2021 CADILLAC CT4 trunk

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
6 KEYS, DOORS, AND WINDOWS
Keys, Doors, and
Windows
Keys and Locks
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote Keyless Entry (RKE) System Operation . . . . . . . . . . . . . . . . . 7
Remote Vehicle Start . . . . . . . . . . . . . . 13
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Door Locks . . . . . . . . . . . . . . . . . 17
Delayed Locking . . . . . . . . . . . . . . . . . . . 17
Automatic Door Locks . . . . . . . . . . . . 17
Lockout Protection . . . . . . . . . . . . . . . . 18
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . 18
Doors
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . . . . . 20
Vehicle Alarm System . . . . . . . . . . . . . 20
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . 22
Immobilizer Operation . . . . . . . . . . . . 23
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . . . . . 23
Power Mirrors . . . . . . . . . . . . . . . . . . . . . . 24
Folding Mirrors . . . . . . . . . . . . . . . . . . . . 24
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . 25
Automatic Dimming Mirror . . . . . . . 25
Reverse Tilt Mirrors . . . . . . . . . . . . . . . 25
Interior Mirrors
Interior Rearview Mirrors . . . . . . . . . 26
Manual Rearview Mirror . . . . . . . . . . 26
Automatic Dimming Rearview Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Windows . . . . . . . . . . . . . . . . . . . . 26
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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-14584335) -
2021 - CRC - 11/23/20
8 KEYS, DOORS, AND WINDOWS
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. See Vehicle
Personalization 0117.
Pressing
Qmay also arm the alarm
system. See Vehicle Alarm System 020.
If equipped with remote folding
mirrors, pressing
Qon the remote key
may fold the mirrors. See Folding
Mirrors 024.
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. See
Vehicle
Personalization 0117. 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 020.
Press and hold
Kfor about
three seconds to remotely open the
windows, if enabled. See Vehicle
Personalization 0117.
If equipped with remote folding
mirror, pressing
Kon the remote key
may unfold the mirrors. See Folding
Mirrors 024.
S:PressStwice to start the engine
from outside the vehicle using the
remote key. See Remote Vehicle Start
0 13.
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. See Vehicle Personalization 0117.
If equipped with memory seats,
remote keys 1 and 2 are linked to
seating positions of memory 1 or 2.
See Memory Seats 034.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
KEYS, DOORS, AND WINDOWS 9
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. SeeFolding Mirrors024.
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.
.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
Q
andKon 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. See Vehicle
Personalization 0117.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
10 KEYS, DOORS, AND WINDOWS
Enabling Keyless Unlocking:
With the vehicle off, press and hold
Q
andKon 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. See Vehicle
Personalization 0117.
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.
If other electronic devices interfere
with the remote key signal, the vehicle
may not detect the remote key inside
the vehicle. If passive (walkaway)
locking is enabled, the doors may lock
with the remote key inside the vehicle.
Do not leave the remote key in an
unattended vehicle. To customize the doors to
automatically lock when exiting the
vehicle, see
Vehicle Personalization
0 117.
If equipped with remote folding
mirror, passive (walkaway) locking
may fold the mirrors. See Folding
Mirrors 024.
Temporary Disable of Passive
(Walkaway) Locking
Temporarily disable passive locking by
pressing and holding
Kon the
interior door switch with a door open
for at least four seconds, or until three
chimes are heard. Passive (walkaway)
locking will then remain disabled until
the vehicle is turned on.
Remote Key Left In Vehicle Alert
When the vehicle is turned off and a
remote key is left in the vehicle, the
horn will chirp three times after all
doors are closed. To turn on or off see
Vehicle Personalization 0117. Remote Key No Longer In Vehicle
Alert
If the vehicle is on, with a door open,
and then all doors are closed, the
vehicle will check for a remote key
inside. If a remote key is not detected,
the Driver Information Center (DIC)
will display NO KEY FOUND and the
horn will chirp three times.
This occurs only once each time the
vehicle is driven. See
Vehicle
Personalization 0117.
Keyless Trunk Opening
Press the touch pad on the rear of the
trunk above the license plate if the
remote key is within 1 m (3 ft).
Mechanical Key Access
To access a vehicle with a weak
remote key battery, see Door Locks
0 15.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
KEYS, DOORS, AND WINDOWS 15
Door Locks
{Warning
Unlocked doors can be dangerous.
.Passengers, especially children,
can easily open the doors and
fall out of a moving vehicle. The
doors can be unlocked and
opened while the vehicle is
moving. The chance of being
thrown out of the vehicle in a
crash is increased if the doors are
not locked. So, all passengers
should wear seat belts properly
and the doors should be locked
whenever the vehicle is driven.
.Young children who get into
unlocked vehicles may be unable
to get out. A child can be
overcome by extreme heat and
can suffer permanent injuries or
even death from heat stroke.
Always lock the vehicle whenever
leaving it.
.Outsiders can easily enter
through an unlocked door when
you slow down or stop the(Continued)
Warning (Continued)
vehicle. Locking the doors can
help prevent this from
happening.
To lock or unlock the doors from
outside the vehicle:
.PressQorKon the remote key.
See Remote Keyless Entry (RKE)
System Operation 07.
.Use the mechanical key in the
driver door. The key lock cylinder is
covered with a cap.
See “Driver Door Key Lock Cylinder
Access (In Case of Dead Battery)”
later in this section.
To lock or unlock the doors from
inside the vehicle:
.PressQorKon the power door
lock switch.
.Pull once on the door handle to
unlock the door and again to open
the door. Keyless Access
When the doors are locked and the
remote key is within 1 m (3 ft) of the
driver door handle, press the lock/
unlock button. When unlocking from
the driver door, the first press unlocks
that door; press again within
five seconds to unlock the passenger
door and the trunk. See
Remote
Keyless Entry (RKE) System Operation
0 7.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
KEYS, DOORS, AND WINDOWS 19
Doors
Trunk
{Warning
Exhaust gases can enter the vehicle
if it is driven with the liftgate or
trunk/hatch open, or with any
objects that pass through the seal
between the body and the trunk/
hatch or liftgate. Engine exhaust
contains carbon monoxide (CO)
which cannot be seen or smelled.
It can cause unconsciousness and
even death.
If the vehicle must be driven with
the liftgate or trunk/hatch open:
.Close all of the windows.
.Fully open the air outlets on or
under the instrument panel.
.Adjust the climate control
system to a setting that brings in
only outside air and set the fan
speed to the highest setting. See
“Climate Control Systems”in the
Index.
(Continued)
Warning (Continued)
.If the vehicle is equipped with a
power liftgate, disable the power
liftgate function.
See Engine Exhaust 0226.
Manual Trunk
To release the trunk, the vehicle must
be off or the shift lever must be in
P (Park).
.Press|on the driver door.
.PressXtwice quickly on the
remote key.
.Press the touch pad on the rear of
the trunk above the license plate
when all doors are unlocked.
The trunk can be opened while the
vehicle is locked by pressing the touch
pad above the license plate while the
remote key is within 1 m (3 ft) of the
rear of the vehicle. See Remote Keyless
Entry (RKE) System Operation 07.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
20 KEYS, DOORS, AND WINDOWS
Close the trunk by pulling on the
handle. Do not use the handle as a
tie-down. Do not press the touch pad
while 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, use the
emergency trunk release handle.
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-14584335) -
2021 - CRC - 11/23/20
KEYS, DOORS, AND WINDOWS 21
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, pressQon
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.
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.