service indicator CADILLAC CT4 2022 Owners Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
2 INTRODUCTION
Using this Manual
To quickly locate information about
the vehicle, use the Index in the back
of the manual. It is an alphabetical
list of what is in the manual and the
page number where it can be found.
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-15283641) -
2022 - CRC - 10/12/21
22 KEYS, DOORS, AND WINDOWS
Inclination and Intrusion Sensor
Disable Switch
It is recommended that the intrusion
and inclination sensor be deactivated
if pets are left in the vehicle or the
vehicle is being transported. With the
vehicle turned off, press
oin the
front overhead console. The indicator
light will come on momentarily,
indicating that these sensors have
been disabled for the next alarm
system arming cycle.
Immobilizer
See Radio Frequency Statement 0438.
Immobilizer Operation
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the vehicle is
turned off.
The immobilization system is
disarmed when the ignition is turned
on or to ACC/ACCESSORY and a valid
remote key is present in the vehicle.
The security light, in the instrument
cluster, comes on if there is a problem
with arming or disarming the
theft-deterrent system.
The system has one or more remote
keys matched to an immobilizer
control unit in the vehicle. Only a
correctly matched remote key will start the vehicle. If the remote key is
ever damaged, you may not be able to
start your vehicle.
When trying to start the vehicle, the
security light may come on briefly.
If the engine does not start and the
security light stays on, there is a
problem with the system. Turn the
ignition off and try again.
If the vehicle will not change ignition
modes (ACC/ACCESSORY, on, off), and
the remote key appears to be
undamaged, try another remote key.
Or, you may try placing the remote
key in the backup location. See
Remote Keyless Entry (RKE) System
Operation
07.
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

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
54 SEATS AND RESTRAINTS
locked, the interior lamps can be
turned off, and the hazard warning
flashers can be turned off using the
controls for those features. If any of
these systems are damaged in the
crash they may not operate as normal.
{Warning
A crash severe enough to inflate the
airbags may have also damaged
important functions in the vehicle,
such as the fuel system, brake and
steering systems, etc. Even if the
vehicle appears to be drivable after
a moderate crash, there may be
concealed damage that could make
it difficult to safely operate the
vehicle.
Use caution if you should attempt
to restart the engine after a crash
has occurred.
In many crashes severe enough to
inflate the airbag, windshields are
broken by vehicle deformation.
Additional windshield breakage may
also occur from the front outboard
passenger airbag.
.Airbags are designed to inflate only
once. After an airbag inflates, you
will need some new parts for the
airbag system. If you do not get
them, the airbag system will not be
there to help protect you in another
crash. A new system will include
airbag modules and possibly other
parts. The service manual for the
vehicle covers the need to replace
other parts.
.The vehicle has a crash sensing and
diagnostic module which records
information after a crash. See
Vehicle Data Recording and Privacy
0 439 and
Event Data Recorders 0440.
.Let only qualified technicians work
on the airbag system. Improper
service can mean that an airbag
system will not work properly. See
your dealer for service.
Passenger Sensing System
The vehicle has a passenger sensing
system for the front outboard
passenger position. The passenger
airbag status indicator will light on
the overhead console when the vehicle
is started.
The words ON and OFF, and the
symbols for on and off, will be visible
during the system check. When the
system check is complete, either the
word ON or OFF, and the symbol for
on or off, will be visible. See Passenger
Airbag Status Indicator 098.
The passenger sensing system turns
off the front outboard passenger
frontal airbag and knee airbag under
certain conditions. No other airbag is
affected by the passenger sensing
system.
The passenger sensing system works
with sensors that are part of the front
outboard passenger seat and seat belt.
The sensors are designed to detect the
presence of a properly seated
occupant and determine if the front
outboard passenger frontal airbag and
knee airbag should be allowed to
inflate or not.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
56 SEATS AND RESTRAINTS
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 098 for more
information, including important
safety information.
If the On Indicator Is Lit for a
Child Restraint
The passenger sensing system is
designed to turn off the front
outboard passenger frontal airbag and
knee airbag, if the system determines that an infant is present in a child
restraint. If a child restraint has been
installed and the ON indicator is lit:
1. Turn the vehicle off.
2. Remove the child restraint from the vehicle.
3. Remove any additional items from the seat such as blankets, cushions,
seat covers, seat heaters, or seat
massagers.
4. Reinstall the child restraint following the directions provided
by the child restraint manufacturer
and refer to Securing Child
Restraints (With the Seat Belt in the
Rear Seat) 073 or
Securing Child Restraints (With the
Seat Belt in the Front Seat) 075.
Make sure the seat belt retractor is
locked by pulling the shoulder belt
all the way out of the retractor
when installing the child restraint,
even if the child restraint is
equipped with a seat belt lock off.
When the retractor lock is set, the
belt can be tightened but not
pulled out of the retractor. 5. If, after reinstalling the child
restraint and restarting the vehicle,
the ON indicator is still lit, turn the
vehicle off. Then slightly recline the
vehicle seatback and adjust the
seat cushion, if adjustable, to make
sure that the vehicle seatback is
not pushing the child restraint into
the seat cushion.
Also make sure the child restraint
is not trapped under the vehicle
head restraint. If this happens,
adjust the head restraint. See Head
Restraints 030.
6. Restart the vehicle.
The passenger sensing system may or
may not turn off the airbags for a
child in a child restraint depending
upon the child’s size. It is better to
secure the child restraint in a rear
seat. Never put a rear-facing child
restraint in the front seat, even if the
ON indicator is not lit.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
58 SEATS AND RESTRAINTS
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. SeeAdding Equipment
to the Airbag-Equipped Vehicle 058 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 0437.
{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.
The operation of the airbag system
can also be affected by changing,
including improperly repairing or
replacing, any parts of the following:
.Airbag system, including airbag
modules, front or side impact
sensors, sensing and diagnostic
module, or airbag wiring
.Front seats, including stitching,
seams or zippers
.Seat belts
.Steering wheel, instrument panel,
overhead console, ceiling trim,
or pillar garnish trim
.Inner door seals, including speakers
Your dealer and the service manual
have information about the location of
the airbag modules and sensors,

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
82 INSTRUMENTS AND CONTROLS
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . . . . . 83
Steering Wheel Controls . . . . . . . . . . 83
Heated Steering Wheel . . . . . . . . . . . . 83
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Windshield Wiper/Washer . . . . . . . . 83
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Power Outlets . . . . . . . . . . . . . . . . . . . . . . 86
Wireless Charging . . . . . . . . . . . . . . . . . 86
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . . . . . . 89
Instrument Cluster (Base Level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Instrument Cluster (Uplevel) . . . . . 91
Speedometer . . . . . . . . . . . . . . . . . . . . . . . 95
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Trip Odometer . . . . . . . . . . . . . . . . . . . . . 95
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . 95
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 96
Engine Coolant Temperature
Gauge (Base Level) . . . . . . . . . . . . . . . 96 Engine Coolant Temperature
Gauge (Uplevel) . . . . . . . . . . . . . . . . . . 97
Seat Belt Reminders . . . . . . . . . . . . . . . 97
Airbag Readiness Light . . . . . . . . . . . . 98
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Charging System Light . . . . . . . . . . . . 99
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . . . . . 99
Brake System Warning Light . . . . 101
Electric Parking Brake Light . . . . . 102
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . . . . 102
Performance Shifting Light . . . . . . 103
Automatic Vehicle Hold (AVH) Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Lane Keep Assist (LKA) Light . . . 103
Automatic Emergency Braking (AEB) Disabled Light . . . . . . . . . . . 104
Vehicle Ahead Indicator . . . . . . . . . 104
Pedestrian Ahead Indicator . . . . . . 104
Traction Off Light . . . . . . . . . . . . . . . . 104
StabiliTrak OFF Light . . . . . . . . . . . . 105
Traction Control System (TCS)/ StabiliTrak Light . . . . . . . . . . . . . . . . 105
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . . . . . 105
Driver Mode Control Light . . . . . . . 106 Tire Pressure Light . . . . . . . . . . . . . . . 107
Engine Oil Pressure Light . . . . . . . . 107
Low Fuel Warning Light . . . . . . . . . 108
Security Light . . . . . . . . . . . . . . . . . . . . . 108
High-Beam On Light . . . . . . . . . . . . . 108
Lamps On Reminder . . . . . . . . . . . . . 108
Cruise Control Light . . . . . . . . . . . . . . 109
Door Ajar Light . . . . . . . . . . . . . . . . . . . 109
Information Displays
Driver Information Center (DIC)
(Base Level) . . . . . . . . . . . . . . . . . . . . . 109
Driver Information Center (DIC) (Uplevel) . . . . . . . . . . . . . . . . . . . . . . . . . 112
Head-Up Display (HUD) . . . . . . . . . 115
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . . . . . 119
Engine Power Messages . . . . . . . . . . 119
Vehicle Speed Messages . . . . . . . . . 120
Vehicle Personalization
Vehicle Personalization . . . . . . . . . . 120
Universal Remote System
Universal Remote System . . . . . . . . 125
Universal Remote System Programming . . . . . . . . . . . . . . . . . . . 125
Universal Remote System Operation . . . . . . . . . . . . . . . . . . . . . . . . 127

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
98 INSTRUMENTS AND CONTROLS
Front Passenger Seat Belt
Reminder Light
The vehicle may have a front
passenger seat belt reminder light
near the passenger airbag status
indicator. SeePassenger Sensing
System 054.
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 048.
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.
Passenger Airbag Status
Indicator
The vehicle has a passenger sensing
system. See Passenger Sensing System
0 54 for important safety information.
The overhead console has a passenger
airbag status indicator.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
INSTRUMENTS AND CONTROLS 99
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 system. To help avoid
injury to yourself or others, have
the vehicle serviced right away. See
Airbag Readiness Light
098 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.
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 may

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
104 INSTRUMENTS AND CONTROLS
Automatic Emergency
Braking (AEB) Disabled
Light
This indicator will display when
Automatic Emergency Braking or
Front Pedestrian Braking has been
turned off or is currently unavailable
due to malfunction.
SeeAutomatic Emergency Braking
(AEB) 0303.
See Front Pedestrian Braking (FPB)
System 0305.
Vehicle Ahead Indicator
If equipped, this indicator will display
green when a vehicle is detected
ahead and amber when you are
following a vehicle ahead much too
closely.
See Forward Collision Alert (FCA)
System 0301.
Pedestrian Ahead Indicator
If equipped, this indicator will display
amber when a nearby pedestrian is
detected in front of the vehicle.
See Front Pedestrian Braking (FPB)
System 0305.
Traction Off Light
This light comes on briefly when the
vehicle is turned on. If it does not,
have the vehicle serviced by your
dealer. If the system is working
normally, the indicator light then
turns off.
The traction off light comes on when
the Traction Control System (TCS) has
been turned off. If StabiliTrak/
Electronic Stability Control (ESC) is
turned off, TCS is also turned off. To
turn TCS and ESC off and on, see
Traction Control/Electronic Stability
Control 0257.
If TCS is off, wheel spin is not limited
unless necessary to help protect the
driveline from damage. Adjust driving
accordingly.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
INSTRUMENTS AND CONTROLS 105
StabiliTrak OFF Light
This light comes on briefly when the
vehicle is turned on. If the light does
not come on, have the vehicle serviced
by your dealer. If the system is
working normally, the indicator light
then turns off.
This light comes on when the
StabiliTrak/Electronic Stability Control
(ESC) system is turned off.
If StabiliTrak/ESC is off, the Traction
Control System (TCS) is also off. To
turn ESC off and on, seeTraction
Control/Electronic Stability Control
0 257.
If ESC and TCS are off, the systems do
not assist in controlling the vehicle.
Adjust driving accordingly.
Traction Control System
(TCS)/StabiliTrak Light
This light comes on briefly when the
vehicle is turned on.
If the light does not come on, have
the vehicle serviced by your dealer.
If the system is working normally, the
indicator light turns off.
If the light is on and not flashing, the
TCS and potentially the StabiliTrak/
ESC system are not fully operational
and may not assist in maintaining
control. Adjust driving accordingly.
If the condition persists, see your
dealer as soon as possible. A Driver
Information Center (DIC) message
may display.
The light flashes when the TCS and/or
the StabiliTrak/ESC system is actively
working. See
Traction Control/Electronic Stability
Control 0257.
Engine Coolant
Temperature Warning Light
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
Overheating 0342.