2021 CADILLAC CT4 climate control

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 119
Auto Rear Defog
This setting automatically turns the
rear defogger on when the engine is
started.
Touch Off or On.
Ionizer
If equipped and on, this feature helps
clean the air inside the vehicle and
remove contaminants such as pollen,
odors, and dust. SeeDual Automatic
Climate Control System 0196.
Touch Off or On.
Collision / Detection Systems
Touch and the following may display:
.Alert Type
.Forward Collision System
.Front Pedestrian Detection
.Adaptive Cruise Go Notifier
.Lane Change Alert
.Rear Camera Park Assist Symbols
.Rear Cross Traffic Alert
.Super Cruise Lane Change Alert Type
This setting specifies the type of
vehicle feedback provided, either a
beep or seat vibration, when you are
in danger of colliding with an object.
Touch Beeps or Safety Alert Seat.
Forward Collision System
This setting can alert of a potential
crash with a detected vehicle ahead
and can apply brakes to help reduce a
collision’s severity.
Touch Off, Alert, or Alert and Brake.
Front Pedestrian Detection
This feature may help avoid or reduce
the harm caused by front-end crashes
with nearby pedestrians.
See
Front Pedestrian Braking (FPB)
System 0287.
Touch Off, Alert, or Alert and Brake.
Adaptive Cruise Go Notifier
This setting determines if an alert will
appear when Adaptive Cruise Control
brings the vehicle to a complete stop
and the vehicle ahead of you starts
moving again. See Adaptive Cruise
Control (Advanced) 0251. Touch Off or On.
Lane Change Alert
This setting specifies if an alert will
display on the outside mirror to help
you avoid crashing into a vehicle in
your blind spot, or rapidly
approaching your blind spot, during a
lane change maneuver. See
Lane
Change Alert (LCA) 0289.
Touch Off or On.
Rear Camera Park Assist Symbols
This setting enables the Rear Camera
Park Assist Symbols. See Assistance
Systems for Parking or Backing 0277.
Touch Off or On.
Rear Cross Traffic Alert
This setting specifies if an alert will
display when the vehicle detects
approaching rear cross traffic when in
R (Reverse). See Assistance Systems for
Parking or Backing 0277.
Touch Off or On.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
LIGHTING 133
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, fog lamps,
rear window defogger, climate control
fan at high speed, heated seats, engine
cooling fans, and loads plugged into
accessory power outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator's output
and the vehicle's electrical needs.
It can increase engine idle speed to
generate more power, whenever
needed. It can temporarily reduce the
power demands of some accessories.
Normally, these actions occur in steps
or levels, without being noticeable. In
rare cases at the highest levels of
corrective action, this action may be
noticeable to the driver. If so, a DIC
message might be displayed. If a
battery message is displayed, it is
recommended that the driver reduce
the electrical loads as much as
possible. SeeDriver Information Center
(DIC) (Base Level) 0107 or
Driver Information Center (DIC)
(Uplevel) 0110.Battery Power Protection
The battery saver feature is designed
to protect the vehicle's battery.
If some interior lamps are left on and
the ignition is turned off, the battery
rundown protection system
automatically turns the lamp off after
some time.
Exterior Lighting Battery
Saver
The exterior lamps turn off about
10 minutes after the ignition is turned
off, if the parking lamps or headlamps
have been manually left on. This
protects against draining the battery.
To restart the 10-minute timer, turn
the exterior lamp control to the
O
position and then back to the;or
2position.
To keep the lamps on for more than
10 minutes, the ignition must be on or
in ACC/ACCESSORY.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
138 INFOTAINMENT SYSTEM
Phone
Touch the Phone icon to display the
Phone main page. SeeBluetooth
(Overview) 0169 or
Bluetooth (Pairing and Using a Phone)
0 170.
Nav
If equipped, touch the Nav icon to
display the navigation map. See Using
the Navigation System 0150.
Wi-Fi Hotspot
Touch the Wi-Fi Hotspot icon to
display the Wi-Fi Hotspot information.
See Settings 0176.
Climate
Touch the Climate icon to display the
Climate main page. See Dual
Automatic Climate Control System
0 196.
Users
If equipped, touch the Users icon to
sign in or create a new user profile,
and follow the on-screen instructions. Only four user profiles can be active at
one time in the vehicle. It may be
necessary to remove a profile from the
menu before creating or signing into
an existing profile. The removed
profile can be logged into at a
later time.
Settings
Touch the Settings icon to display the
Settings menu. See
Settings0176.
Apple CarPlay
Touch the Apple CarPlay icon to
activate Apple CarPlay if equipped
after a supported device is connected.
See Apple CarPlay and Android Auto
0 174.
Android Auto
Touch the Android Auto icon to
activate Android Auto, if equipped,
after a supported device is connected.
See Apple CarPlay and Android Auto
0 174.
Apps
If equipped, in-vehicle apps are
available for download. Touch the
Apps icon on the Home Page to begin. Downloading and using in-vehicle
apps requires Internet connectivity
which can be accessed with a data
plan through the vehicle’s built-in
4G LTE Wi-Fi hotspot, if equipped,
or a compatible mobile device hotspot.
On most mobile devices, activation of
the Wi-Fi hotspot is in the device’s
Settings menu under Mobile Network
Sharing, Personal Hotspot, Mobile
Hotspot, or similar.
Availability of apps and connectivity
varies by vehicle, conditions, and
location. Data plan rates apply.
Features are subject to change. For
more information, see
www.my.cadillac.com/learn.
OnStar Services
If equipped, touch the OnStar Services
icon to display the OnStar Services
and Account pages. See
OnStar
Overview 0413 and
OnStar System 0149.
Camera
If equipped, touch the Camera icon to
access the camera application. See
Assistance Systems for Parking or
Backing 0277.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INFOTAINMENT SYSTEM 181
Apps
Touch and the following may display:
.Update Apps Automatically: This
allows downloaded applications to
be updated automatically.
Touch the controls on the
infotainment display to disable or
enable.
.About Apps: Touch to view the
versions of the apps software.
Audio
Depending on the current audio
source, different options will be
available.
Touch and the following may display:
.Tone Settings: Touch to adjust
Equalizer, Fade/Balance, or Sound
Mode. See “Infotainment System
Sound Menu ”in AM-FM Radio
0 141.
.Adaptive Volume: This feature
adjusts the volume based on the
vehicle speed.
Touch Off, Low, Medium-Low,
Medium, Medium-High, or High.
.Bose AudioPilot Noise
Compensation Technology (If
Equipped): This feature adjusts the
volume based on the noise in the
vehicle and the speed.
Touch Off or On.
.Manage Favorites: Touch to display
a list of Audio, Mobile Devices, and
Navigation favorites.
Favorites can be moved, renamed,
or deleted.
To move, touch and hold the
favorite, and then drag up or down
to rearrange the position.
.Set Number of Audio Favorites:
Touch to select how many favorites
pages can be viewed from the audio
application. The Auto setting will
automatically adjust this number
based on the number of favorites
you have saved. Touch Auto, 5, 10,
15, 20, 25, 30, 35, or 40.
.RDS: This allows the Radio Data
System (RDS) to be turned on or off.
Touch the controls on the
infotainment display to disable or
enable.
.HD Radio: This allows HD Radio
reception to be turned on or off.
Touch the controls on the
infotainment display to disable or
enable.
.Explicit Content Filter: This setting
allows access to explicit content
SiriusXM channels.
Touch Off or On.
.Manage Phones: Select to connect
to a different phone source,
disconnect a phone, or delete a
phone.
.Reset Music Index: This allows the
music index to be reset if you are
having difficulty accessing all of the
media content on your device.
Touch Yes or No.
Climate
Touch and the following may display:
.Auto Fan Speed: This setting
specifies the amount of airflow
when the climate control fan setting
is Auto Fan.
Touch Low, Medium, or High.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
196 CLIMATE CONTROLS
Climate Controls
Climate Control Systems
Dual Automatic Climate ControlSystem . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Maintenance
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Climate Control Systems
Dual Automatic Climate Control System
The climate control buttons on the center stack and on the climate control
display are used to adjust the heating, cooling, and ventilation system. Center
Stack Climate Controls
1. ON/OFF (Power)
2. AUTO (Automatic Operation)
3. Air Delivery Mode Control
4. Driver Temperature Controls
5. Fan Control
6. Passenger Temperature Controls7. A/C (Air Conditioning)
8. Recirculation
9. SYNC (Synchronized Temperature)
10. Defrost
11. Rear Window Defogger

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
CLIMATE CONTROLS 197
Climate Control Display
1. Driver and Passenger TemperatureDisplays
2. Fan Control
3. Driver and Passenger Temperature Controls
4. Sync (Synchronized Temperature)
5. Recirculation
6. Air Delivery Mode Control
7. Auto (Automatic Operation)
8. A/C (Air Conditioning)
9. On/Off (Power) The fan speed, air delivery mode, air
conditioning, driver and passenger
temperatures, recirculation, and Sync
settings can be controlled by touching
CLIMATE icon on the infotainment
Home Page or the climate button in
the application tray. A selection can
then be made on the front climate
control page displayed. See the
infotainment manual.
Climate Control Status Display
The climate control status display
appears briefly when the center stack
climate controls are adjusted.
Climate Control Influence on
Fuel Economy
The climate control system depends
on other vehicle systems for heat and
power input. Certain climate control
settings can lead to higher fuel usage.
The following climate control settings
use more fuel:
.MAX air conditioning mode
.Defrost mode
.Extreme temperature settings, such
as 15° C (60° F) or 32° C (90° F)
.High fan speed settings
To help reduce fuel usage:
.Use the full automatic control as
described under “Automatic
Operation.”
.Select a temperature setting that is
higher in hot weather and lower in
cold weather.
.Turn off the air conditioning when
it is not needed.
.Only use defrost to clear the
windows.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
198 CLIMATE CONTROLS
Automatic Operation
The system automatically controls the
following four functions to heat or
cool the vehicle to the desired
temperature:
.Fan Speed
.Air Delivery Mode
.Air Conditioning
.Recirculation
When the AUTO indicator light is lit,
all four functions are operating
automatically. Each function can be
manually set and the selected setting
will be shown. This cancels full
automatic operation and the AUTO
indicator light turns off. Functions
that are not manually set will
continue to be automatically
controlled, although the AUTO
indicator light will not be lit.
To place the system in
automatic mode: 1. Press AUTO.
2. Set the driver and passenger temperature. To find your comfort setting, start
with 22 °C (72 °F) and allow the
system time to stabilize. Then
adjust the temperature as needed
for best comfort.
To improve fuel efficiency and to cool
the vehicle faster, recirculation may be
automatically selected in warm
weather.
The recirculation light will not come
on when automatically controlled.
Press
@to manually select
recirculation; press it again to select
outside air.
Do not cover the solar sensor on the
top of the instrument panel near the
windshield. This sensor regulates air
temperature based on sun load. See
“Sensors ”later in this section.
Manual Operation
On/Off : Press to turn the climate
control system on or off. When the
system is off, outside air will be
prevented from entering the vehicle.
When the system is on or a button is
pressed, the climate control system
will turn on and deliver airf low per
the current setting.
9: Press button up or down to
increase or decrease the fan speed.
Press AUTO to return to automatic
operation.
Driver and Passenger Temperature
Control : The temperature can be
adjusted separately for the driver and
passenger.
Press button up or down to increase
or decrease the driver or passenger
temperature setting.
The driver side or passenger side
temperature display shows the
temperature setting increasing or
decreasing.
SYNC : Press to link the passenger
and rear climate temperature settings,
if equipped, to the driver setting. The
SYNC indicator light will turn on.
When the passenger or rear climate
temperature settings are adjusted, the
SYNC indicator light is off.
Air Delivery Mode Control : Press
Y,
[, orzto change the direction of
the airf low. An indicator light comes

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
CLIMATE CONTROLS 199
on in the selected mode button.
Multiple buttons can be selected
simultaneously.
Changing the mode cancels the
automatic operation and the system
goes into manual mode. Press AUTO
to return to automatic operation.
z:This mode clears the windows of
fog or moisture. Air is directed to the
windshield and side window vents.
The system automatically forces
outside air into the vehicle and the air
conditioning compressor will run,
unless the outside temperature is
close to freezing.
Y: Air is directed to the instrument
panel outlets.
[: Air is directed to the floor
outlets, with some to the windshield,
side window outlets, outboard panel
outlets, and second row floor outlets.
0: Press to clear the windshield of
fog or frost more quickly. Air is
directed to the windshield and the
side window outlets. The air conditioning compressor also comes
on, unless the outside temperature is
below freezing.
Do not drive the vehicle until all
windows are clear.
See
Air Vents 0200.
A/C : Press to turn the air
conditioning system on or off. An
indicator light comes on to show that
the air conditioning is enabled. If the
fan is turned off, the air conditioner
will not run. The A/C light will stay on
even if the outside temperatures are
below freezing.
@: Press to turn on recirculation.
An indicator light comes on. Air is
recirculated to quickly cool the inside
of the vehicle. It can also be used to
help reduce outside air and odors that
enter the vehicle. The air conditioning
compressor also comes on when this
mode is activated.
Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
K: Press to turn the rear window
defogger on or off. An indicator light
on the button comes on to show that
the rear window defogger is on.
The rear window defogger only works
when the ignition is on. The defogger
turns off if the ignition is turned to
off or ACC/ACCESSORY.
Caution
Using a razor blade or sharp object
to clear the inside rear window can
damage the rear window defogger.
Repairs would not be covered by
the vehicle warranty. Do not clear
the inside rear window with sharp
objects.
Heated Mirror : If equipped with
heated outside mirrors, the mirrors
heat to help clear fog or frost from the
surface of the mirror when the rear
window defog button is pressed. See
Heated Mirrors 025.
Remote Start Climate Control
Operation : If equipped with remote
start, the climate control system may
run when the vehicle is started
remotely. The rear defog may come on