2005 CADILLAC CTS oil change

Speedometer Display
This display will show information relating to vehicle
speed, odometer, and transmission status. The
information displayed can be changed by pressing (C).
Pressing this button cycles the displayed information
as follows: digital speedometer only, odometer
only, speedometer and odometer, or blank display.
When the transmission is shifted into REVERSE (R), an
R will appear in the upper right corner.
During slow speed maneuvers, the engine’s computer
may command the transmission to engage the Skip Shift
feature. For more information seeManual Transmission
Operation on page 2-31.
Tachometer Display
Press (B) to cycle through the following displays:
coolant temperature, oil pressure, oil temperature,
transmission temperature, tire pressure, and lateral
acceleration. Press (A) to cycle through the displays in
reverse order. If you press (A) for about one second
the display will become blank.
Coolant Temperature
When the coolant
temperature is displayed
you will see the coolant
temperature symbol.
The temperature will be displayed in degrees Fahrenheit
or Celsius and there will be a graph at the bottom of
the display. If the graph shows the temperature in
the shaded area all the way on the right, then the
coolant temperature is hot. SeeEngine Overheating on
page 5-28for more information.
3-52

Vehicle Information Menu
To access this menu, press the up or down arrow on
the INFO switch located to the right of the display.
The following items are available:
BLANK LINE
OUTSIDE TEMP
MI TRIP A*
MI TRIP B*
MILES RANGE
MPG AVG*
MPG INST
GAL FUEL USED*
AVG MPH*
TIMER*
BATTERY VOLTS
ENGINE OIL LIFE*
TRANS FLUID LIFE*
(Automatic Transmission Only)
* These items can be reset. Each one must be reset
individually. For a detailed description of the menu items
and how to reset them, see “Vehicle Information
Menu Item Descriptions” following.
You can view any of these items at any time, but only
one item can be displayed at a time.
Vehicle Information Menu Item
Descriptions
The following paragraphs contain a more detailed
description of each menu item:
BLANK LINE:If you select this item, nothing is
displayed at the top of the screen.
OUTSIDE TEMP:If you select this item, the current
outside temperature is displayed at the top of the
screen. It will be in either degrees Fahrenheit or degrees
Celsius depending upon whether the system is set for
English or metric units. If you wish to change the
units, seeDIC Main Menu on page 3-62.
MI TRIP A and B:For information on the trip
odometers, seeTrip Odometers on page 3-37.
MPG AVG:If you select this item, the approximate
average miles per gallon (mpg) or liters per
100 kilometers (L/100 km) is displayed. This number is
calculated based on the number of mpg (L/100 km)
recorded since the last time this menu item was reset.
To reset the MPG AVG, press the CLR button located to
the right of the screen. The display will return to zero.
3-59

If there is a problem with the battery charging system,
there are four possible DIC messages that may be
displayed. SeeDIC Warnings and Messages on
page 3-65for more information.
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. In addition to
the engine oil life system monitoring the oil life,
additional maintenance is recommended in the
Maintenance Schedule in this manual. SeeEngine Oil
on page 5-16andScheduled Maintenance on page 6-4
for 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 5-19.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
Transmission Fluid message will appear on the
display. You should change the transmission uid as
soon as possible within 200 miles (322 km). Be sure to
keep a written record of the mileage and date of the
uid 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 uid life monitor separately.
For more information on resetting the transmission uid
life monitor, seeAutomatic Transmission Fluid on
page 5-22.
3-61

Buckle Passenger
This message reminds you to buckle the passenger’s
seat belt.
This message will display and a chime will sound when
the ignition is on, the driver’s seat belt is buckled, the
passenger’s seat belt is unbuckled with the passenger
airbag enabled and the vehicle is in motion. You should
have the passenger buckle their seat belt.
The reminder will be repeated if the ignition is on, the
vehicle is in motion, the driver is unbuckled and the
passenger is still unbuckled and the passenger airbag is
enabled. If the passenger’s seat belt is already
buckled, this message and chime will not come on.
Buckle Seat Belt
This message reminds you to buckle the driver’s
seat belt.
This message will display and a chime will sound when
the ignition is on, the driver’s seat belt is unbuckled
and the vehicle is in motion. You should buckle
your seat belt.If the driver remains unbuckled when the ignition is on
and the vehicle is in motion, the reminder will be
repeated. If the driver’s seat belt is already buckled, this
message and chime will not come on.
This message is an additional reminder to the Safety
Belt Reminder Light in the instrument panel cluster. See
Safety Belt Reminder Light on page 3-38for more
information.
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. SeeEngine Oil on
page 5-16andScheduled Maintenance on page 6-4for
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 5-19.
3-67

Your vehicle’s engine is lled at the factory with a
Mobil 1®synthetic oil, which meets all requirements
for your vehicle.
Substitute Engine Oil: When adding oil to maintain
engine oil level, oil meeting GM Standard GM4718M
may not be available. You can add substitute oil
designated SAE 5W-30 with the starburst symbol at all
temperatures. Substitute oil not meeting GM Standard
GM4718M should not be used for an oil change.
Engine Oil Additives
Do not add anything to your oil. The recommended
oils with the starburst symbol that meet GM Standard
GM4718M are all you will need for good performance
and engine protection.
Engine Oil Life System
When to Change Engine Oil
Your vehicle has a computer system that lets you
know when to change the engine oil and lter. 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 600 miles (1 000 km). 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 lter must be changed at least once a year and
at this time the system must be reset. Your dealer
has GM-trained service people who will perform this
work using genuine GM parts and reset the system.
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.
How to Reset the Engine Oil Life
System and the Oil Life Indicator
The Engine Oil Life System calculates when to
change your engine oil and lter based on vehicle use.
Anytime your oil is changed, reset the system so it
can calculate when the next oil change is required.
If a situation occurs where you change your oil prior to
a change engine oil message in the DIC being turned
on, reset the system.
5-19

After the oil has been changed, the change engine
oil message and the oil life indicator must be reset.
To reset the message and indicator, use one of
the following procedures:
Base Audio System
Press the CLR button located to the right of the DIC
display to acknowledge the change engine oil message.
This will clear the message from the display and
reset it.
To reset the oil life indicator, use the following steps:
1. Press the up or down arrow on the INFO button
located to the right of the DIC display to access
the DIC menu.
2. Once XXX% ENGINE OIL LIFE menu item is
highlighted, press and hold the CLR button.
The percentage will return to 100, and the oil life
indicator will be reset. Repeat the steps if the
percentage does not return to 100.
3. Turn the key to OFF.
If the change engine oil message comes back on when
you start your vehicle, the engine oil life system has
not reset. Repeat the procedure.
Navigation System
If you have the navigation system, see “Vehicle
Customization” in the CTS Navigation System Owner
Supplement for how to reset the oil life indicator.
What to Do with Used Oil
Used engine oil contains certain elements that may be
unhealthy for your skin and could even cause cancer.
Do not let used oil stay on your skin for very long. Clean
your skin and nails with soap and water, or a good
hand cleaner. Wash or properly dispose of clothing or
rags containing used engine oil. See the manufacturer’s
warnings about the use and disposal of oil products.
Used oil can be a threat to the environment. If you
change your own oil, be sure to drain all the oil from the
lter before disposal. Never dispose of oil by putting it
in the trash, pouring it on the ground, into sewers, or
into streams or bodies of water. Instead, recycle it
by taking it to a place that collects used oil. If you have
a problem properly disposing of your used oil, ask
your dealer, a service station or a local recycling
center for help.
5-20

Engine Air Cleaner/Filter
The engine air cleaner/lter is in the engine
compartment on the driver’s side of the vehicle,
near the front. SeeEngine Compartment Overview
on page 5-12for more information on location.
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
50,000 miles (83 000 km). SeeScheduled Maintenance
on page 6-4for 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.
CTS shown, CTS-V similar
5-21

If you get the overheat warning with no sign of steam,
try this for a minute or so:
1. In heavy traffic, let the engine idle in NEUTRAL (N)
while stopped. If it is safe to do so, pull off the
road, shift to PARK (P) or NEUTRAL (N) and let
the engine idle.
2. Set the climate controls to the highest heat
setting and fan speed and open the windows,
as necessary.
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 minutes.
If the warning does not come back on, you can drive
normally.
If the warning continues and you have not stopped, pull
over, stop, and park your vehicle right away.
If there is still no sign of steam, you can idle the engine
for three minutes while you are parked. If you still
have the warning,turn off the engine and get everyone
out of the vehicleuntil it cools down.
You may decide not to lift the hood but to get service
help right away.Overheated Engine Protection
Operating Mode
This operating mode allows your vehicle to be driven to
a safe place in an emergency. Should an overheated
engine condition exist, an overheat protection mode
which alternates ring groups of cylinders helps prevent
engine damage. In this mode, you will notice a loss
in power and engine performance. A low coolant and/or
engine overheat warning will indicate that an overheat
condition exists. Driving extended miles (km) and/or
towing a trailer in the overheat protection mode should
be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any
repair. The engine oil will be severely degraded.
Repair the cause of coolant loss and change the oil.
SeeEngine Oil on page 5-16.
5-30