2003 CADILLAC CTS mileage

2-83
Speedometer and Odometer
The speedometer lets you see your speed in both miles
per hour (mph) and kilometers per hour (km/h). The
odometer shows how far your vehicle has been driven,
in either miles (used in the United States) or kilometers
(used in Canada).
You may wonder what happens if a vehicle has to have a
new odometer installed. The new one may read the
correct mileage. This is because your vehicle's computer
has stored the mileage in memory.
Trip Odometer
The trip odometer can record the number of miles or
kilometers traveled for up to two trips.
The trip odometer is part of the Driver Information
Center (DIC). To access the trip odometer, use one of
the following procedures:
Using the base audio system, do the following:
1. Press the INFO (Information) button located to the
right of the screen to access the DIC menu.
2. Scroll through the menu using the up or down arrows
on the INFO button until you reach Trip Odometer A
or Trip Odometer B.
The selected trip odometer (A or B) will be
displayed at the top of the screen with the
accumulated mileage.3. Repeat the steps to view the other trip odometer.
You can reset the selected trip odometer by pressing
CLR (Clear) located in the center of the INFO button to
the right of the screen. The mileage for that trip
odometer will return to zero. Each trip odometer must
be reset individually.
Using the Navigation audio system, do the following:
1. Press the INFO button located on the left side of the
screen to access the Vehicle Information menu.
2. Scroll through the menu using the TUNE/SEL knob
located to the lower right of the screen until you
reach Trip Odometer A or Trip Odometer B.
3. Select the menu item by pressing the TUNE/SEL
knob once.
The selected trip odometer (A or B) will be
displayed at the top of the screen with the
accumulated mileage.
4. Repeat the steps to view the other trip odometer.
You can reset the selected trip odometer by pressing
multi
-function button next to Reset in the upper right
corner of the screen. The mileage for that trip odometer
will return to zero. Each trip odometer must be reset
individually.

2-105
Battery Voltage/BATTERY VOLTS: If you select this
item, the current battery voltage is displayed. If the
voltage is in the normal range, the display will have OK
after it. For example, the display may read 13.2 Battery
Volts OK.
If there is a problem with the battery charging system,
there are four possible DIC messages that may be
displayed. See ªDriver Information Center (DIC)
Messagesº later in this section for more information.
Engine Oil Life/ENGINE OIL LIFE: If you select
this item, the percentage of remaining oil life is
displayed. If you see 99% Oil Life on the display, that
means that 99% of the current oil life remains.
When the oil life is depleted, the Change Engine Oil
message will appear on the display. You should change
the engine oil as soon as possible within 200 miles. Be
sure to keep a written record of the mileage and date of
the oil change so you will have it for future reference.
When you reset the Change Engine Oil message by
clearing it from the display, you still must reset the
engine oil life monitor separately. For more information
on resetting the engine oil life monitor, see ªOil Life
Monitor, How to Resetº in the Index.The engine oil life monitor does not check the amount
of oil your vehicle has, so you should check the oil level
periodically. See ªEngine Oilº in the Index for more
information.
Transmission Fluid Life/TRANS FLUID LIFE
(Automatic Transmission Only): If you select this
item, the percentage of remaining transmission fluid life
is displayed. If you see 99% Trans Fluid Life on the
display, that means that 99% of the current transmission
fluid life remains.
When the transmission fluid life is depleted, the Change
Transmission Fluid message will appear on the display.
You should change the engine oil as soon as possible
within 200 miles. Be sure to keep a written record of the
mileage and date of the oil change so you will have it
for future reference.
When you reset the Change Transmission Fluid message
by clearing it from the display, you still must reset the
transmission fluid life monitor separately. For more
information on resetting the engine oil life monitor, see
ªTransmission Fluid Life Monitor, How to Resetº in
the Index.

6-2
Service
Your dealer knows your vehicle best and wants you to
be happy with it. We hope you'll go to your dealer for
all your service needs. You'll get genuine GM parts and
GM
-trained and supported service people.
We hope you'll want to keep your GM vehicle all GM.
Genuine GM parts have one of these marks:
Doing Your Own Service Work
If you want to do some of your own service work, you'll
want to 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, see ªService
and Owner Publicationsº in the Index.
Your vehicle has an air bag system. Before attempting to
do your own service work, see ªServicing Your Air
Bag
-Equipped Vehicleº in the Index.
You should keep a record with all parts receipts and list
the mileage and the date of any service work you
perform. See ªMaintenance Recordº in the Index.

6-14
NOTICE:
Use only engine oil with the American Petroleum
Institute Certified For Gasoline Engines
starburst symbol. Failure to use the
recommended oil can result in engine damage not
covered by your warranty.
GM Goodwrench
oil meets all the requirements for
your vehicle.
If you are in an area where the temperature falls below
-20F (-29C), consider using either an SAE 5W-30
synthetic oil or an SAE 0W
-30 oil. Both will provide
easier cold starting and better protection for your engine
at extremely low temperatures.
Engine Oil Additives
Don't add anything to your oil. The recommended oils
with the starburst symbol are all you will need for good
performance and engine protection.
When to Change Engine Oil
(GM Oil Life System)
Your vehicle has a computer system that lets you know
when to change the engine oil and filter. This is based
on engine revolutions and engine temperature, and not
on mileage. Based on driving conditions, the mileage
at which an oil change will be indicated can vary
considerably. For the oil life system to work properly,
you must reset the system every time the oil is changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A Change Engine Oil message in the DIC
will come on. Change your oil as soon as possible
within the next two times you stop for fuel. It is possible
that, if you are driving under the best conditions, the oil
life system may not indicate that an oil change is
necessary for over a year. However, your engine oil and
filter must be changed at least once a year and at this
time the system must be reset. It is also important to
check your oil regularly and keep it at the proper level.
If the system is ever reset accidentally, you must change
your oil at 3,000 miles (5 000 km) since your last oil
change. Remember to reset the oil life system whenever
the oil is changed.

Scheduled Maintenance
7-6Engine Oil Scheduled Maintenance
Change engine oil and filter as indicated by the
GM Oil Life System
(or every 12 months,
whichever occurs first). Reset the system.
Your vehicle has a computer system that lets you know
when to change the engine oil and filter. This is based on
engine revolutions and engine temperature, and not on
mileage. Based on driving conditions, the mileage at
which an oil change will be indicated can vary
considerably. For the oil life system to work properly,
you must reset the system every time the oil is changed.When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A Change Engine Oil message in the Driver
Information Center (DIC) will come on. Change your oil
as soon as possible within the next two times you stop
for fuel. It is possible that, if you are driving under the
best conditions, the oil life system may not indicate that
an oil change is necessary for over a year. However,
your engine oil and filter must be changed at least once
a year and at this time the system must be reset. It is also
important to check your oil regularly and keep it at the
proper level.
If the system is ever reset accidentally, you must change
your oil at 3,000 miles (5 000 km) since your last oil
change. Remember to reset the oil life system whenever
the oil is changed. See ªOil Life Systemº in the Index
for information on resetting the system.
An Emission Control Service.

Scheduled Maintenance
7-9
7,500 Miles (12 500 km)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
15,000 Miles (25 000 km)
Inspect engine air cleaner filter if you are driving in dusty conditions.
Replace filter if necessary.
An Emission Control Service. (See footnote
.)
Replace passenger compartment air filter. If you drive regularly under dusty
conditions, the filter may require replacement more often.
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
22,500 Miles (37 500 km)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE

Scheduled Maintenance
7-10
30,000 Miles (50 000 km)
Replace passenger compartment air filter. If you drive regularly under dusty
conditions, the filter may require replacement more often.
Check axle fluid level and add fluid as needed. (See footnote **.)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
Replace engine air cleaner filter.
An Emission Control Service.
37,500 Miles (62 500 km)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
45,000 Miles (75 000 km)
Inspect engine air cleaner filter if you are driving in dusty conditions.
Replace filter if necessary.
An Emission Control Service. (See footnote
.)
Replace passenger compartment air filter. If you drive regularly under dusty
conditions, the filter may require replacement more often.
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE

Scheduled Maintenance
7-11
50,000 Miles (83 000 km)
Change automatic transmission fluid and filter if the vehicle is mainly driven
under one or more of these conditions:
± In heavy city traffic where the outside temperature regularly reaches
90
F (32
C) or higher.
± In hilly or mountainous terrain.
± When doing frequent trailer towing.
± Uses such as high performance operation.
If you do not use your vehicle under any of these conditions, the fluid and
filter do not require changing.
52,500 Miles (87 500 km)
Rotate tires. See ªTire Inspection and Rotationº in the Index for proper
rotation pattern and additional information. (See footnote +.)
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE