiver located in the vehicle.
Using the Driver Information Center (DIC), the driver
can also check tire pressure levels using the DIC.
For additional information and details about the DIC
operation and displays seeDIC Operation and Displays
on page 3-48andDIC Warnings and Messages on
page 3-56.
When a low tire pressure
condition is detected, the
TPMS illuminates the
low tire pressure warning
light located on the
instrument panel cluster.
5-70

A DIC warning message to check the pressure in a
specic tire is also shown on the DIC display screen.
The low tire pressure warning light and the DIC warning
message come at each ignition cycle until the tires
are inated to the correct ination pressure.
The low tire pressure warning light may come on in
cool weather when the vehicle is rst started, and then
turn off as you start to drive. This could be an early
indicator that the air pressure in the tire(s) are getting
low and need to be inated to the proper pressure.
The Tire and Loading Information label, attached to
your vehicle, shows the size of your vehicle’s original
equipment tires and the correct ination pressure for the
tires when they are cold. SeeLoading the Vehicle on
page 4-22, for an example of the Tire and Loading
Information label and its location on your vehicle.
Also seeInflation - Tire Pressure on page 5-66.Your vehicle’s TPMS can warn you about a low tire
pressure condition but it does not replace normal
tire maintenance. SeeTire Inspection and Rotation
on page 5-74andTires on page 5-58.
Notice:Using non-approved tire sealants could
damage the Tire Pressure Monitor System (TPMS)
sensors. TPMS sensor damage caused by using
an incorrect tire sealant is not covered by the
vehicle warranty. Always use the GM approved
tire sealant available through your dealer/retailer.
Your vehicle, when new, may have included a
factory-installed Tire Sealant and Compressor Kit.
This kit uses a GM approved liquid tire sealant. See
Tire Sealant and Compressor Kit (With Sealant Selector
Switch) on page 5-84orTire Sealant and Compressor
Kit (Without Sealant Selector Switch) on page 5-93.
5-71

TPMS Malfunction Light and Message
The TPMS will not function properly if one or more of
the TPMS sensors are missing or inoperable. When the
system detects a malfunction, the low tire warning light
ashes for about one minute and then stays on for the
remainder of the ignition cycle. A DIC warning message
is also displayed. The low tire warning light and DIC
warning message come on at each ignition cycle until the
problem is corrected. Some of the conditions that can
cause the malfunction light and DIC message to come
on are:
One of the road tires has been replaced with the
spare tire. The spare tire does not have a TPMS
sensor. The DIC message should go off once you
re-install the road tire containing the TPMS sensor.
The TPMS sensor matching process was not
done or not completed successfully after rotating
the vehicle’s tires. The DIC message should go off
after successfully completing the sensor matching
process. See “TPMS Sensor Matching Process”
later in this section.
One or more TPMS sensors are missing or
damaged. The DIC message and the TPMS
malfunction light should go off when the TPMS
sensors are installed and the sensor matching
process is performed successfully. See your
dealer/retailer for service.
Replacement tires or wheels do not match your
vehicle’s original equipment tires or wheels. Tires
and wheels other than those recommended for your
vehicle could prevent the TPMS from functioning
properly. SeeBuying New Tires on page 5-76.
Operating electronic devices or being near facilities
using radio wave frequencies similar to the TPMS
could cause the TPMS sensors to malfunction.
If the TPMS is not functioning it cannot detect or
signal a low tire condition. See your dealer/retailer for
service if the TPMS malfunction light and DIC message
comes on and stays on.
5-72

A
Accessories and Modications............................ 5-4
Accessory Power Outlets.................................3-22
Adaptive Forward Lighting System.....................3-19
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-70
Additives, Fuel................................................. 5-8
Add-On Electrical Equipment...........................5-122
Air Cleaner/Filter, Engine.................................5-21
Air Conditioning..............................................3-24
Airbag
Passenger Status Indicator...........................3-35
Readiness Light..........................................3-34
Airbag System................................................1-56
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-70
How Does an Airbag Restrain?......................1-63
Passenger Sensing System...........................1-65
Servicing Your Airbag-Equipped Vehicle..........1-70
What Makes an Airbag Inate?......................1-63
What Will You See After an Airbag Inates?....1-64
When Should an Airbag Inate?....................1-61
Where Are the Airbags?...............................1-58
All-Wheel Drive...............................................5-50
All-Wheel-Drive (AWD) System........................... 4-9
Analog Clock..................................................3-23
Antenna, Backglass.......................................3-126Antenna, XM™ Satellite Radio
Antenna System........................................3-126
Antilock Brake System (ABS)............................. 4-5
Anti-lock Brake, System Warning Light...............3-39
Appearance Care
Aluminum or Chrome-Plated Wheels.............5-118
Care of Safety Belts...................................5-115
Chemical Paint Spotting..............................5-119
Cleaning Exterior Lamps/Lenses..................5-116
Fabric/Carpet............................................5-113
Finish Care...............................................5-116
Finish Damage..........................................5-119
Instrument Panel, Vinyl, and Other Plastic
Surfaces...............................................5-115
Interior Cleaning........................................5-112
Leather....................................................5-114
Sheet Metal Damage..................................5-119
Speaker Covers.........................................5-115
Tires........................................................5-118
Underbody Maintenance.............................5-119
Vehicle Care/Appearance Materials...............5-120
Washing Your Vehicle.................................5-116
Weatherstrips............................................5-115
Windshield and Wiper Blades......................5-117
Wood Panels............................................5-115
Appointments, Scheduling Service.....................7-10
Ashtray.........................................................3-23
1

Audio System.................................................3-82
Audio Steering Wheel Controls....................3-124
Backglass Antenna.....................................3-126
Navigation/Radio System, see Navigation
Manual.................................................3-111
Radio Reception........................................3-125
Theft-Deterrent Feature...............................3-124
XM™ Satellite Radio Antenna System...........3-126
Audio System(s).............................................3-83
Automatic Transmission
Fluid..........................................................5-25
Operation...................................................2-38
B
Backglass Antenna........................................3-126
Battery..........................................................5-44
Electric Power Management..........................3-21
Exterior Lighting Battery Saver......................3-20
Run-Down Protection...................................3-22
Bluetooth
®....................................................3-111
Brake
Emergencies................................................ 4-5
Brakes..........................................................5-41
Panic Assist................................................. 4-9
System Warning Light..................................3-38
Braking........................................................... 4-4
Braking in Emergencies..................................... 4-5
Break-In, New Vehicle.....................................2-32Bulb Replacement...........................................5-55
Front Turn Signal and Fog Lamps..................5-56
Halogen Bulbs............................................5-55
Headlamp Aiming........................................5-52
High Intensity Discharge (HID) Lighting...........5-55
License Plate Lamps....................................5-56
Replacement Bulbs......................................5-57
Buying New Tires...........................................5-76
C
Calibration.....................................................3-53
California Fuel.................................................. 5-7
California Perchlorate Materials Requirements....... 5-5
California Proposition 65 Warning....................... 5-5
Canadian Owners............................................... iii
Capacities and Specications..........................5-129
Carbon Monoxide...........................2-21, 2-48, 4-17
Care of
Safety Belts..............................................5-115
CD, MP3 .....................................................3-106
Center Console Storage Area...........................2-63
Chains, Tire...................................................5-82
Charging System Light....................................3-37
Check
Engine Light...............................................3-41
Checking Things Under the Hood......................5-12
Chemical Paint Spotting.................................5-119
2

Child Restraints
Child Restraint Systems...............................1-39
Infants and Young Children...........................1-35
Lower Anchors and Tethers for Children..........1-43
Older Children.............................................1-32
Securing a Child Restraint in a
Rear Seat Position...................................1-49
Securing a Child Restraint in the
Right Front Seat Position..........................1-52
Where to Put the Restraint...........................1-42
Cigarette Lighter.............................................3-23
Cleaning
Aluminum or Chrome-Plated Wheels.............5-118
Exterior Lamps/Lenses................................5-116
Fabric/Carpet............................................5-113
Finish Care...............................................5-116
Instrument Panel, Vinyl, and Other
Plastic Surfaces.....................................5-115
Interior.....................................................5-112
Leather....................................................5-114
Speaker Covers.........................................5-115
Tires........................................................5-118
Underbody Maintenance.............................5-119
Washing Your Vehicle.................................5-116
Weatherstrips............................................5-115
Windshield and Wiper Blades......................5-117
Wood Panels............................................5-115Climate Control System
Air Filter, Passenger Compartment.................3-29
Dual ..........................................................3-24
Outlet Adjustment........................................3-28
Clock............................................................3-23
Clutch, Hydraulic.............................................5-27
Collision Damage Repair..................................7-12
Compact Spare Tire......................................5-111
Compass.......................................................3-53
Competitive Driving.........................................4-14
Compressor Kit, Tire Sealant....................5-84, 5-93
Control of a Vehicle.......................................... 4-3
Convenience Net............................................2-63
Coolant
Engine.......................................................5-28
Engine Temperature Gage............................3-40
Engine Temperature Warning Light.................3-40
Surge Tank Pressure Cap.............................5-31
Cooling System..............................................5-34
Cruise Control................................................3-14
Cruise Control Light........................................3-46
Cupholders....................................................2-62
Customer Assistance Information
Courtesy Transportation................................7-11
Customer Assistance for
Text Telephone (TTY) Users........................ 7-6
Customer Assistance Offices........................... 7-6
3

Engine
Air Cleaner/Filter.........................................5-21
Check and Service Engine Soon Light............3-41
Coolant......................................................5-28
Coolant Heater............................................2-37
Coolant Temperature Gage...........................3-40
Coolant Temperature Warning Light................3-40
Cover........................................................5-21
Drive Belt Routing.......................................6-17
Engine Compartment Overview......................5-14
Exhaust.....................................................2-48
Oil .............................................................5-16
Oil Life System...........................................5-19
Oil Pressure Gage.......................................3-45
Overheated Protection Operating Mode...........5-33
Overheating................................................5-31
Speed Limiter.............................................3-32
Starting......................................................2-35
Entry Lighting.................................................3-20
Event Data Recorders.....................................7-19
Extender, Safety Belt.......................................1-32
Exterior Lighting Battery Saver..........................3-20
F
Filter
Engine Air Cleaner......................................5-21
Finish Damage.............................................5-119
Flashers, Hazard Warning.................................. 3-6Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-82
Flat Tire, Changing........................................5-102
Flat Tire, Storing...........................................5-110
Fluid.............................................................5-26
Automatic Transmission................................5-25
Power Steering...........................................5-39
Windshield Washer......................................5-40
Fog Lamp
Fog ...........................................................3-19
Fog Lamp Light..............................................3-46
Folding Rear Seat...........................................1-11
Fuel............................................................... 5-6
Additives...................................................... 5-8
California Fuel.............................................. 5-7
Filling a Portable Fuel Container....................5-11
Filling the Tank............................................. 5-9
Fuels in Foreign Countries.............................. 5-8
Gage .........................................................3-47
Gasoline Octane........................................... 5-7
Gasoline Specications.................................. 5-7
Running Out of...........................................2-49
Fuses
Fuses and Circuit Breakers.........................5-123
Rear Compartment Fuse Block....................5-126
Underhood Fuse Block...............................5-123
Windshield Wiper.......................................5-122
5

G
Gage
Engine Coolant Temperature.........................3-40
Engine Oil Pressure.....................................3-45
Fuel..........................................................3-47
Speedometer..............................................3-32
Tachometer.................................................3-32
Garage Door Opener.......................................2-58
Gasoline
Octane........................................................ 5-7
Specications............................................... 5-7
Glove Box.....................................................2-62
GM Mobility Reimbursement Program.................. 7-7
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-2
Headlamp
Aiming .......................................................5-52
Headlamps....................................................3-17
Adaptive Forward Lighting System.................3-19
Bulb Replacement.......................................5-55Headlamps (cont.)
Daytime Running Lamps...............................3-18
Flash-to-Pass............................................... 3-9
Front Turn Signal and Fog Lamps..................5-56
Halogen Bulbs............................................5-55
High Intensity Discharge (HID) Lighting...........5-55
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-17
Washer......................................................3-13
Wiper Activated...........................................3-17
Heated Seats................................................... 1-6
Heater...........................................................3-24
Engine Coolant...........................................2-37
Highbeam On Light.........................................3-47
High-Speed Operation, Tires.............................5-68
Highway Hypnosis...........................................4-16
Hill and Mountain Roads..................................4-16
Hood
Checking Things Under................................5-12
Release.....................................................5-12
Horn ............................................................... 3-6
How to Wear Safety Belts Properly...................1-17
Hydraulic Clutch.............................................5-27
6

I
Ignition Positions....................................2-32, 2-34
Immobilizer....................................................2-29
Immobilizer Operation..............................2-30, 2-31
Infants and Young Children, Restraints...............1-35
Ination - Tire Pressure...................................5-66
Inator Kit, Tire.......................................5-84, 5-93
Instrument Panel
Brightness..................................................3-20
Cluster.......................................................3-31
Overview..................................................... 3-4
Storage Area..............................................2-63
J
Jump Starting.................................................5-45
K
Keyless Access System..................................... 2-9
Keyless Access System, Operation....................2-10
Keyless Entry System....................................... 2-6
Keys............................................................... 2-4
L
Labeling, Tire Sidewall.....................................5-60
Lamps
Exterior Lighting Battery Saver......................3-20
Reading.....................................................3-21
Lap-Shoulder Belt...........................................1-26
LATCH System
Child Restraints...........................................1-43
License Plate Lamps.......................................5-56
Light
Airbag Readiness........................................3-34
Anti-lock Brake System (ABS) Warning...........3-39
Brake System Warning.................................3-38
Charging System.........................................3-37
Cruise Control.............................................3-46
Engine Coolant Temperature Warning.............3-40
Fog Lamp ..................................................3-46
Highbeam On.............................................3-47
Lights On Reminder.....................................3-46
Malfunction Indicator....................................3-41
Oil Pressure...............................................3-44
Passenger Airbag Status Indicator..................3-35
Safety Belt Reminders..................................3-33
Security.....................................................3-46
Tire Pressure..............................................3-41
Traction Control System (TCS)/StabiliTrak
®......3-39
Up-Shift.....................................................3-37
7