check engine CADILLAC CTS 2008 2.G Workshop Manual

Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure vehicle safety,
dependability, and emission control performance. Your
dealer/retailer can assist with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to the
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-14.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel fill.
Engine Oil Level Check
Notice:It is important to check the engine oil
regularly and keep it at the proper level. Failure to
keep the engine oil at the proper level can cause
damage to the engine not covered by the vehicle
warranty.
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-16.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-28.
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
Inspect the vehicle’s tires and make sure they are
inated to the correct pressures. Do not forget to
check the spare tire. SeeInflation - Tire Pressure on
page 5-66. Check to make sure the spare tire is stored
securely. SeeChanging a Flat Tire on page 5-102.
Tire Wear Inspection
Tire rotation 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 5-74.
6-10

At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-44.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.3. On automatic transmission vehicles, try to start
the engine in each gear. The vehicle should start
only in PARK (P) or NEUTRAL (N). If the vehicle
starts in any other position, contact your
dealer/retailer for service.
On manual transmission vehicles, put the shift lever
in NEUTRAL, push the clutch pedal down halfway,
and try to start the engine. The vehicle should start
only when the clutch pedal is pushed down all the
way to the oor. If the vehicle starts when the clutch
pedal is not pushed all the way down, contact your
dealer/retailer for service.
6-11

Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
2. Firmly apply the parking brake. SeeParking Brake
on page 2-44.
Be ready to apply the regular brake immediately if
the vehicle begins to move.
3. With the engine off, turn the ignition to ON/RUN,
but do not start the engine. Without applying the
regular brake, try to move the shift lever out
of PARK (P) with normal effort. If the shift lever
moves out of PARK (P), contact your dealer/retailer
for service.
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition to LOCK/OFF in each shift lever position.
With an automatic transmission, the ignition
should turn to LOCK/OFF only when the shift lever
is in PARK (P).
With the key access ignition system, the ignition
key should come out only in LOCK/OFF. With
keyless access ignition, the ignition key does not
come out. SeeIgnition Positions (Key Access)
on page 2-32orIgnition Positions (Keyless Access)
on page 2-34.
Contact your dealer/retailer if service is required.
6-12

Parking Brake and Automatic
Transmission Park (P) Mechanism
Check
{CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake,
set the parking brake.
To check the parking brake’s holding ability:
With the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure from
the regular brake pedal. Do this until the vehicle is
held by the parking brake only.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift to PARK (P). Then
release the parking brake followed by the regular
brake.
Contact your dealer/retailer if service is required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
Tire Sealant and Compressor Kit
Check the sealant expiration date printed on the
instruction label of the Tire Sealant and Compressor
Kit (if equipped) at least once a year. See your
dealer/retailer for a replacement canister.
6-13

Current and Past Model Order Forms
Technical Service Bulletins and Manuals are available
for current and past model GM vehicles. To request
an order form, specify year and model name of
the vehicle.
ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM - 6:00 PM
Eastern Time
For Credit Card Orders Only
(VISA-MasterCard-Discover), visit Helm, Inc. on
the World Wide Web at: helminc.com
Or you can write to:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
Prices are subject to change without notice and without
incurring obligation. Allow ample time for delivery.
Note to Canadian Customers: All listed prices are
quoted in U.S. funds. Canadian residents are to make
checks payable in U.S. funds.
Vehicle Data Recording and
Privacy
Your GM vehicle has a number of sophisticated
computers that record information about the vehicle’s
performance and how it is driven. For example,
your vehicle uses computer modules to monitor and
control engine and transmission performance, to monitor
the conditions for airbag deployment and deploy
airbags in a crash and, if so equipped, to provide
antilock braking to help the driver control the vehicle.
These modules may store data to help your
dealer/retailer technician service your vehicle.
Some modules may also store data about how you
operate the vehicle, such as rate of fuel consumption
or average speed. These modules may also retain
the owner’s personal preferences, such as radio
pre-sets, seat positions, and temperature settings.
7-18

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

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

N
Navigation System, Privacy..............................7-20
Navigation/Radio System,
see Navigation Manual...............................3-111
New Vehicle Break-In......................................2-32
O
Odometer......................................................3-32
Odometers, Trip..............................................3-32
Off-Road Recovery..........................................4-12
Oil
Engine.......................................................5-16
Engine Oil Pressure Gage............................3-45
Pressure Light.............................................3-44
Oil, Engine Oil Life System..............................5-19
Older Children, Restraints................................1-32
Online Owner Center........................................ 7-5
OnStar, Privacy..............................................7-20
OnStar
®System, see OnStar®Manual...............2-55
Operation, Universal Home Remote System........2-58
Outlet Adjustment............................................3-28
Outlets
Accessory Power.........................................3-22
Outside
Convex Mirror.............................................2-51
Heated Mirrors............................................2-51
Power Mirrors.............................................2-50Overheated Engine Protection Operating Mode . . . 5-33
Owner Checks and Services.............................6-10
Owners, Canadian.............................................. iii
P
Paint, Damage..............................................5-119
Panic Brake Assist............................................ 4-9
Parade Dimming.............................................3-20
Park
Shifting Into................................................2-45
Shifting Out of............................................2-47
Park Aid........................................................2-52
Park Brake....................................................2-44
Park Tilt Mirrors..............................................2-51
Parking
Assist........................................................2-52
Over Things That Burn.................................2-48
Parking Your Vehicle.......................................2-47
Passenger Airbag Status Indicator.....................3-35
Passenger Compartment Air Filter.....................3-29
Passenger Sensing System..............................1-65
Passing.........................................................4-12
Perchlorate Materials Requirements, California...... 5-5
Phone
Bluetooth
®................................................3-111
Power
Door Locks.................................................2-19
Electrical System.......................................5-122
9

Power (cont.)
Lumbar Controls........................................... 1-6
Retained Accessory (RAP)............................2-35
Seat ............................................................ 1-5
Steering Fluid.............................................5-39
Tilt Wheel and Telescopic Steering Column....... 3-7
Windows....................................................2-25
Privacy..........................................................7-18
Event Data Recorders..................................7-19
Navigation System.......................................7-20
OnStar .......................................................7-20
Radio Frequency Identication.......................7-20
Programmable Automatic Door Locks.................2-20
R
Radio Frequency Identication (RFID), Privacy....7-20
Radio(s)........................................................3-83
Radios
Navigation/Radio System,
see Navigation Manual............................3-111
Reception.................................................3-125
Theft-Deterrent..........................................3-124
Rainsense™ Wipers........................................3-10
Reading Lamps..............................................3-21
Rear Axle......................................................5-51
Limited-Slip.................................................. 4-7
Rear Door Security Locks................................2-20Rearview Mirror, Automatic Dimming with
OnStar
®.....................................................2-50
Reclining Seatbacks.......................................... 1-8
Recommended Fluids and Lubricants.................6-14
Recreational Vehicle Towing.............................4-28
Remote, Keyless Access System........................ 2-9
Remote Keyless Entry (RKE) System.................. 2-6
Remote Keyless Entry (RKE) System, Operation . . . 2-7
Remote Vehicle Start.......................................2-16
Removing the Flat Tire and Installing the
Spare Tire................................................5-105
Removing the Spare Tire and Tools.................5-104
Replacement Bulbs.........................................5-57
Replacement Parts, Maintenance......................6-16
Reporting Safety Defects
Canadian Government..................................7-17
General Motors...........................................7-17
United States Government............................7-16
Restraint System Check
Checking the Restraint Systems....................1-72
Replacing Restraint System Parts
After a Crash..........................................1-73
Retained Accessory Power (RAP)......................2-35
Roadside
Service........................................................ 7-7
Rocking Your Vehicle to Get it Out....................4-22
Routing, Engine Drive Belt...............................6-17
Running Out of Fuel........................................2-49
10