alarm CADILLAC CT4 2023 Owners Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
8 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Key . . . . . . . . . . . . . . . . . . . . . 9
Remote Key Operation . . . . . . 9
Remote Vehicle Start . . . . . . . 16
Door Locks . . . . . . . . . . . . . . . . . . . . 18
Power Door Locks . . . . . . . . . . 20
Delayed Locking . . . . . . . . . . . . . 20
Automatic Door Locks . . . . . . 21
Lockout Protection . . . . . . . . . 21
Safety Locks . . . . . . . . . . . . . . . . . . 22
Doors
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Vehicle Security
Vehicle Security . . . . . . . . . . . . . 24
Vehicle Alarm System . . . . . . 24
Immobilizer . . . . . . . . . . . . . . . . . . . . 27
Immobilizer Operation . . . . . . 27
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . 28
Power Mirrors . . . . . . . . . . . . . . . . 28
Folding Mirrors . . . . . . . . . . . . . . . 29
Heated Mirrors . . . . . . . . . . . . . . 30Automatic Dimming
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reverse Tilt Mirrors . . . . . . . . 30
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 31
Manual Rearview Mirror . . . 31
Automatic Dimming Rearview Mirror . . . . . . . . . . . . 31
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 31
Power Windows . . . . . . . . . . . . . . 31
Sun Visors . . . . . . . . . . . . . . . . . . . . . 33
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 34
Keys and Locks
Keys
{Warning
Leaving children in a vehicle
with a remote key is
dangerous and children or
others could be seriously
injured or killed. They could
operate the power windows
or other controls or make
the vehicle move. The
windows will function with
the remote key in the
vehicle, and children or
others could be caught in
the path of a closing
window. Do not leave
children in a vehicle with a
remote key.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
10 Keys, Doors, and Windows
Other conditions can impact
the performance of the
remote key. See Remote Key
09.
Q:Press to lock all doors and
the fuel door, if equipped. The
turn signal indicators may
flash and/or the horn may
sound on the second press to
indicate locking. To view
available settings for this
feature, touch the Settings
icon on the infotainment home
page. Select “Vehicle”to
display the list of available
options and select “Remote
Lock, Unlock, Start”. Pressing
Qmay also arm the
alarm system. See Vehicle
Alarm System 024.
If equipped with remote
folding mirrors, double
pressing and holding
Qon the
remote key may fold the
mirrors. See Folding Mirrors
0 29.
K:Press to unlock the driver
door and the fuel door,
if equipped. Press again within
five seconds to unlock all
doors. The remote key can be
programmed to unlock all
doors on the first button
press. To view available
settings for this feature, touch
the Settings icon on the
infotainment home page.
Select “Vehicle” to display the
list of available options and
select “Remote Lock, Unlock,
Start”. When remotely
unlocking the vehicle at night,
the headlamps and back-up
lamps may come on for about
30 seconds to light your approach to the vehicle. The
turn signal indicators may
flash to indicate unlocking.
Pressing
Kwill disarm the
alarm system. See Vehicle
Alarm System 024.
Double press and hold
Kfor
about three seconds to
remotely open the windows,
if enabled. To view available
settings for this feature, touch
the Settings icon on the
infotainment home page.
Select “Vehicle” to display the
list of available options and
select “Remote Lock, Unlock,
Start”.
If equipped with remote
folding mirror, double pressing
and holding
Kon the remote
key may unfold the mirrors.
See Folding Mirrors 029.
S:PressStwice to start the
engine from outside the
vehicle using the remote key.
See Remote Vehicle Start 016.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 11
7:Press and release one time
to initiate vehicle locator. The
exterior lamps flash and the
horn chirps three times. Press
and hold
7for more than
three seconds to sound the
panic alarm. The horn sounds
and the turn signal lamps flash
for 30 seconds, or until
7is
pressed again or the vehicle is
started.
X: Press twice to release the
trunk.
Keyless Access Operation
The Keyless Access system
lets you lock and unlock the
doors and access the trunk
without removing the remote
key from your pocket, purse,
briefcase, etc. The remote key
must be within 1 m (3 ft) of the
trunk or door being opened.
The button is on the outside
door handle.
The Keyless Access system
can be programmed to be
turned off or to unlock all
doors on the first door handle press from the driver door.
Keyless unlocking can also be
turned off. To view available
settings for this feature, touch
the Settings icon on the
infotainment home page.
Select
“Vehicle” to display the
list of available options and
select “Remote Lock, Unlock,
Start”.
If equipped with memory
seats, remote keys 1 and 2 are
linked to seating positions of
memory 1 or 2. See Memory
Seats 041.
Keyless Unlocking/Locking
from the Driver Door
When the doors are locked
and the remote key is within
1 m (3 ft) of the door handle,
pressing the door handle
button on the driver door
handle will unlock the driver
door. If the door handle button
is pressed again within
five seconds, all passenger
doors will unlock. If equipped with remote
folding mirror, pressing the
driver door handle button may
fold and unfold the mirrors.
See Folding Mirrors
029.
Driver Door Shown,
Passenger Similar
Pressing the door handle
button will cause all doors to
lock if any of the following
occur:
.It has been more than
five seconds since the first
door handle button press.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
12 Keys, Doors, and Windows
.Two door handle button
presses were used to unlock
all doors.
.Any vehicle door has opened
and all doors are now closed.
Keyless Unlocking/Locking
from the Passenger Doors
When the doors are locked
and the remote key is within
1 m (3 ft) of the door handle,
pressing the door handle
button on a passenger door
handle will unlock all doors.
Pressing the door handle
button will cause all doors to
lock if any of the following
occur:
.The door handle button was
used to unlock all doors.
.Any vehicle door has opened
and all doors are now closed.
Disable/Enable Keyless
Unlocking of Exterior Door
Handles and Trunk
If equipped, keyless unlocking
of the exterior door handles
and trunk can be disabled and
enabled. Disabling Keyless Unlocking:
With the vehicle off, press and
hold
QandKon the remote
key at the same time for
approximately four seconds.
The turn signal lamps will flash
four times quickly to indicate
access is disabled. Using any
exterior handle to unlock the
doors or open the trunk will
cause the turn signal lamps to
flash four times quickly,
indicating access is disabled.
If disabled, disarm the alarm
system before starting the
vehicle.
Disabling Keyless Unlocking
may also be configured under
Vehicle Personalization. To
view available settings for this
feature, touch the Settings
icon on the infotainment home
page. Select “Vehicle”to
display the list of available
options and select “Remote
Lock, Unlock, Start”. Enabling Keyless Unlocking:
With the vehicle off, press and
holdQandKon the remote
key at the same time for
approximately four seconds.
The turn signal lamps will flash
twice quickly to indicate
access is enabled.
Enabling Keyless Unlocking
may also be configured under
Vehicle Personalization. To
view available settings for this
feature, touch the Settings
icon on the infotainment home
page. Select “Vehicle”to
display the list of available
options and select “Remote
Lock, Unlock, Start”.
Passive (Walkaway) Locking
The Keyless Access system
will lock the vehicle several
seconds after all doors are
closed if the vehicle is off and
at least one remote key has
been removed or none remain
in the vehicle.
If equipped, the fuel door will
also lock.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
24 Keys, Doors, and Windows
closing the trunk; this will
cause the trunk lid to be
unlatched.
The trunk has an electric latch.
If the vehicle has lost power or
the battery is disconnected,
the trunk will not open. If this
happens, enter the rear
compartment by folding the
rear seats down, and pull the
emergency release handle to
open the trunk.
Emergency Trunk Release
HandleCaution
Do not use the emergency
trunk release handle as a
tie-down or anchor point
when securing items in the
trunk as it could damage the
handle.
There is a glow-in-the-dark
emergency trunk release
handle on the trunk lid. This
handle will glow following
exposure to light. Pull the
release handle to open the
trunk from the inside.Vehicle Security
This vehicle has
theft-deterrent features;
however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System
This vehicle has an anti-theft
alarm system.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 25
The indicator light, on the
instrument panel near the
windshield, indicates the
status of the system.
Off :Alarm system is
disarmed.
On Solid : Vehicle is secured
during the delay to arm the
system.
Fast Flash : Vehicle is
unsecured. A door, the hood,
or the trunk is open.
Slow Flash : Alarm system is
armed.
Arming the Alarm System
1. Turn off the vehicle.
2. Lock the vehicle in one of three ways:
.Use the remote key.
.Use the Keyless Access
system.
.With a door open, press
Qon the interior of
the door.
3. After 30 seconds the alarm system will arm, and
the indicator light will begin
to slowly flash indicating
the alarm system is
operating. Pressing
Qon
the remote key a second
time will bypass the
30-second delay and
immediately arm the alarm
system.
The vehicle alarm system will
not arm if the doors are locked
with the mechanical key.
If the driver door is opened
without first unlocking with
the remote key, the horn will chirp and the lights will flash
to indicate pre-alarm. If the
vehicle is not started, or the
door is not unlocked by
pressing
Kon the remote key
during the 10-second
pre-alarm, the alarm will be
activated.
The alarm will also be
activated if a passenger door,
the trunk, or the hood is
opened without first disarming
the system. When the alarm is
activated, the turn signals
flash and the horn sounds for
about 30 seconds. The alarm
system will then re-arm to
monitor the next unauthorized
event.
Disarming the Alarm
System
To disarm the alarm system or
turn off the alarm if it has
been activated:
.PressKon the remote key.
.Unlock the vehicle using the
Keyless Access system.
.Start the vehicle.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
26 Keys, Doors, and Windows
To avoid setting off the alarm
by accident:
.Lock the vehicle after all
occupants have left the
vehicle and all doors are
closed.
.Always unlock a door with
the remote key or use the
Keyless Access system.
Unlatching the driver door
with the mechanical key will
not disarm the system or turn
off the alarm.
How to Detect a Tamper
Condition
IfKis pressed on the remote
key and the horn chirps and
the lights flash three times, a
previous alarm occurred while
the system was armed.
If the alarm has been
activated, a message will
appear on the DIC.
Power Sounder,
Inclination Sensor, and
Intrusion Sensor
In addition to the standard
theft-deterrent system
features, this system may also
have a power sounder,
inclination sensor, and
intrusion sensor.
The power sounder provides
an audible alarm which is
distinct from the vehicle’s
horn. It has its own power
source, and can sound an
alarm if the vehicle’s battery is
compromised.
The inclination sensor can set
off the alarm if it senses
movement of the vehicle, such
as when a tire is removed.
Make sure the vehicle's alarm
is not armed prior to any
jacking. The intrusion sensor monitors
the vehicle interior, and can
activate the alarm if it senses
unauthorized entry into the
vehicle's interior. Do not allow
passengers or pets to remain
in the vehicle when the
intrusion sensor is activated.
Before arming the
theft-deterrent system and
activating the intrusion sensor:
.Make sure all doors and
windows are completely
closed.
.Secure any loose items such
as sun glasses.
.Make sure there are no
obstructions blocking the
sensors in the front
overhead console.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 27
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 0494.
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 accessory
mode 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 (accessory
mode, on, off), and the remote
key appears to be undamaged,
try another remote key. Or,
you may try placing the

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
OnStar 501
With Roadside Assistance,
Advisors can locate a nearby
service provider to help with a
flat tire, a battery jump, or an
empty gas tank.
Security
If equipped, OnStar provides
these services:
.With Stolen Vehicle
Assistance, OnStar Advisors
can use GPS to pinpoint the
vehicle and help authorities
quickly recover it.
.With Remote Ignition Block,
if equipped, OnStar can
block the vehicle from being
restarted.
.With Stolen Vehicle
Slowdown, if equipped,
OnStar can work with law
enforcement to gradually
slow the vehicle down.
Theft Alarm Notification
If equipped, if the doors are
locked and the vehicle alarm
sounds, a notification by text,
e-mail, or phone call will besent. If the vehicle is stolen, an
OnStar Advisor can work with
authorities to recover the
vehicle.
OnStar Additional
Information
In-Vehicle Audio
Messages
Audio messages may play
important information at the
following times:
.Prior to vehicle purchase.
Press
Qto set up an
account.
.After change in ownership
and at 90 days.
Transferring Service
PressQto request account
transfer eligibility information.
The Advisor can cancel or
change account information.
Selling/Transferring the
Vehicle
Call 1-888-4ONSTAR
(1-888-466-7827) immediately
to terminate your OnStar or
connected services if the
vehicle is disposed of, sold,
transferred, or if the
lease ends.
Reactivation for
Subsequent Owners
PressQand follow the
prompts to speak to an
Advisor as soon as possible.
The Advisor will update vehicle
records and explain OnStar or
connected service options.
How OnStar Service
Works
Automatic Crash Response,
Emergency Services, Crisis
Assist, Stolen Vehicle
Assistance, Remote Services,
and Roadside Assistance are
available on most vehicles. Not
all OnStar services are
available everywhere or on all

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
INDEX 509
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . 370
Accessory Power . . . . . . . . . . . .267
Active Rev Match . . . . . . . . . . . . . . . . . . . 285
Adaptive Cruise Control . . . . . . . . . . . . . . 304
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . . 366
Additional OnStar Information . . . . . . . . 501
Adjustments Lumbar, Front Seats . . . . . . . 40
Thigh Support . . . . . . . . . . . . . . . . 39
Agreements Trademarks andLicense . . . . . . . . . . . . . . . . . . . . . . 215
Air
Cleaner/Filter, Engine . . . . 384
Conditioning . . . . . . . . . . . . . . . . 225
Filter Life System . . . . . . . . . 383
Filter, PassengerCompartment . . . . . . . . . . . . . . 231
Vents . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Airbag System . . . . . . . . . . . . . . . . . 59 Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Airbag System (cont'd)
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 64
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . . . . 66
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 63
What Will You See after an Airbag
Inflates? . . . . . . . . . . . . . . . . . . . . . . 64
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 62
Where Are the Airbags? . . . . . . . . . . . . . . . . . . . . . . . 61
Airbags Adding Equipment to
the Vehicle . . . . . . . . . . . . . . . . . . . 70
Passenger Status Indicator . . . . . . . . . . . . . . . . . . . . . . 117
Readiness Light . . . . . . . . . . . . . 116
Replacing System Parts after a Crash . . . . . . . 72
Servicing Airbag-Equipped
Vehicles . . . . . . . . . . . . . . . . . . . . . . 70
Alarm
Vehicle Security . . . . . . . . . . . . . 24