2007 CADILLAC CTS V maintenance

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

Change Engine Oil
This message indicates that the life of the engine
oil has expired and it should be changed and
that your vehicle is due for service. See your
dealer. SeeEngine Oil on page 346and
Scheduled Maintenance on page 462for 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, seeEngine Oil Life System on
page 349. If you clear this message from the
display, it will not re-appear.
Change Trans (Transmission) Fluid
(Automatic Transmission)
This message indicates that the life of the
transmission uid has expired and it should be
changed. SeeScheduled Maintenance on
page 462andRecommended Fluids and
Lubricants on page 473for the proper uid and
change intervals.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.
Check Brake Fluid
This message will display if the ignition is in ON to
inform the driver that the brake uid level is low.
Have the brake system serviced by your dealer as
soon as possible. SeeBrake System Warning
Light on page 205andBrakes on page 371
for more information.
Check Gas Cap
When this message appears on the display, the
gas cap has not been fully tightened. You
should recheck the gas cap to ensure that it is on
and tightened properly. See “If the Light Is On
Steady” underMalfunction Indicator Lamp
on page 209for more information.
235

Sheet Metal Damage................................. 442
Finish Damage.......................................... 442
Underbody Maintenance............................ 443
Chemical Paint Spotting............................ 443
Vehicle Care/Appearance Materials............ 444
Vehicle Identication.................................. 445
Vehicle Identication Number (VIN)........... 445
Service Parts Identication Label............... 445Electrical System........................................ 446
Add-On Electrical Equipment..................... 446
Windshield Wiper Fuses............................ 446
Power Windows and Other Power
Options.................................................. 446
Fuses and Circuit Breakers....................... 447
Underhood Fuse Block.............................. 447
Rear Underseat Fuse Block....................... 451
Capacities and Specications.................... 457
Section 5 Service and Appearance Care
331

California Proposition 65 Warning
Most motor vehicles, including this one, contain
and/or emit chemicals known to the State of
California to cause cancer and birth defects or other
reproductive harm. Engine exhaust, many parts and
systems (including some inside the vehicle), many
uids, and some component wear by-products
contain and/or emit these chemicals.
Doing Your Own Service Work
{CAUTION:
You can be injured and your vehicle could
be damaged if you try to do service work
on a vehicle without knowing enough
about it.
Be sure you have sufficient knowledge,
experience, the proper replacement
parts, and tools before you attempt any
vehicle maintenance task.
CAUTION: (Continued)
CAUTION: (Continued)

Be sure to use the proper nuts, bolts,
and other fasteners. English and
metric fasteners can be easily
confused. If you use the wrong
fasteners, parts can later break or fall
off. You could be hurt.
If you want to do some of your own service work,
you should use the proper service manual.
It tells you much more about how to service your
vehicle than this manual can. To order the
proper service manual, seeService Publications
Ordering Information on page 501.
Your vehicle has an airbag system. Before
attempting to do your own service work, see
Servicing Your Airbag-Equipped Vehicle on
page 88.
You should keep a record with all parts receipts
and list the mileage and the date of any service
work you perform. SeeMaintenance Record
on page 477.
333

Adding Equipment to the Outside of
Your Vehicle
Things you might add to the outside of your
vehicle can affect the airow around it. This may
cause wind noise and affect windshield washer
performance. Check with your dealer before
adding equipment to the outside of your vehicle.
Fuel
Use of the recommended fuel is an important part
of the proper maintenance of your vehicle. To
help keep the engine clean and maintain optimum
vehicle performance, GM recommends the use
of gasoline advertised as TOP TIER Detergent
Gasoline.
The 8th digit of the Vehicle Identication Number
(VIN) shows the code letter or number that
identies your vehicle’s engine. The VIN is at the
top left of the instrument panel. SeeVehicle
Identication Number (VIN) on page 445.
Gasoline Octane
If your vehicle has the 2.8L V6 engine (VIN
Code T), use regular unleaded gasoline with a
posted octane rating of 87 or higher. If the octane
rating is less than 87, you may notice an audible
knocking noise when you drive, commonly referred
to as spark knock. If this occurs, use a gasoline
rated at 87 octane or higher as soon as possible.
If you are using gasoline rated at 87 octane or
higher and you hear heavy knocking, your engine
needs service.
If your vehicle has the 3.6L V6 engine (VIN
Code 7), use regular unleaded gasoline with a
posted octane rating of 87 or higher. For best
performance or trailer towing, you may choose to
use middle grade 89 octane unleaded gasoline.
If the octane rating is less than 87, you may notice
an audible knocking noise when you drive,
commonly referred to as spark knock. If this occurs,
use a gasoline rated at 87 octane or higher as soon
as possible. If you are using gasoline rated at
87 octane or higher and you hear heavy knocking,
your engine needs service.
334

When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/lter at the MaintenanceII
intervals and replace it at the rst oil change
after each 50,000 mile (83 000 km) interval. See
Scheduled Maintenance on page 462for more
information. If you are driving in dusty/dirty
conditions, inspect the lter at each engine oil
change.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/lter, remove the lter
from the vehicle and lightly shake the lter to
release loose dust and dirt. If the lter remains
caked with dirt, a new lter is required.
To inspect or replace the engine air cleaner/lter,
do the following:
1. Remove the two screws located on the sides
of the cover.
2. Lift the cover off.3. Inspect or replace the engine air cleaner/lter.
SeeNormal Maintenance Replacement Parts
on page 475for the correct part number
for the lter.
4. Reinstall the cover by reversing Steps 1 and 2.
{CAUTION:
Operating the engine with the air
cleaner/lter off can cause you or others
to be burned. The air cleaner not only
cleans the air; it helps to stop ames if
the engine backres. If it is not there and
the engine backres, you could be
burned. Do not drive with it off, and be
careful working on the engine with the air
cleaner/lter off.
Notice:If the air cleaner/lter is off, a backre
can cause a damaging engine re. And, dirt
can easily get into your engine, which will
damage it. Always have the air cleaner/lter in
place when you are driving.
352

Hydraulic Clutch
It is not necessary to regularly check clutch uid
unless you suspect there is a leak in the system.
Adding uid will not correct a leak.
A uid loss in this system could indicate a
problem. Have the system inspected and repaired.
When to Check and What to Use
The hydraulic clutch
uid reservoir cap has
this symbol on it.
SeeEngine
Compartment Overview
on page 342for
reservoir location.
Refer to the Maintenance Schedule to determine
how often you should check the uid level in
your clutch master cylinder reservoir and for the
proper uid to use. SeeOwner Checks and
Services on page 469andRecommended Fluids
and Lubricants on page 473.
How to Check and Add Fluid
Make sure the uid level is at the MIN (Minimum)
line on the side of the reservoir. If it is not,
remove the cap and add the proper uid until the
level reaches the MIN line.
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is
designed to remain in your vehicle for ve years or
150,000 miles (240 000 km), whichever occurs
rst, if you add only DEX-COOL
®extended
life coolant.
The following explains your cooling system and
how to add coolant when it is low. If you have
a problem with engine overheating, seeEngine
Overheating on page 360.
356