2021 CADILLAC CT4 keyless

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
132 LIGHTING
Entry Lighting with Approach
Detection
If equipped with approach detection,
the entry lighting feature will
automatically turn on when the
remote key is detected within
approximately 2 m (6 ft) of the vehicle.
If the vehicle has remained parked for
an extended period of time with no
remote key use or Keyless Access
operation, approach detection will be
disabled. To reactivate, press any
button on the remote key or open and
close all vehicle doors to re-enable the
entry lighting feature on approach.
Approach detection will not work if:
.The vehicle battery is low.
.The ignition is on or in ACC/
ACCESSORY.
.Entry lighting is set to Off. See
“Vehicle Locator Lights”under
Vehicle Personalization 0117.
Approach detection will not work with
a single remote key if:
.The remote key is left within a 5 m
(16 ft) range of the vehicle for
several minutes
.The remote key is left inside the
vehicle and all the doors are closed
To help maximize remote key battery
life, do not store the remote key
within 5 m (16 ft) of the vehicle.
Exit Lighting
Some exterior lamps come on at night,
or in areas with limited lighting, when
the driver door is opened after the
ignition is turned off.
The dome lamp comes on after the
ignition is turned off or any door is
opened. The exterior lamps and dome
lamp remain on after the door is
closed for a set amount of time, then
automatically turn off.
The exterior lamps turn off
immediately by turning the exterior
lamp control off.
The exit lighting for exterior lights can
be changed. See Vehicle Personalization
0 117.
Battery Load Management
The vehicle has Electric Power
Management (EPM), which estimates
the battery's temperature and state of
charge. It then adjusts the voltage for
best performance and extended life of
the battery.
When the battery's state of charge is
low, the voltage is raised slightly to
quickly bring the charge back up.
When the state of charge is high, the
voltage is lowered slightly to prevent
overcharging. If the vehicle has a
voltmeter gauge or a voltage display
on the Driver Information Center
(DIC), you may see the voltage move
up or down. This is normal. If there is
a problem, an alert will be displayed.
The battery can be discharged at idle
if the electrical loads are very high.
This is true for all vehicles. This is
because the generator (alternator)
may not be spinning fast enough at
idle to produce all the power that is
needed for very high electrical loads.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
184 INFOTAINMENT SYSTEM
Delete Profile
Touch to remove the profile from the
vehicle.
Touch Remove or Cancel.
Teen Driver
If equipped, this allows multiple keys
to be registered for beginner drivers to
encourage safe driving habits. When
the vehicle is started with a Teen
Driver key, it will automatically
activate certain safety systems, allow
setting of some features, and limit the
use of others. The Report Card will
record vehicle data about driving
behavior that can be viewed later.
When the vehicle is started with a
registered key, the Driver Information
Center (DIC) displays a message that
Teen Driver is active.
To access:1. Touch Settings on the Home Page, then touch Vehicle, and then Teen
Driver. 2. Create a Personal Identification
Number (PIN) by choosing a
four-digit PIN. Re-enter the PIN to
confirm. To change the PIN, touch
Change PIN.
The PIN is required to:.Register or unregister keys.
.Change Teen Driver settings.
.Change or clear the Teen
Driver PIN.
.Access or delete Report Card data.
Register keys to activate Teen
Driver and assign restrictions to
the key:
Any vehicle key can be registered, up
to a maximum of eight keys. Label the
key to tell it apart from the
other keys.
For a pushbutton start system: 1. Start the engine.
2. For automatic transmissions, the vehicle must be in P (Park). For
manual transmissions, the vehicle
must be stopped with the parking
brake set.
3. From the Settings menu, touch Vehicle and then Teen Driver. 4. Enter the PIN.
5. Place the remote key you wish to
register in the rear cupholder. The
key does not need to be the one
that started the vehicle. See Remote
Keyless Entry (RKE) System
Operation 07for rear cupholder
location.
6. From the Teen Driver menu, touch Setup Keys..If the transmitter key has not
previously been registered, the
option to add the key displays.
Touch Setup and a confirmation
message displays. Teen Driver
restrictions will be applied
whenever this key is used to
operate the vehicle.
.If the transmitter key has
already been registered, the
option to remove the key
displays. If Remove is touched,
the transmitter key is no longer
registered. A confirmation
message displays, and Teen
Driver restrictions will not be
applied if this transmitter key is
used to operate the vehicle.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 219
Ignition Positions
The vehicle has an electronic keyless
ignition with pushbutton start.
The remote key must be in the vehicle
for the system to operate. If the
pushbutton start is not working, the
vehicle may be near a strong radio
antenna signal causing interference to
the Keyless Access system. SeeRemote
Keyless Entry (RKE) System Operation
0 7.
To shift out of P (Park), the vehicle
must be on, and the brake pedal must
be applied. Stopping the Engine/OFF (No
Indicator Lights) :
When the vehicle
is stopped, press ENGINE START/
STOP once to turn the engine off.
If the vehicle is in P (Park), the
ignition will turn off, and Retained
Accessory Power (RAP) will remain
active. See Retained Accessory Power
(RAP) 0223.
If the vehicle is not in P (Park), the
ignition will return to ACC/
ACCESSORY and display a message in
the Driver Information Center (DIC).
When the vehicle is shifted into
P (Park), the ignition system will
switch to OFF.
The vehicle may have an electric
steering column lock. The lock is
activated when the vehicle is switched
to OFF and the driver door is opened.
A sound may be heard as the lock
actuates or releases. The steering
column lock may not release with the
wheels turned off center. If this
happens, the vehicle may not start.
Move the steering wheel from left to
right while attempting to start the
vehicle. If this does not work, the
vehicle needs service. Do not turn the engine off when the
vehicle is moving. This will cause a
loss of power assist in the brake and
steering systems and disable the
airbags.
If the vehicle must be shut off in an
emergency:
1. Brake using a firm and steady pressure. Do not pump the brakes
repeatedly. This may deplete power
assist, requiring increased brake
pedal force.
2. Shift the vehicle to N (Neutral). This can be done while the vehicle
is moving. After shifting to
N (Neutral), firmly apply the brakes
and steer the vehicle to a safe
location.
3. Come to a complete stop, shift to P (Park), and turn the ignition to
OFF. On vehicles with an automatic
transmission, the shift lever must
be in P (Park) to turn the ignition
switch to the OFF position.
4. Set the parking brake. See Electric
Parking Brake 0237.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 221
If the remote key is not in the
vehicle, if there is interference, or if
the remote key battery is low, a
Driver Information Center (DIC)
message will display. SeeRemote
Keyless Entry (RKE) System
Operation 07.
Caution
Cranking the engine for long
periods of time, by pressing
ENGINE START/STOP immediately
after cranking has ended, can
overheat and damage the cranking
motor, and drain the battery. Wait
at least 15 seconds between each
try, to let the cranking motor
cool down.
2. If the engine does not start after five to 10 seconds, especially in
very cold weather (below −18 °C or
0 °F), it could be flooded with too
much gasoline. Try pushing the
accelerator pedal all the way to the
floor and hold it there, then press
ENGINE START/STOP for up to a
maximum of 15 seconds. Wait at
least 15 seconds between each try,
to allow the cranking motor to cool down. When the engine starts, let
go of the button and the
accelerator. If the vehicle starts
briefly but then stops again, do the
same thing. This clears the extra
gasoline from the engine. Do not
race the engine immediately after
starting it. Operate the engine and
transmission gently until the oil
warms up and lubricates all
moving parts.
Stopping the Engine
Move the shift lever to P (Park) and
press and hold ENGINE START/STOP
on the instrument panel, until the
engine shuts off. If the shift lever is
not in P (Park), the engine shuts off
and the ignition goes to ACC/
ACCESSORY. The DIC displays SHIFT
TO PARK. Once the shift lever is
moved to P (Park), the vehicle
turns off.
If the remote key is not detected
inside the vehicle when it is turned off
the DIC displays a message.
Stop/Start System
The Stop/Start system will shut off
the engine to help conserve fuel.
It has components designed for the
increased number of starts.
{Warning
The automatic engine Stop/Start
feature causes the engine to shut
off while the vehicle is still on. Do
not exit the vehicle before shifting
to P (Park). The vehicle may restart
and move unexpectedly. Always
shift to P (Park), and then turn the
ignition off before exiting the
vehicle.
Auto Engine Stop/Start
When the brakes are applied and the
vehicle is at a complete stop, the
engine may turn off. When stopped,
the tachometer displays AUTO STOP.
See Tachometer 093. When the brake
pedal is released or the accelerator
pedal is pressed, the engine will
restart.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
426 INDEX
Headlamps (cont'd)High/Low Beam Changer . . . . . . . . . 128
Lamps On Reminder . . . . . . . . . . . . . . 106
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . . 82
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 25
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
High-Beam On Light . . . . . . . . . . . . . . . . 105
High-Speed Operation . . . . . . . . . . . . . . 347
Hill and Mountain Roads . . . . . . . . . . 212
Hill Start Assist (HSA) . . . . . . . . . . . . . 238
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
How to Wear Seat Belts Properly . . . 42
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
I
If the System Needs Service . . . . . . . 163
Ignition Positions . . . . . . . . . . . . . . . . . . . 219
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Indicator Pedestrian Ahead . . . . . . . . . . . . . . . . . 102
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . 102 Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Information Publication Ordering . . . . . . . . . . . . . 408
Infotainment System . . . . . . . . . . . . . . . 412
Instrument Cluster . . . . . . . . . . . . . . 88, 90
Instrument Panel Overview . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . 26
Introduction . . . . . . . . . . . . . . . . . . . . . . 1, 134
J
Jump Starting - North America . . . . 366
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . 7
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 342
Lamps
Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Daytime Running (DRL) . . . . . . . . . . 128
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Exterior Controls . . . . . . . . . . . . . . . . . . 126
Exterior Lamps Off Reminder . . . . 128
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 Lamps (cont'd)
Front Turn Signal . . . . . . . . . . . . . . . . . 330
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
On Reminder . . . . . . . . . . . . . . . . . . . . . . 106
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Lane Change Alert (LCA) . . . . . . . . . . . 289
Lane Keep Assist (LKA) . . . . . . . . . . . . 291
Lane Keep Assist Light . . . . . . . . . . . . . 101
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 44
LATCH System Replacing Parts after a Crash . . . . . 72
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . 65
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 330
Light Performance Shifting . . . . . . . . . . . . . 101
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Illumination Control . . . . . . . . . . . . . . 130
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . 96
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . 100
Automatic Vehicle Hold . . . . . . . . . . 101
Brake System Warning . . . . . . . . . . . . 99

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INDEX 429
Publication OrderingInformation . . . . . . . . . . . . . . . . . . . . . . . . 408
R
Radio
HD Radio Technology . . . . . . . . . . . . 143
Radio Data System (RDS) . . . . . . . . . . 143
Radio Frequency Statement . . . . . . . . 409
Radio Reception . . . . . . . . . . . . . . . . . . . . 144
Radios
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . 141
Satellite . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Reading Lamps . . . . . . . . . . . . . . . . . . . . . 131
Rear Pedestrian Alert . . . . . . . . . . . . . . . 282
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Rear Vision Camera (RVC) . . . . . . . . . 277
Rearview Mirrors . . . . . . . . . . . . . . . . . . . . 26 Automatic Dimming . . . . . . . . . . . . . . . 26
Reclining Seatbacks . . . . . . . . . . . . . . . . . 33
Recognition Voice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Recommended Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 293, 294
Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . 391
Records
Maintenance . . . . . . . . . . . . . . . . . . . . . . 394
Recreational Vehicle Towing . . . . . . . 370 Reimbursement Program, GM
Mobility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402
Remote Keyless Entry (RKE) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote Vehicle Start . . . . . . . . . . . . . . . . 13
Replacement Parts Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Maintenance . . . . . . . . . . . . . . . . . . . . . . 392
Replacing Airbag System . . . . . . . . . . . . 59
Replacing LATCH System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . 72
Replacing Seat Belt System Parts after a Crash . . . . . . . . . . . . . . . . . 47
Reporting Safety Defects Canadian Government . . . . . . . . . . . . 409
General Motors . . . . . . . . . . . . . . . . . . . 410
U.S. Government . . . . . . . . . . . . . . . . . . 409
Restraints Where to Put . . . . . . . . . . . . . . . . . . . . . . . 64
Retained Accessory Power (RAP) . . . . . . . . . . . . . . . . . . . . . . . 223
Reverse Tilt Mirrors . . . . . . . . . . . . . . . . . 25
Ride Control Systems Enhanced TractionSystem (ETS) . . . . . . . . . . . . . . . . . . . . 248
Roads Driving, Wet . . . . . . . . . . . . . . . . . . . . . . . 211
Roadside Service . . . . . . . . . . . . . . . . . . . . 403 Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Rotation, Tires . . . . . . . . . . . . . . . . . . . . . . 352
Routing, Engine Drive Belt . . . . . . . . . 398
Run-Flat Tires . . . . . . . . . . . . . . . . . . . . . . . 340
Running the Vehicle While Parked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
S
Safety Defects Reporting
Canadian Government . . . . . . . . . . . . 409
General Motors . . . . . . . . . . . . . . . . . . . 410
U.S. Government . . . . . . . . . . . . . . . . . . 409
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Safety System Check . . . . . . . . . . . . . . . . 47
Satellite Radio . . . . . . . . . . . . . . . . . . . . . . 144
Scheduling Appointments . . . . . . . . . . 405
Sealant Kit, Tire . . . . . . . . . . . . . . . . . . . . . 360
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Buckle To Drive . . . . . . . . . . . . . . . . . . . . 41
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Extender . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
How to Wear Seat BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . 44
Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Replacing after a Crash . . . . . . . . . . . . 47
Use During Pregnancy . . . . . . . . . . . . . 46