service indicator CADILLAC CT4 2023 Owners Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Introduction 3
Danger, Warning, and
Caution
Warning messages found on
vehicle labels and in this
manual describe hazards and
what to do to avoid or
reduce them.
{Danger
Danger indicates a hazard
with a high level of risk
which will result in serious
injury or death.
{Warning
Warning indicates a hazard
that could result in injury or
death.
Caution
Caution indicates a hazard
that could result in property
or vehicle damage.
A circle with a slash through it
is a safety symbol which
means“Do not,” “Do not do
this,” or“Do not let this
happen.”
Symbols
The vehicle has components
and labels that use symbols
instead of text. Symbols are
shown along with the text
describing the operation or
information relating to a
specific component, control,
message, gauge, or indicator.
M: Shown when the owner’s
manual has additional
instructions or information.
*: Shown when the service
manual has additional
instructions or information.
0: Shown when there is more
information on another page —
“see page.”
Vehicle Symbol Chart
Here are some additional
symbols that may be found on
the vehicle and what they
mean. See the features in this
manual for information.
u: Air Conditioning System
G:Air Conditioning
Refrigerant Oil
9: Airbag Readiness Light
!:Antilock Brake
System (ABS)
$: Brake System Warning
Light
9: Dispose of Used
Components Properly
P: Do Not Apply High
Pressure Water
B: Engine Coolant
Temperature
_: Flame/Fire Prohibited

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
28 Keys, Doors, and Windows
remote key in the backup
location. See Remote Key
Operation09.
If the ignition modes will not
change with the other remote
key or in the backup location,
the vehicle needs service.
If the ignition does change
modes, the first remote key
may be faulty. See your dealer.
It is possible for the
immobilizer system to learn
new or replacement remote
keys. Up to eight remote keys
can be programmed for the
vehicle. To program additional
remote keys, see
“Programming Remote Keys to
the Vehicle” under Remote
Key Operation 09.
Do not leave the remote key
or device that disarms or
deactivates the
theft-deterrent system in the
vehicle.Exterior Mirrors
Convex Mirrors
{Warning
A convex mirror can make
things, like other vehicles,
look farther away than they
really are. If you cut too
sharply into the right lane,
you could hit a vehicle on
the right. Check the inside
mirror or glance over your
shoulder before changing
lanes.
The passenger side mirror is
convex shaped. A convex
mirror's surface is curved so
more can be seen from the
driver seat.
Power Mirrors
To adjust each mirror: 1. Press
jor|to select the
driver or passenger side
mirror. The indicator light
will illuminate.
2. Press the arrows on the control pad to move the
mirror in the desired
direction.
3. Adjust each outside mirror so that a little of the
vehicle and the area
behind it can be seen.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Seats and Restraints 67
Warning (Continued)
airbag will not deploy under
some unusual circumstance,
even though the airbag(s)
are off.
Never put a rear-facing child
restraint in the front seat,
even if the airbag is off.
If securing a forward-facing
child restraint in the front
outboard passenger seat,
always move the seat as far
back as it will go. It is better
to secure child restraints in
the rear seat. Consider
using another vehicle to
transport the child when a
rear seat is not available.
The passenger sensing
system is designed to turn off
the front outboard passenger
frontal airbag and knee
airbag if:
.The front outboard
passenger seat is
unoccupied.
.The system determines an
infant is present in a child
restraint.
.A front outboard passenger
takes his/her weight off of
the seat for a period of time.
When the passenger sensing
system has turned off the
front outboard passenger
frontal airbag and knee airbag,
the OFF indicator will light and
stay lit as a reminder that the
airbags are off. See Passenger
Airbag Status Indicator 0117.
The passenger sensing
system is designed to turn on
the front outboard passenger
frontal airbag and knee airbag,
anytime the system senses
that a person of adult size is
sitting properly in the front
outboard passenger seat.
When the passenger sensing
system has allowed the
airbags to be enabled, the ON
indicator will light and stay lit
as a reminder that the airbags
are active. For some children, including
children in child restraints, and
for very small adults, the
passenger sensing system
may or may not turn off the
front outboard passenger
frontal airbag and knee airbag,
depending upon the person's
seating posture and body
build. Everyone in the vehicle
who has outgrown child
restraints should wear a seat
belt properly
—whether or not
there is an airbag for that
person.
{Warning
If the airbag readiness light
ever comes on and stays on,
it means that something may
be wrong with the airbag
system. To help avoid injury
to yourself or others, have
the vehicle serviced right
away. See Airbag Readiness
Light 0116 for more
information, including
important safety
information.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
70 Seats and Restraints
and braking, which helps the
passenger sensing system
maintain the passenger airbag
status. See“Seat Belts” and
“Child Restraints” in the Index
for additional information
about the importance of
proper restraint use.
A thick layer of additional
material, such as a blanket or
cushion, or aftermarket
equipment such as seat
covers, seat heaters, and seat
massagers can affect how well
the passenger sensing system
operates. We recommend that
you not use seat covers or
other aftermarket equipment
except when approved by GM
for your specific vehicle. See
Adding Equipment to the
Airbag-Equipped Vehicle 070
for more information about
modifications that can affect
how the system operates.
The ON indicator may be lit if
an object, such as a briefcase,
handbag, grocery bag, laptop,
or other electronic device, is put on an unoccupied seat.
If this is not desired, remove
the object from the seat.
{Warning
Stowing articles under the
passenger seat or between
the passenger seat cushion
and seatback may interfere
with the proper operation of
the passenger sensing
system.
Servicing the
Airbag-Equipped
Vehicle
Airbags affect how the vehicle
should be serviced. There are
parts of the airbag system in
several places around the
vehicle. Your dealer and the
service manual have
information about servicing
the vehicle and the airbag
system. To purchase a service
manual, see Publication
Ordering Information
0494.
{Warning
For up to 10 seconds after
the vehicle is turned off and
the battery is disconnected,
an airbag can still inflate
during improper service. You
can be injured if you are
close to an airbag when it
inflates. 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
qualified to do so.
Adding Equipment to
the Airbag-Equipped
Vehicle
Adding accessories that
change the vehicle's frame,
bumper system, height, front
end, or side sheet metal may
keep the airbag system from
working properly.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Instruments and Controls 97
Instruments and
Controls
Controls
Steering WheelAdjustment . . . . . . . . . . . . . . . . . . 98
Heated Steering Wheel . . . 98
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Windshield Wiper/ Washer . . . . . . . . . . . . . . . . . . . . . . . 99
Compass . . . . . . . . . . . . . . . . . . . . . . 101
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Power Outlets . . . . . . . . . . . . . . . 101
Wireless Charging . . . . . . . . . 102
Warning Lights, Gauges,
and Indicators
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . 105
Instrument Cluster (Base Level) . . . . . . . . . . . . . . . . . . . . . . . . 106
Instrument Cluster (Uplevel) . . . . . . . . . . . . . . . . . . . . . 108
Speedometer . . . . . . . . . . . . . . . . 112
Odometer . . . . . . . . . . . . . . . . . . . . . 112
Trip Odometer . . . . . . . . . . . . . . . 112
Tachometer . . . . . . . . . . . . . . . . . . 113
Fuel Gauge . . . . . . . . . . . . . . . . . . . 113 Engine Coolant
Temperature Gauge
(Base Level) . . . . . . . . . . . . . . . . 114
Engine Coolant Temperature Gauge
(Uplevel) . . . . . . . . . . . . . . . . . . . . . 115
Seat Belt Reminders . . . . . . . 115
Airbag Readiness Light . . . 116
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . 117
Charging System Light . . . 117
Malfunction Indicator Lamp (Check Engine
Light) . . . . . . . . . . . . . . . . . . . . . . . . . 118
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 120
Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . 121
Antilock Brake System (ABS) Warning Light . . . . . 121
Performance Shifting Light . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Automatic Vehicle Hold (AVH) Light . . . . . . . . . . . . . . . . . 122
Lane Keep Assist (LKA) Light . . . . . . . . . . . . . . . . . . . . . . . . . . 122 Automatic Emergency
Braking (AEB) Disabled
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Vehicle Ahead Indicator . . . . . . . . . . . . . . . . . . . . . 123
Pedestrian Ahead Indicator . . . . . . . . . . . . . . . . . . . . . 123
Traction Off Light . . . . . . . . . 123
StabiliTrak OFF Light . . . . . 124
Traction Control System (TCS)/StabiliTrak
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Engine Coolant Temperature Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Driver Mode Control Light . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Tire Pressure Light . . . . . . . . 126
Engine Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Low Fuel Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Security Light . . . . . . . . . . . . . . . 128
High-Beam On Light . . . . . . 128
Lamps On Reminder . . . . . . 128
Cruise Control Light . . . . . . 128
Door Ajar Light . . . . . . . . . . . . . 129

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Instruments and Controls 105
1. Redistributions of sourcecode must retain the
above copyright notice,
this list of conditions and
the following disclaimer.
2. Redistributions in binary form must reproduce the
above copyright notice,
this list of conditions and
the following disclaimer in
the documentation and/or
other materials provided
with the distribution.
3. Neither the name of the copyright holder nor the
names of its contributors
may be used to endorse or
promote products derived
from this software without
specific prior written
permission.
THIS SOFTWARE IS
PROVIDED BY THE
COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE
COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL,
EXEMPLARY, OR
CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR
BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF
ADVISED OF THE
POSSIBILITY OF SUCH
DAMAGE.Warning Lights,
Gauges, and
Indicators
Warning lights and gauges can
signal that something is wrong
before it becomes serious
enough to cause an expensive
repair or replacement. Paying
attention to the warning lights
and gauges could prevent
injury.
Some warning lights come on
briefly when the engine is
started to indicate they are
working. When one of the
warning lights comes on and
stays on while driving, or when
one of the gauges shows
there may be a problem, check
the section that explains what
to do. Waiting to do repairs
can be costly and even
dangerous.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
116 Instruments and Controls
If the driver seat belt is
buckled, neither the light nor
the chime comes on.
Front Passenger Seat Belt
Reminder Light
The vehicle may have a front
passenger seat belt reminder
light near the passenger
airbag status indicator. See
Passenger Sensing System
066.
When the vehicle is started,
this light flashes and a chime
may come on to remind
passengers to fasten their
seat belt.
Then the light stays on solid
until the belt is buckled. This
cycle continues several times
if the front passenger remains
or becomes unbuckled while
the vehicle is moving. If the front passenger seat
belt is buckled, neither the
chime nor the light comes on.
The front passenger seat belt
reminder light and chime may
come on if an object is put on
the seat such as a briefcase,
handbag, grocery bag, laptop,
or other electronic device. To
turn off the reminder light
and/or chime, remove the
object from the seat or buckle
the seat belt.
Airbag Readiness
Light
This light shows if there is an
electrical problem with the
airbag system. It is located in
the instrument cluster. The
system check includes the
airbag sensor(s), the
passenger sensing system,
the pretensioners, the airbag
modules, the wiring, and the
crash sensing and diagnostic
module. For more information
on the airbag system, see
Airbag System
059.
The airbag readiness light
comes on for several seconds
when the vehicle is started.
If the light does not come on
then, have it fixed immediately.
{Warning
If the airbag readiness light
stays on after the vehicle is
started or comes on while
driving, it means the airbag
system might not be working
properly. The airbags in the
vehicle might not inflate in a
crash, or they could even
inflate without a crash. To
help avoid injury, have the
vehicle serviced right away.
If there is a problem with the
airbag system, a Driver
Information Center (DIC)
message may also come on.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Instruments and Controls 117
Passenger Airbag
Status Indicator
The vehicle has a passenger
sensing system. See
Passenger Sensing System
066 for important safety
information. The overhead
console has a passenger
airbag status indicator.
When the vehicle is started,
the passenger airbag status
indicator will light ON and OFF,
and the symbols for on and
off, for several seconds as a
system check. Then, after
several more seconds, the
status indicator will light either
ON or OFF, and either the
symbol for on or off, to let you
know the status of the front
outboard passenger frontal
airbag and knee airbag. If the word ON, and the on
symbol, is lit on the passenger
airbag status indicator, it
means that the front outboard
passenger frontal airbag and
knee airbag are allowed to
inflate.
If the word OFF, and the off
symbol, is lit on the passenger
airbag status indicator, it
means that the passenger
sensing system has turned off
the front outboard passenger
frontal airbag and knee airbag.
If, after several seconds, all of
the symbols remain lit, or if no
symbols are lit, or if the airbag
readiness light is on, there
may be a problem with the
lights or the passenger
sensing system. See your
dealer for service right away.
{Warning
If the airbag readiness light
ever comes on and stays on,
it means that something may
be wrong with the airbag
(Continued)
Warning (Continued)
system. To help avoid injury
to yourself or others, have
the vehicle serviced right
away. See Airbag Readiness
Light0116 for more
information, including
important safety
information.
Charging System
Light
The charging system light
comes on briefly when the
ignition is turned on, but the
engine is not running, as a
check to show the light is
working. It should go out when
the engine is started.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
118 Instruments and Controls
If the light stays on, or comes
on while driving, there may be
a problem with the electrical
charging system. Have it
checked by your dealer.
Driving while this light is on
could drain the battery.
When this light comes on, or is
flashing, the Driver Information
Center (DIC) also displays a
message.
If a short distance must be
driven with the light on, be
sure to turn off all
accessories, such as the radio
and air conditioner. Find a safe
place to stop the vehicle.
Malfunction Indicator
Lamp (Check Engine
Light)
This light is part of the
vehicle’s emission control
on-board diagnostic system.
If this light is on while the
engine is running, a
malfunction has been
detected and the vehicle mayrequire service. The light
should come on to show that it
is working when the ignition is
in Service Mode. See Ignition
Positions
0261.
Malfunctions are often
indicated by the system
before any problem is
noticeable. Being aware of the
light and seeking service
promptly when it comes on
may prevent damage.
Caution
If the vehicle is driven
continually with this light on,
the emission control system
may not work as well, the
fuel economy may be lower,
and the vehicle may not run
smoothly. This could lead to
(Continued)
Caution (Continued)
costly repairs that might not
be covered by the vehicle
warranty.
Caution
Modifications to the engine,
transmission, exhaust,
intake, or fuel system, or the
use of replacement tires
that do not meet the original
tire specifications, can cause
this light to come on. This
could lead to costly repairs
not covered by the vehicle
warranty. This could also
affect the vehicle’s ability to
pass an Emissions
Inspection/Maintenance
test. See Accessories and
Modifications0370.
If the light is flashing : A
malfunction has been
detected that could damage
the emission control system

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Instruments and Controls 125
On some vehicles this light
comes on briefly while starting
the vehicle. If it does not, have
the vehicle serviced by the
dealer. If the system is
working normally the indicator
light goes off. For vehicles
with the reconfigurable
cluster, this light may not
come on when starting the
vehicle.
Caution
The engine coolant
temperature warning light
indicates that the vehicle
has overheated. Driving with
this light on can damage the
engine and it may not be
covered by the vehicle
warranty. See Engine
Overheating0391.
The engine coolant
temperature warning light
comes on when the engine has
overheated. If this happens pull over and
turn off the engine as soon as
possible. See Engine
Overheating
0391.
Driver Mode Control
Light
This light comes on when
Sport Mode is selected.
This light comes on when
Track Mode is selected. See
Driver Mode Control 0292.
This light comes on when
Snow/Ice Mode is selected.
This light comes on when V
Mode is selected. See Driver
Mode Control 0292.
This light comes on when My
Mode is selected. See Driver
Mode Control 0292.