key battery CADILLAC CT4 2023 Owners Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 9
The mechanical key, inside the
remote key, is used for the
driver door and glove box.To remove the mechanical key,
press the button on the side
of the remote key near the
bottom, and pull the
mechanical key out. Never pull
the mechanical key out
without pressing the button.
If it becomes difficult to turn
the key, inspect the key blade
for debris. Periodically clean
with a brush or pick.
See your dealer if a new
mechanical key is needed.
Contact Roadside Assistance
if locked out of the vehicle.
See Roadside Assistance
Program
0487.
With an active OnStar or
connected service plan, an
OnStar Advisor may remotely
unlock the vehicle. See OnStar
Overview 0499.
Remote Key
See Radio Frequency
Statement 0494. If there is a decrease in the
remote key operating range:
.Check the distance. The
remote key may be too far
from the vehicle.
.Check the location. Other
vehicles or objects may be
blocking the signal.
.Check the remote key
battery. See
“Battery
Replacement” later in this
section.
.If the remote key is still not
working correctly, see your
dealer or a qualified
technician for service.
Remote Key
Operation
The Keyless Access system
allows for vehicle entry when
the remote key is within 1 m
(3 ft). See “Keyless Access
Operation” later in this section.
The remote key functions may
work up to 60 m (197 ft) away
from the vehicle.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
14 Keys, Doors, and Windows
Mechanical Key Access
To access a vehicle with a
weak remote key battery, see
Door Locks018.
Programming Remote
Keys to the Vehicle
Only remote keys programmed
to the vehicle will work. If a
remote key is lost or stolen, a
replacement can be purchased
and programmed through your
dealer. The vehicle can be
reprogrammed so that lost or
stolen remote keys no longer
work. Each vehicle can have
up to eight remote keys
matched to it.
Starting the Vehicle with a
Low Remote Key Battery
For improved vehicle security,
the remote key is equipped
with a motion sensor. When
starting the vehicle, if the
remote key has been idle for a
while, the DIC may display KEY
IN SLEEP MODE, MOVE KEY,
THEN START. Move the remote key slightly and try
starting the vehicle. When
starting the vehicle, if the
remote key battery is depleted
or there is signal interference,
the DIC may display NO KEY
FOUND, REPLACE BATTERY
IN KEY or NO REMOTE KEY
WAS DETECTED PLACE KEY
IN KEY POCKET THEN START
YOUR VEHICLE, follow the
steps shown below:
1. Place the remote key into
the rear cupholder. 2. With the vehicle in P (Park)
or N (Neutral) press the
brake pedal and ENGINE
START/STOP.
Replace the remote key
battery as soon as
possible.
Battery Replacement
{Warning
Never allow children to play
with the remote key. The
remote key contains a small
battery, which can be a
choking hazard. If swallowed,
internal burns can occur,
resulting in severe injury or
death. Seek medical
attention immediately if a
battery is swallowed.
{Warning
To avoid personal injury, do
not touch metal surfaces on
the remote key when it has
been exposed to extreme
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 15
Warning (Continued)
heat. These surfaces can be
hot to the touch at
temperatures above 59 °C
(138 °F).
Caution
When replacing the battery,
do not touch any of the
circuitry on the remote key.
Static from your body could
damage the remote key.
Caution
Always replace the battery
with the correct type.
Replacing the battery with
an incorrect type could
potentially create a risk of
battery explosion. Dispose
of used batteries according
to instructions and local
laws. Do not attempt to
burn, crush, or cut the used
battery, and avoid exposing(Continued)
Caution (Continued)
the battery to environments
with extremely low air
pressures or high
temperatures.
Caution
If the remote key is not
reassembled properly,
liquids could enter the
housing and damage the
circuitry, resulting in a
remote key malfunction
and/or failure. To prevent
damage, always follow the
steps for remote key
reassembly in this manual to
ensure the remote key is
sealed properly whenever
the remote key is opened.
Replace the battery if the DIC
displays REPLACE BATTERY
IN KEY.
1. Press the button on the side of the remote key and
pull the mechanical key
out. Never pull the
mechanical key out without
pressing the button.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
16 Keys, Doors, and Windows
2. Use the mechanical keyblade in the slot to remove
the battery cover by hand.
3. Remove the seal by pullingon the tab to access the
battery.
4. Remove the old battery. Do not use a metal object.
5. Insert the new battery, positive side toward the
back cover. Replace with a
CR2450 or equivalent
battery.
6. Place the seal back into the groove around the
battery compartment.
7. Reassemble the battery cover by snapping it back
on the remote key.
8. Reinsert the mechanical key.
Remote Vehicle Start
This feature allows the engine
to be started from outside the
vehicle. It is not available on
vehicles with a manual
transmission.
S:This button on the remote
key is for remote start. The climate control system will
use the previous settings
during a remote start. The
rear window defogger may
come on during remote start
based on cold ambient
conditions. The rear defog
indicator light does not come
on during remote start.
If equipped, the heated and
ventilated front seats may
also come on when the vehicle
personalization setting is
enabled. See Heated and
Ventilated Front Seats
045.
If equipped with a remote
start heated steering wheel, it
may come on during a remote
start. See Heated Steering
Wheel 098.
Laws in some local
communities may restrict the
use of remote starters. For
example, some laws may
require a person using remote
start to have the vehicle in
view. Check local regulations
for any requirements.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
18 Keys, Doors, and Windows
.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.
.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(Continued)
Warning (Continued)
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 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 Key
Operation 09.
.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.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/4/22
Keys, Doors, and Windows 19
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 Key
Operation09. 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-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
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 33
Programming the Power
Windows
Programming may be
necessary if the vehicle
battery has been
disconnected or discharged.
If the window is unable to
express-up, program each
express-close window:1. Close all doors.
2. Turn the ignition on or to accessory mode.
3. Partially open the window to be programmed. Then
close it and continue to pull
the switch briefly after the
window has fully closed.
4. Open the window and continue to press the
switch briefly after the
window has fully opened.
Remote Window
Operation
If enabled through vehicle
settings, this feature allows all
side windows to be opened
remotely. To open, double
press and hold
Kon the
remote key.
If equipped, all windows can
also be closed using the
remote key. To close, double
press and hold
Qon the
remote key.
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”.
Sun Visors
Pull the sun visor down to
block glare. Detach the sun
visor from the center mount to
pivot to the side window and,
if equipped, extend along
the rod.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-16500442) -
2023 - CRC - 5/10/22
Driving and Operating 241
the pads, or any other work.
The battery must be
disconnected to prevent the
brake master cylinder from
pressurizing the hydraulic
system during its automated
self diagnostic tests that may
occur when a door is opened
or the remote key is present.
{Warning
To avoid personal injury and/
or vehicle damage, always
disconnect the battery
before performing service
work on the hydraulic brake
system. Bleeding the brake
system with the battery
connected can lead to
excessive pressurization of
the system during automatic
diagnostic tests or diagnosis
of a leak or air in the braking
system. A Diagnostic
Trouble Code (DTC) may set
and vehicle speed may be
limited.Brake Cooling (V-Series
Blackwing)
Prior to any track event, high
speed driving event,
or competitive driving,
complete the following:
1. Ensure all the brake cooling parts are correctly
secured and installed.
2. Inspect and replace any deflectors that have
damage.
3. Inspect for blockage in the front brake cooling duct
prior to every event.
If improved brake cooling is
desired, install the ball joint
protector front shields,
remove both upper and lower
rear rotor shields, and install
the rear lower control arm
cooling deflectors, per the
instructions included with the
brake cooling kit. These parts
are for track use only. After
track events reinstall original
front and rear rotor shields,
and remove rear lower control
arm cooling deflectors.Right Side Front Shown, Left Side Front Similar
1. Front Lower Control Arm Deflector