maintenance CADILLAC CTS 2007 1.G Owners Manual

Service and Appearance Care
.................. 329
Service
................................................. 332
Fuel
...................................................... 334
Checking Things Under
the Hood
........................................... 340
Rear Axle
............................................. 382
Headlamp Aiming
................................. 383
Bulb Replacement
................................ 386
Windshield Wiper Blade
Replacement
..................................... 390
Tires
..................................................... 392
Appearance Care
.................................. 435Vehicle Identication
............................. 445
Electrical System
.................................. 446
Capacities and Specications
................ 457
Maintenance Schedule
.............................. 459
Maintenance Schedule
.......................... 460
Customer Assistance Information
............. 481
Customer Assistance and Information
... 482
Reporting Safety Defects
...................... 500
Index
.......................................................... 503
2

Servicing Your Airbag-Equipped
Vehicle
Airbags affect how your vehicle should be
serviced. There are parts of the airbag system in
several places around your vehicle. You do
not want the system to inate while someone is
working on your vehicle. Your dealer and the
service manual have information about servicing
your vehicle and the airbag system. To purchase
a service manual, seeService Publications
Ordering Information on page 501.
{CAUTION:
For up to 10 seconds, after the ignition is
turned off and the battery is disconnected,
an airbag can still inate during improper
service. You can be injured if you are
close to an airbag when it inates. Avoid
yellow connectors. They are probably part
of the airbag system. Be sure to follow
proper service procedures, and make sure
the person performing work for you is
qualied to do so.
The airbag system does not need regular
maintenance.
88

Restraint System Check
Checking the Restraint Systems
Now and then, make sure the safety belt reminder
light and all your belts, buckles, latch plates,
retractors and anchorages are working properly.
Look for any other loose or damaged safety
belt system parts. If you see anything that might
keep a safety belt system from doing its job,
have it repaired. Keep safety belts clean and dry.
SeeCare of Safety Belts on page 439for more
information.
Torn or frayed safety belts may not protect you
in a crash. They can rip apart under impact
forces. If a belt is torn or frayed, get a new one
right away.Also look for any opened or broken airbag covers,
and have them repaired or replaced. The airbag
system does not need regular maintenance.
Notice:If you damage the covering for the
driver’s or the right front passenger’s airbag,
or the airbag covering on the driver’s and
right front passenger’s seatback, or the side
impact airbag covering on the ceiling near the
side windows, the bag may not work properly.
You may have to replace the airbag module
in the steering wheel, both the airbag module
and the instrument panel for the right front
passenger’s airbag, the airbag module
and seatback for the driver’s and right front
passenger’s seat-mounted side impact airbags,
or side impact airbag module and ceiling
covering for the roof-mounted side impact
airbag. Do not open or break the airbag
coverings.
90

If the airow seems low when the fan speed is at
the highest setting, the passenger compartment air
lter may need to be replaced. For more
information, seePassenger Compartment Air Filter
on page 195andScheduled Maintenance on
page 462.
h(Recirculation):This mode keeps outside
air from coming in the vehicle. It can be used
to prevent outside air and odors from entering your
vehicle or to help heat or cool the air inside your
vehicle more quickly. Press this button to
switch between recirculation and fresh air. Press
the auto button to have the system select the best
air delivery mode for your temperature setting.
Recirculation is not available in the defrost mode
and will automatically turn off after 10 minutes
when defog is selected.
Using recirculation for long periods of time may
cause the air inside your vehicle to become too dry
or stuffy. To prevent this from happening, after
the air in your vehicle has cooled, turn the
recirculation mode off or press the auto button.
((Heated Seats):Press this button to turn on
the heated seats. The button on the left controls
the driver’s seat and the button on the right
controls the passenger’s seat. SeeHeated Seats
on page 10.
QPWRR(Power/Driver’s Temperature):Press
the PWR button located on the driver’s side of
the climate control panel to turn the entire climate
control system on or off. Press the up or down
arrow on the switch to increase or decrease
the automatic temperature setting.
QPWRR(Power/Passenger’s Temperature):
Press the PWR button located on the passenger’s
side of the climate control panel to allow the
passenger’s climate control setting to be different
than the driver’s. Press the up or down arrow on the
switch to increase or decrease the automatic
temperature setting for the front passenger.
A/C OFF (Air Conditioning):Press this button to
manually turn off the air conditioning compressor.
Press AUTO to return to automatic operation
or press the A/C OFF button again.
191

Operation Tips

Clear away any ice, snow or leaves from the
air inlets at the base of the windshield that
may block the ow of air into your vehicle.
Use of non-GM approved hood deectors may
adversely affect the performance of the
system.
Keep the path under the front seats clear of
objects to help circulate the air inside of
your vehicle more effectively.
Passenger Compartment Air Filter
The passenger compartment air lter traps most of
the pollen from the air entering your vehicle.
Like your vehicle’s engine air cleaner/lter, it needs
to be changed periodically. SeeScheduled
Maintenance on page 462.
Using the climate control system without the
passenger air lter installed may allow water or
other debris to enter the system. This could cause
a water leak or noises. Make sure to install a
new air lter after removing the old one.The passenger compartment air lter is located
underneath the hood below the windshield
wiper arm on the passenger’s side of the vehicle.
SeeEngine Compartment Overview on page 342
for more information on location.
Use the procedure listed below to replace the
passenger compartment air lter:
1. Turn the ignition to ON with the engine off.
2. Turn on the windshield wipers and turn them
off again when the wipers are straight on the
windshield.
This allows you access to the leaf screen.
The passenger compartment air lter is
located under the leaf screen.
195

3. Open the hood to access the engine
compartment. SeeHood Release on page 341
for more information.
4. Remove the four screws that hold the leaf
screen in place and lift off the screen by
lifting and sliding toward the center of
the vehicle.
5. Pull out on the two tabs located on each end
of the lter cover.
6. Lift the lter cover off by pulling it straight
upward.
7. Remove the old lter and insert a new one.
Make sure the arrow on the lter is pointing
toward the passenger compartment.
SeeNormal Maintenance Replacement Parts
on page 475for the correct part number
for the lter.
8. Reverse Steps 1 through 6 to reinstall
the cover.Steering Wheel Climate
Controls (CTS)
Your vehicle may have four controls that can be
programmed for use with the climate control
system.
The controls are located
on the left side of the
steering wheel.
SeeRecongurable Steering Wheel Controls
(SWC) (CTS) on page 169for more information on
programming these controls.
196

Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which
monitors operation of
the fuel, ignition,
and emission control
systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended
to assure that emissions are at acceptable
levels for the life of the vehicle, helping to produce
a cleaner environment. The check engine light
comes on to indicate that there is a problem and
service is required. Malfunctions often will be
indicated by the system before any problem is
apparent. This may prevent more serious damage
to your vehicle. This system is also designed to
assist your service technician in correctly
diagnosing any malfunction.Notice:If you keep driving your vehicle with
this light on, after awhile, the emission controls
might not work as well, your vehicle’s fuel
economy might not be as good, and the engine
might not run as smoothly. This could lead
to costly repairs that might not be covered by
your warranty.
Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system
of your vehicle or the replacement of the
original tires with other than those of the same
Tire Performance Criteria (TPC) can affect
your vehicle’s emission controls and can cause
this light to come on. Modications to these
systems could lead to costly repairs not
covered by your warranty. This could also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 332.
209

Did you just drive through a deep puddle of water?
If so, your electrical system may be wet. The
condition will usually be corrected when the
electrical system dries out. A few driving trips
should turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
SeeGasoline Octane on page 334. Poor fuel
quality will cause your engine not to run as
efficiently as designed. You may notice this as
stalling after start-up, stalling when you put
the vehicle into gear, misring, hesitation on
acceleration, or stumbling on acceleration. (These
conditions may go away once the engine is
warmed up.) This will be detected by the system
and cause the light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at
least one full tank of the proper fuel to turn the
light off.
If none of the above steps have made the light
turn off, your dealer can check the vehicle.
Your dealer has the proper test equipment and
diagnostic tools to x any mechanical or electrical
problems that may have developed.Emissions Inspection and Maintenance
Programs
Some state/provincial and local governments have
or may begin programs to inspect the emission
control equipment on your vehicle. Failure to pass
this inspection could prevent you from getting a
vehicle registration.
Here are some things you need to know to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
check engine light is on or not working properly.
Your vehicle will not pass this inspection if
the OBD (on-board diagnostic) system determines
that critical emission control systems have not
been completely diagnosed by the system.
The vehicle would be considered not ready for
inspection. This can happen if you have recently
replaced your battery or if your battery has
run down. The diagnostic system is designed to
evaluate critical emission control systems
during normal driving. This may take several days
of routine driving. If you have done this and
your vehicle still does not pass the inspection for
lack of OBD system readiness, your dealer
can prepare the vehicle for inspection.
211

Oil Pressure Light
{CAUTION:
Do not keep driving if the oil pressure is
low. If you do, your engine can become so
hot that it catches re. You or others could
be burned. Check your oil as soon as
possible and have your vehicle serviced.
Notice:Lack of proper engine oil maintenance
may damage the engine. The repairs would
not be covered by your warranty. Always follow
the maintenance schedule in this manual for
changing engine oil.If your vehicle has this
light, it will come on
when there is a problem
with your engine oil
pressure.
This light will come on when you turn your key to
ON or START. It goes off once you start the
engine. That is a check to be sure the light works.
If it does not come on, be sure to have it xed
so it will be there to warn you if there is a problem.
When the light comes on and stays on, it means
that oil is not owing through your engine properly.
You could be low on oil and you might have
some other system problem. SeeEngine Oil on
page 346for more information.
212

When the oil life is depleted, the Change Engine
Oil message will appear on the display. See
your dealer for service. In addition to the engine
oil life system monitoring the oil life, additional
maintenance is recommended in the Maintenance
Schedule in this manual. SeeScheduled
Maintenance on page 462andEngine Oil on
page 346for more information.
When you reset the Change Engine Oil message
by clearing it from the display, you still must reset
the engine oil life system separately. For more
information on resetting the engine oil life system,
see “How to Reset the Engine Oil Life System
and the Oil Life Indicator” underEngine Oil
Life System on page 349. If you clear the Change
Engine Oil message from the display, it will not
re-appear.
TRANS FLUID LIFE (Automatic Transmission):
If you select this item, the percentage of
remaining transmission uid life is displayed.
If you see 99% TRANS FLUID LIFE on the display,
that means that 99% of the current transmission
uid life remains.When the transmission uid life is depleted, the
Change Trans Fluid message will appear on
the display. You should change the transmission
uid as soon as possible. Be sure to keep a written
record of the mileage and date of the uid
change so you will have it for future reference.
SeeScheduled Maintenance on page 462
andRecommended Fluids and Lubricants on
page 473for more information.
When you reset the Change Trans Fluid message
by clearing it from the display, you still must
reset the transmission uid life monitor separately.
For more information on resetting the transmission
uid life monitor, seeAutomatic Transmission
Fluid on page 353.
LF TIRE:If you select this item, the driver’s side
front tire pressure will be displayed. If the tire
pressure is low, LOW will be displayed with this
item. The pressure can be displayed in pounds per
square inch (PSI) or kilopascals (KPA). To change
the units, seeDIC Main Menu on page 228
DIC Main Menu.
227