service CADILLAC CT4 2021 Owner's Guide

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 105
This light should come on briefly as
the engine is started. If it does not
come on, have the vehicle serviced by
your dealer.
If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle could
be low on oil and might have some
other system problem. See your dealer.
Low Fuel Warning Light
A Low Fuel Warning Light near the
fuel gauge comes on briefly when the
ignition is turned on as a check to
show it is working.It also comes on when the fuel gauge
indicator nears empty. The light turns
off when fuel is added. If it does not,
have the vehicle serviced.
Security Light
The security light should come on
briefly as the engine is started. If it
does not come on, have the vehicle
serviced by your dealer. If the system
is working normally, the indicator
light turns off.
If the light stays on and the engine
does not start, there could be a
problem with the theft-deterrent
system. See
Immobilizer Operation
0 23.
High-Beam On Light
This light comes on when the
high-beam headlamps are in use. See
Headlamp High/Low-Beam Changer
0128.
IntelliBeam Light
This light comes on when the
IntelliBeam system, if equipped, is
enabled. See Exterior Lamp Controls
0 126.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
116 INSTRUMENTS AND CONTROLS
Navigation Overlay :This displays
digital speed for Tour/ Sport, current
gear for Track, indicators from speed
view along with Turn-by-Turn
Navigation information in some
vehicles. The compass heading is
displayed when navigation routing is
not active.
Navigation Turn-by-Turn Alerts
shown in the instrument cluster may
also be displayed in any HUD view.
Care of the HUD
Clean the inside of the windshield to
remove any dirt or film that could
reduce the sharpness or clarity of the
HUD image.
Clean the HUD lens with a soft cloth
sprayed with glass cleaner. Wipe the
lens gently, then dry it.
HUD Troubleshooting
If you cannot see the HUD image
when the ignition is on, check that:
.Nothing is covering the HUD lens.
.The HUD brightness setting is not
too dim or too bright.
.The HUD is adjusted to the proper
height.
.Polarized sunglasses are not worn.
.The windshield and HUD lens are
clean.
If the HUD image is not correct,
contact your dealer.
The windshield is part of the HUD
system. If windshield replacement is
required, see Windshield Replacement
0 328.
Vehicle Messages
Messages displayed on the Driver
Information Center (DIC) indicate the
status of the vehicle or some action
that may be needed to correct a
condition. Multiple messages may
appear one after another.
The messages that do not require
immediate action can be
acknowledged and cleared by pressing
the thumbwheel. The messages that
require immediate action cannot be
cleared until that action is performed.
All messages should be taken
seriously; clearing the message does
not correct the problem. If a SERVICE message appears, see
your dealer.
Follow the instructions given in the
messages. The system displays
messages regarding the following
topics:
.Service Messages
.Fluid Levels
.Vehicle Security
.Brakes
.Steering
.Ride Control Systems
.Driver Assistance Systems
.Cruise Control
.Lighting and Bulb Replacement
.Wiper/Washer Systems
.Doors and Windows
.Seat Belts
.Airbag Systems
.Engine and Transmission
.Tire Pressure
.Battery

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
INSTRUMENTS AND CONTROLS 117
Engine Power Messages
REDUCED ACCELERATION DRIVE
WITH CARE
This message displays when the
vehicle's propulsion power is reduced.
A reduction in propulsion power can
affect the vehicle's ability to
accelerate. If this message is on, but
there is no observed reduction in
performance, proceed to your
destination. Under certain conditions
the performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven while this
message is on, but maximum
acceleration and speed may be
reduced. Anytime this message stays
on, or displays repeatedly, the vehicle
should be taken to your dealer for
service as soon as possible.
Under certain operating conditions,
propulsion will be disabled. Try
restarting after the ignition has been
off for two minutes.
Vehicle Speed Messages
SPEED LIMITED TO
XXX KM/H (MPH)
This message shows that the vehicle
speed has been limited to the speed
displayed. The limited speed is a
protection for various propulsion and
vehicle systems, such as lubrication,
thermal, brakes, suspension, Teen
Driver if equipped, or tires.
Vehicle Personalization
The following are all possible vehicle
personalization features. Depending
on the vehicle, some may not be
available.
For System, Apps, and Personal
features and functions, seeSettings
0 176.
To access the vehicle
personalization menu: 1. Touch the Settings icon on the Home Page of the infotainment
display.
2. Touch Vehicle to display a list of available options. 3. Touch to select the desired feature
setting.
4. Touch
9orRto turn a feature off
or on.
5. Touch
zto go to the top level of
the Settings menu.
The menu may contain the following:
Rear Seat Reminder
This allows for a chime and a message
when the rear door has been opened
before or during operation of the
vehicle.
Touch Off or On.
Buckle to Drive
This feature can prevent shifting out
of Park when the driver, and if
applicable the front passenger, seat
belt is not buckled. See Buckle To Drive
0 41.
Touch Off or On.
Driver Mode Customization
Touch and the following may display:
.My Mode
.V-Mode

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
134 INFOTAINMENT SYSTEM
Infotainment System
Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . 134
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Steering Wheel Controls . . . . . . . . . 137
Using the System . . . . . . . . . . . . . . . . . 137
Software Updates . . . . . . . . . . . . . . . . . 140
Radio
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . 141
HD Radio Technology . . . . . . . . . . . . 143
Radio Data System (RDS) . . . . . . . . 143
Satellite Radio . . . . . . . . . . . . . . . . . . . . 144
Radio Reception . . . . . . . . . . . . . . . . . . 144
Multi-Band Antenna . . . . . . . . . . . . . 145
Audio Players
Avoiding Untrusted MediaDevices . . . . . . . . . . . . . . . . . . . . . . . . . . 145
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Bluetooth Audio . . . . . . . . . . . . . . . . . . 148
OnStar System
OnStar System . . . . . . . . . . . . . . . . . . . . 149
Navigation
Using the Navigation System . . . . 150
Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Navigation Symbols . . . . . . . . . . . . . . 154
Destination . . . . . . . . . . . . . . . . . . . . . . . 155 OnStar System . . . . . . . . . . . . . . . . . . . . 160
Global Positioning
System (GPS) . . . . . . . . . . . . . . . . . . . 161
Vehicle Positioning . . . . . . . . . . . . . . . 162
Problems with Route Guidance . . . . . . . . . . . . . . . . . . . . . . . . 162
If the System Needs Service . . . . . 163
Map Data Updates . . . . . . . . . . . . . . . 163
Database Coverage Explanations . . . . . . . . . . . . . . . . . . . . 163
Voice Recognition
Voice Recognition . . . . . . . . . . . . . . . . 163
Phone
Bluetooth (Overview) . . . . . . . . . . . . . 169
Bluetooth (Pairing and Using aPhone) . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . . . 174
Settings
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Teen Driver . . . . . . . . . . . . . . . . . . . . . . . 184
Trademarks and License
Agreements
Trademarks and LicenseAgreements . . . . . . . . . . . . . . . . . . . . . 187
Introduction
Read the following pages to become
familiar with the features.
{Warning
Taking your eyes off the road for
too long or too often while using
any infotainment feature can cause
a crash. You or others could be
injured or killed. Do not give
extended attention to infotainment
tasks while driving. Limit your
glances at the vehicle displays and
focus your attention on driving. Use
voice commands whenever possible.
The infotainment system has built-in
features intended to help avoid
distraction by disabling some features
when driving. These features may gray
out when they are unavailable. Many
infotainment features are also
available through the instrument
cluster and steering wheel controls.
Before driving:
.Become familiar with the operation,
center stack controls, steering wheel
controls, and infotainment display.

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 143
Favorites can also be stored by
touching
Hin a station or channel
list. This will highlight indicating that
it is now saved as a favorite.
The number of favorites displayed is
automatically adjusted by default, but
can be manually adjusted in Settings
in the System tab under Favorites and
then Set Number of Audio Favorites.
It can also be adjusted in Settings in
the Apps tab under Audio and then
Set Number of Audio Favorites.
HD Radio Technology
If equipped, HD Radio is a free service
with features such as digital quality
sound, more stations available on a
single frequency such as HD2 and
HD3, and display information such as
artist and song title.
From the Now Playing display, touch
the HD Radio icon to turn HD on
or off.
Station Access
To access HD Radio stations:
1. Tune the radio to the station. If HD Radio is turned on and the station
is broadcasting in HD Radio, the radio will automatically tune to the
HD version of the current channel
(HD1) after several seconds. The
radio will also display icons
representing additional channels
(HD2, ...HD8), that may be
available. When the radio
successfully tunes to a HD station,
the HD logo will display and digital
audio will play.
2. Touch the display arrows to tune to the previous or next HD Radio
station.
There may be a delay before the
station starts playing.
The HD Radio station number is
indicated next to the HD logo.
HD Radio stations can be saved as
favorites.
For a list of all stations, see
www.hdradio.com.
HD Radio Troubleshooting
Digital Audio Delay : Wait for the
signal to process. This can take
several seconds. Volume Change, Audio Skip, Echo,
Digital Audio Lost :
Station signal
strength may be weak, the station is
out of range, or the station may be
out of alignment. Verify proper
reception on another station.
If the HD Radio signal weakens while
listening to HD1, the radio will
automatically switch to the analog
version of the radio station.
If the HD Radio signal loses reception
while listening to stations HD2 to
HD8, the radio mutes until the signal
can be recovered or until the station is
changed.
HD Radio can be disabled if driving in
a weak signal area. Touch HD Radio
On/Off to toggle HD Radio reception
on and off.
Radio Data System (RDS)
If equipped, RDS features are available
for use only on FM stations that
broadcast RDS information. With RDS,
the radio can:
.Group stations by Category (i.e.,
Program Type) such as Rock, Jazz,
Classical, etc.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
144 INFOTAINMENT SYSTEM
.Display messages from radio
stations.
This system relies on receiving
specific information from these
stations and only works when the
information is available. It is possible
that a radio station could broadcast
incorrect information that causes the
radio features to work improperly.
If this happens, contact the radio
station.
When information is broadcast from a
RDS station, the station name or call
letters display on the audio screen.
Radio text supporting the currently
playing broadcast may also appear.
Satellite Radio
SiriusXM Radio Service
If equipped, vehicles with a valid
SiriusXM radio subscription can
receive SiriusXM programming.
SiriusXM radio has a wide variety of
programming and commercial-free
music, coast to coast, in digital-quality
sound. In the U.S., see
www.siriusxm.com or call 1-888-601-6296. In Canada, see
www.siriusxm.ca or call
1-877-438-9677.
When SiriusXM is active, the channel
name, number, song title, and artist
appear on the display.
SiriusXM with 360L
SiriusXM with 360L interface has
enhanced in-vehicle listening
experience for subscribers. The
experience now offers more categories
and system learned recommendations
toward discovering more personalized
content.
To use the full SiriusXM 360L
program, including streaming content
and listening recommendations,
OnStar Connected Access is required.
Connected vehicle services vary by
model and require a complete working
electrical system, cell reception, and
GPS signal. An active connected plan
is required.
Reference the SiriusXM user guide for
use and subscription information.
Radio Reception
Unplug electronic devices from the
accessory power outlets if there is
interference or static in the radio.
FM
FM signals only reach about 16 to
65 km (10 to 40 mi). Although the
radio has a built-in electronic circuit
that automatically works to reduce
interference, some static can occur,
especially around tall buildings or
hills, causing the sound to fade in
and out.
AM
The range for most AM stations is
greater than for FM, especially at
night. The longer range can cause
station frequencies to interfere with
each other. Static can also occur when
things like storms and power lines
interfere with radio reception. When
this happens, try reducing the treble
on the radio.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INFOTAINMENT SYSTEM 145
SiriusXM Satellite Radio Service
If equipped, SiriusXM Satellite Radio
Service provides digital radio
reception. Tall buildings or hills can
interfere with satellite radio signals,
causing the sound to fade in and out.
In addition, traveling or standing
under heavy foliage, bridges, garages,
or tunnels may cause loss of the
SiriusXM signal for a period of time.
Some cellular services may interfere
with SXM reception causing loss of
signal.
Mobile Device Usage
Mobile device usage, such as making
or receiving calls, charging, or just
having the mobile device on may
cause static interference in the radio.
Unplug the mobile device or turn it
off if this happens.
Multi-Band Antenna
The roof antenna may be used for
radio, navigation, and OnStar,
depending on the equipped options.
Keep clear of obstructions for clearreception. If the vehicle has a sunroof,
and it is open, reception can also be
affected.
Audio Players
Avoiding Untrusted Media
Devices
When using media devices such as SD
cards, USB devices, and mobile
devices, consider the source.
Untrusted media devices could
contain files that affect system
operation or performance. Avoid use if
the content or origin cannot be
trusted.
USB Port
Audio stored on a USB device may be
listened to.
The vehicle may be equipped with two
USB ports in the center console under
the armrest. These ports are for data
and charging. There may also be two
USB ports for charging only at the rear
of the center console.
Caution
To avoid vehicle damage, unplug all
accessories and disconnect all
accessory cables from the vehicle
when not in use. Accessory cables
left plugged into the vehicle,
unconnected to a device, could be
damaged or cause an electrical
short if the unconnected end comes
in contact with liquids or another
power source such as the accessory
power outlet.
Playing from a USB
A USB mass storage device can be
connected to the USB port.
Audio extensions supported by the
USB may include:
.MP3
.AAC
.OGG
.3GP
Gracenote
When plugging in a USB device,
Gracenote service builds voice tags for
music. Voice tags allow artists, albums

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INFOTAINMENT SYSTEM 149
3. Touch Bluetooth.
4. Touch Devices to add or deletedevices.
When touching Bluetooth, the radio
may not be able to launch the audio
player on the connected device to
start playing. When the vehicle is not
moving, use the mobile device to
begin playback.
All devices launch audio differently.
When selecting Bluetooth as a source,
the radio may show as paused on the
display. Press play on the device or
touch
pon the display to begin
playback.
Browse functionality will be provided
where supported by the Bluetooth
device. This media content will not be
part of the MyMedia source mode.
Some smartphones support sending
Bluetooth music information to
display on the radio. When the radio
receives this information, it will check
to see if any is available and display it.
For more information about supported
Bluetooth features, see
my.cadillac.com/learn.
OnStar System
4G LTE
If equipped with 4G LTE, up to seven
devices, such as smartphones, tablets,
and laptops, can be connected to
high-speed Internet through the
vehicle’s built-in Wi-Fi hotspot.
Call 1-888-4ONSTAR (1-888-466-7827)
to connect to an OnStar Advisor for
assistance. See www.onstar.com for
vehicle availability, details, and system
limitations. Service and connectivity
may vary by make, model, year,
carrier, availability, and conditions.
4G LTE service is available in select
markets. 4G LTE performance is based
on industry averages and vehicle
systems design. Some services require
a data plan.
The OnStar App
If equipped, the infotainment system
has OnStar controls in the embedded
OnStar app on the Home Page. Most
OnStar functions that can be
performed with the buttons can be
done using the app. To open the app,
touch the OnStar icon on the Home Page. App updates require a
corresponding service plan. Features
vary by region and model. Features
are subject to change. For more
information, see my.cadillac.com/learn
or press
Q.
Services
The Services tab displays the default
view for the app. Use this page to
launch the available OnStar services.
Touch a service to open its display.
Touch Wi-Fi to launch the
connections manager. Turn-by-Turn
and Advisor Call are the other tiled
options.
Account
The Account tab displays a snapshot
of the account linked with the vehicle.
If there is no such account, this tab
will show all values as ——. The call
advisor call icon will be active even if
there is no active account.
Advisor Call
Selecting Advisor Call is the same as
pressing
Qor calling 1-888-4ONSTAR
(1-888-466-7827). The X option in the

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
150 INFOTAINMENT SYSTEM
upper right corner of the screen does
not end the call, but returns to the
previous screen.
Turn-by-Turn Directions
With a connected plan, an OnStar
Advisor can download a destination to
the vehicle or its embedded navigation
system, if equipped. Select
Turn-by-Turn Directions from the
Services tab of the OnStar app to call
an Advisor or select a recent or
favorite destination. Touch the
navigation icons to select home,
address or place. A destination
transfer from OnStar will show the
detail view of the destination when it
is transferred from OnStar to the
Navigation application. See
www.onstar.com for a coverage map.
Services vary by model. Map coverage
is available in the United States,
Puerto Rico, and Canada.
Wi-Fi Hotspot
Touch to display the Settings page,
which shows the configurations for
the vehicle hotspot and allows them
to be changed.For more information, see
www.onstar.com.
Navigation
Using the Navigation
System
If equipped, launch the Nav
application by touching the Nav icon
on the Home Page or on the shortcut
tray near the bottom of the
infotainment display.
When the Nav application is launched
for the first time, a product
walkthrough is available. Use of the
feature requires the Terms and
Conditions and the Privacy statement
to be confirmed. If available and
signed into a profile, it is also
suggested to enable and confirm
Predictive Navigation.
Predictive Navigation (If Equipped)
If Predictive Navigation is available
and confirmed, this feature learns
preferences by remembering where
the vehicle has been. It uses the
locations and navigation history to
personalize routes and results.Predictive Navigation may learn
elements such as:
.Personalized routes based on
preferred streets.
.Search results that provide best
matches at the top of the list.
.Predictive traffic.
.Local map content updating.
Predictive Navigation can also be
enabled or disabled at a later time by
touching
A(Options). While in
Options, touch Settings, then Map and
Navigation Settings, and then
Predictive Navigation. See Settings
0 176.
Navigation Map View