key CADILLAC CT4 2020 User Guide

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
16 KEYS, DOORS, AND WINDOWS
Conditions in Which Remote Start
Will Not Work
The remote start will not operate if
any of the following occur:
.The ignition is in any mode other
than off.
. A remote key is in the vehicle.
. The hood is not closed.
. The hazard warning flashers
are on.
. There is an emission control
system malfunction.
. The engine coolant temperature is
too high.
. The oil pressure is low.
. The 30 minutes of engine run time
have been used.
. The vehicle is not in P (Park).
Door Locks
{Warning
Unlocked doors can be dangerous.
(Continued)
Warning (Continued)
.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
(Continued)
Warning (Continued)
the vehicle. Locking the doors
can help prevent this from
happening.
To lock or unlock the doors from
outside the vehicle:
. Press
QorKon the remote key.
See Remote Keyless Entry (RKE)
System Operation 08.
. 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:
. Press
QorKon the power door
lock switch.
. Pull once on the door handle to
unlock the door and again to open
the door.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
KEYS, DOORS, AND WINDOWS 17
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. SeeRemote
Keyless Entry (RKE) System Operation
0 8. Driver Door Key Lock Cylinder
Access (In Case of Dead Battery)To access the driver door key lock
cylinder:
1. Pull the door handle (1) to the open position and hold it open
until the cap removal is
complete.
2. Insert the mechanical key into the slot (3) on the bottom of the
cap (2) and lift the mechanical
key upward.
3. Move the cap (2) rearward and remove. 4. Use the mechanical key in the
cylinder.
To replace the cap: 1. Pull the door handle (1) to the open position and hold it open
until the cap installation is
complete.
2. Insert the two tabs (6) at the
back of the cap between the
seal (5) and the metal base (4).

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
18 KEYS, DOORS, AND WINDOWS
3. Slide the cap forward and pressthe forward edge to install the
cap in place.
4. Release the door handle. 5. Check that the cap is secure.
Free-Turning Locks
The door key lock cylinder turns freely
when either the wrong mechanical key
is used, or the correct mechanical key
is not fully inserted. The free-turning
door lock feature prevents the lock
from being forced open. To reset the
lock, turn it to the vertical position
with the correct mechanical key fully
inserted. Remove the mechanical key
and insert it again. If this does not
reset the lock, turn the mechanical
key halfway around in the cylinder
and repeat the reset procedure.
Power Door Locks
Q: Press to lock the doors. The
indicator light in the switch will
illuminate when locked.
K: Press to unlock the doors.
Delayed Locking
This feature delays the actual locking
of the doors until five seconds after all
doors are closed.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
KEYS, DOORS, AND WINDOWS 19
WhenQis pressed on the power door
lock switch with the door open, a
chime will sound three times
indicating that delayed locking is
active.
The doors will then lock automatically
five seconds after all doors are closed.
If a door is reopened before
five seconds have elapsed, the
five-second timer will reset once all
the doors are closed again.
Press
Qon the door lock switch again,
or press
Qon the key, to override this
feature and lock the doors
immediately.
Delayed locking can be programmed.
See Vehicle Personalization 0116.
Automatic Door Locks
The doors will lock automatically
when all doors are closed, the ignition
is on, and the vehicle is shifted out of
P (Park). If a vehicle door is unlocked, and then
opened and closed, the doors will lock
either when your foot is removed from
the brake or the vehicle speed
becomes faster than 13 km/h (8 mph).
To unlock the doors:
.
Press
Kon the power door lock
switch.
. Shift the transmission into
P (Park).
Automatic door locking cannot be
disabled. Automatic door unlocking
can be programmed. See Vehicle
Personalization 0116.
Lockout Protection
If the vehicle is on or in ACC/
ACCESSORY and the power door lock
switch is pressed with the driver door
open, all the doors will lock and only
the driver door will unlock.
If the vehicle is off and locking is
requested while a door is open, when
all doors are closed the vehicle will
check for keys inside. If any remote
key programmed to the vehicle is
detected and the number of keys inside has not reduced, the driver door
will unlock and the horn will chirp
three times.
Lockout Protection can be manually
overridden with the driver door open
by pressing and holding
Qon the
power door lock switch.
Safety Locks
With Folding Mirrors

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
20 KEYS, DOORS, AND WINDOWS
Without Folding Mirrors
The rear door safety locks prevent
passengers from opening the rear
doors from inside the vehicle.
Press
{ vto activate the safety locks
on the rear doors. The indicator light
in the switch will illuminate when
activated.
The rear door power windows are also
disabled. See Power Windows 029.
Press
{ vagain to deactivate the
safety locks.
If an inside rear door handle is being
pulled at the same time the safety
lock is deactivated, only that door will remain locked and the indicator light
may flash. Release the handle, then
press the safety lock twice to
deactivate the safety locks.
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
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
KEYS, DOORS, AND WINDOWS 21
Warning (Continued)
set the fan speed to the
highest setting. See“Climate
Control Systems” in the Index.
. If the vehicle is equipped with
a power liftgate, disable the
power liftgate function.
See Engine Exhaust 0168.
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.
. Press
Xtwice 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 08.
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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
22 KEYS, DOORS, AND WINDOWS
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.
After pulling the emergency trunk
release handle, push the handle back
into the bezel.
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.
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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
KEYS, DOORS, AND WINDOWS 23
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
Q
on 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:
. Press
Kon 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.
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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
24 KEYS, DOORS, AND WINDOWS
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.
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 0330.
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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
KEYS, DOORS, AND WINDOWS 25
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
Operation08.
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 Keyless Entry
(RKE) System Operation 08.
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.