2021 CADILLAC CT4 USB

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
148 INFOTAINMENT SYSTEM
Touch one of the following Browse
options to save a favorite:
Playlists :Touch
Hnext to any
playlist to store the playlist as a
favorite. Touch a saved favorite to
recall a favorite playlist. The first song
in the playlist begins to play.
Artists : Touch
Hnext to any artist
to store the artist as a favorite. Touch
a saved favorite to recall a favorite
artist. The first song in the artist list
begins to play.
Songs : Touch
Hnext to any song to
store the song as a favorite. Touch a
saved favorite to recall a favorite song.
Albums : Touch
Hnext to any
album to store the album as a
favorite. Touch a saved favorite to
recall a favorite album. The first song
in the album list begins to play.
Genres : Touch
Hnext to any genre
to store the genre as a favorite. Touch
a saved favorite to recall a favorite
genre. The first song of the genre
begins to play. Podcasts :
Touch
Hnext to any
podcast to store the podcast as a
favorite. Touch a saved favorite to
recall a favorite podcast. The podcast
begins to play.
Audiobooks : Touch
Hnext to any
audiobook to store the audiobook as a
favorite. Touch a saved favorite to
recall a favorite audiobook. The first
chapter in the audiobook begins
to play.
Media Playback and Mute
USB playback will be paused if the
system is muted. If the steering wheel
mute control is pressed again,
playback will resume.
If the source is changed while in
mute, playback resumes and audio
will unmute.
Bluetooth Audio
Music may be played from a paired
Bluetooth device. See Bluetooth
(Overview) 0169 or
Bluetooth (Pairing and Using a Phone)
0 170 for help pairing a device. Volume and song selection may be
controlled by using the infotainment
controls or the mobile device.
If Bluetooth is selected and no volume
is present, check the volume setting
on both your mobile device and the
infotainment system.
Music can be launched by touching
Bluetooth from the recent sources list
on the left of the display or by
touching the More option and then
touching the Bluetooth device.
To play music via Bluetooth:
1. Power on the device, and pair to connect the device.
2. Once paired, touch Audio from the Home Page, then touch Bluetooth
from the recent sources list on the
left of the display.
Bluetooth Sound Menu
See “Infotainment System Sound
Menu ”under AM-FM Radio 0141.
Manage Bluetooth Devices
From the Home Page: 1. Touch Audio.
2. Touch More.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INFOTAINMENT SYSTEM 171
6. Select Yes on the smartphone toconfirm the pairing process.
A chime will sound when pairing
begins.
Multiple smartphones can be paired
using this technology.
Functionality varies by model and
region. Full functionality requires
compatible Bluetooth and
smartphone, as well as USB
connectivity for some devices.
Pairing a Phone 1. Make sure Bluetooth has been enabled on the cell phone before
the pairing process is started.
2. Touch the Phone icon on the Home Page or the phone icon on the
shortcut tray near the bottom of
the display.
3. Touch Phones at the top of the infotainment display. There is also
a Connect Phones option in the
middle of the Phone display which
will shortcut to the Phone
List menu.
4. Touch Add Phone. 5. Select the vehicle name shown on
the infotainment display from your
cell phone’s Bluetooth Settings list.
6. Follow the instructions on the cell phone to confirm the six-digit code
showing on the infotainment
display and touch Pair. The code on
the cell phone and infotainment
display will need to be
acknowledged for a successful pair.
7. Start the pairing process on the cell phone to be paired to the vehicle.
See the cell phone manufacturer's
user guide for information on this
process. Once the cell phone is
paired, it will show under
Connected.
8. If the vehicle name does not appear on your cell phone, there
are a few ways to start the pairing
process over:
.Turn the cell phone off and then
back on.
.Go back to the beginning of the
Phone menus on the
infotainment display and restart
the pairing process.
.Reset the cell phone, but this
step should be done as a last
effort.
9. If the cell phone prompts to accept connection or allow phone book
download, touch Always Accept
and Allow. The phone book may
not be available if not accepted.
10. Repeat Steps 1−8 to pair additional cell phones.
First to Connect Paired Phones
If multiple paired cell phones are
within range of the system, the
system connects to the paired cell
phone that is set as First to Connect.
To enable a paired cell phone as the
First to Connect phone: 1. Make sure the cell phone is turned on.
2. Touch Settings, then touch System.
3. Touch Phones to access all paired and all connected cell phones and
mobile devices.
4. Touch the information icon to the right of the cell phone to open the
cell phone’s settings menu.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
174 INFOTAINMENT SYSTEM
Declining a Call
There are two ways to decline a call:
.Pression the steering wheel
controls.
.Touch Ignore on the infotainment
display.
Call Waiting
Call waiting must be supported on the
Bluetooth cell phone and enabled by
the wireless service carrier to work.
Accepting a Call
Press
gto answer, then touch Switch
on the infotainment display.
Declining a Call
Press
ito decline, then touch
Ignore on the infotainment display
Switching Between Calls (Call
Waiting Calls Only)
To switch between calls, touch Phone
on the Home Page to display Call
View. While in Call View, touch the
call information of the call on hold to
change calls.
Three-Way Calling
Three-way calling must be supported
on the Bluetooth cell phone and
enabled by the wireless service carrier
to work.
To start a three-way call while in a
current call:
1. In the Call View, touch Add Call to add another call.
2. Initiate the second call by selecting from Recents, Contacts, or Keypad.
3. When the second call is active, touch the merge icon to conference
the three-way call together.
Ending a Call
.Pression the steering wheel
controls.
.Touch#on the infotainment
display, next to a call, to end only
that call.
Dual Tone Multi-Frequency
(DTMF) Tones
The in-vehicle Bluetooth system can
send numbers during a call. This is
used when calling a menu-driven
phone system. Use the Keypad to
enter the number.
Apple CarPlay and
Android Auto
If equipped, Android Auto and/or
Apple CarPlay capability may be
available through a compatible
smartphone. If available, the Android
Auto and Apple CarPlay icons will
change from gray to color on the
Home Page of the infotainment
display.
To use Android Auto and/or Apple
CarPlay:
For Wired Phone Projection
1. Download the Android Auto app to your smartphone from the Google
Play store. There is no app required
for Apple CarPlay.
2. Connect your Android phone or Apple iPhone by using the
factory-provided phone USB cable

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INFOTAINMENT SYSTEM 175
and plugging into a USB data port.
For best performance, it is highly
recommended to use the device’s
factory-provided USB cable, which
should be replaced after significant
wear to maintain connection
quality. Aftermarket or third-party
cables may not work.
3. When the phone is first connected to activate Apple CarPlay or
Android Auto, accept the terms
and conditions on both the
infotainment system and the
phone.
4. Follow the instructions on the phone.
The Android Auto and Apple CarPlay
icons on the Home Page will
illuminate depending on the
smartphone. Android Auto and/or
Apple CarPlay may automatically
launch upon USB connection. If not,
touch the Android Auto or Apple
CarPlay icon on the Home Page to
launch.
Press
{on the center stack to return
to the Home Page. For Wireless Phone Projection
Verify your phone is wireless
compatible by visiting the Google
Android Auto or Apple CarPlay
support page.
1. Download the Android Auto app to your smartphone from the Google
Play store. There is no app required
for Apple CarPlay.
2. For first time connection, there are two ways to set up wireless
projection:
.Connect your Android phone or
Apple iPhone by using the
factory-provided phone USB
cable and plugging into a USB
data port. For best performance,
it is highly recommended to use
the device’s factory-provided
USB cable, which should be
replaced after significant wear
to maintain connection quality.
Aftermarket or third-party
cables may not work.
.Connecting the phone over
Bluetooth. See Bluetooth
(Overview) 0169 or
Bluetooth (Pairing and Using a
Phone) 0170. 3. Make sure WiFi is turned on the
phone for wireless projection
to work.
4. When the phone is first connected to activate Apple CarPlay or
Android Auto, agree to the terms
and conditions on both the
infotainment system and the
phone.
5. Follow the instructions on the phone.
The Android Auto and Apple CarPlay
icons on the Home Page will
illuminate depending on the
smartphone. Android Auto and/or
Apple CarPlay may automatically
launch upon wireless connection.
If not, touch the Android Auto or
Apple CarPlay icon on the Home Page
to launch.
To disconnect the phones wireless
projection: 1. Select Settings from the Home Page.
2. Select Phones
3. Touch
4next to the phone to be
disconnected.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
336 VEHICLE CARE
FusesUsage
13 –
14 –
15 –
16 –
17 –
18 Display/Infotainment/ USB/Multi-function
control module
19 Airbag/ Automatic occupant sensing /
Data link connection/
Wireless charging
module/ Virtual key
module
20 Power steering column module/
Electronic steering
column lock 2
21 Driver monitor system/Performance
data recorder
22 –
23 –
24 – Fuses
Usage
25 USB
26 –
27 –
28 –
29 –
30 –
31 Headlamp level
32 –
33 Body ignition/IP ignition
34 Exhaust valve
35 Transmission control module ignition/
Engine control
module ignition/Shift
ignition/Brake
ignition
36 Shift module
37 Body control module 1/Electronic
park brake switch
38 Center stack module Fuses
Usage
39 Steering wheel controls
40 Body control module 2
41 Body control module 3
42 Body control module 4
Circuit
Breakers Usage
CB1 Auxiliary power outlet 1
CB2 Auxiliary power outlet 2
Relays Usage
1 Run after park/ Accessory
2 Run crank
3 –
4 –
5 –

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
428 INDEX
N
NavigationConnected Services . . . . . . . . . . . . . . . 418
Destination . . . . . . . . . . . . . . . . . . . . . . . . 155
Using the System . . . . . . . . . . . . . . . . . 150
Navigation Symbols . . . . . . . . . . . . . . . . 154
New Vehicle Break-In . . . . . . . . . . . . . . . 218
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
Engine Oil Life System . . . . . . . . . . . 314
Pressure Light . . . . . . . . . . . . . . . . . . . . . 104
Older Children, Restraints . . . . . . . . . . . 59
Online Owner Center . . . . . . . . . . . . . . . 402
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
OnStar Additional Information . . . . 414
OnStar Emergency . . . . . . . . . . . . . . . . . . 414
OnStar Overview . . . . . . . . . . . . . . . . . . . . 413
OnStar Security . . . . . . . . . . . . . . . . . . . . . 414
OnStar System . . . . . . . . . . . . . . . . .149, 160
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Overheating, Engine . . . . . . . . . . . . . . . . 322
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Instrument Panel . . . . . . . . . . . . . . . . . . . . 4
P
ParkShifting Into . . . . . . . . . . . . . . . . 223, 224
Shifting Out of . . . . . . . . . . . . . . . . . . . . 225
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Parking Brake and P (Park)Mechanism Check . . . . . . . . . . . . . . . 327
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Over Things That Burn . . . . . . . . . . . 226
Parking or Backing Assistance Systems . . . . . . . . . . . . . . . 277
Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Passenger Sensing System . . . . . . . . . . 53
Pedestrian Ahead Indicator . . . . . . . . 102
Perchlorate Materials
Requirements, California . . . . . . . . . 306
Performance Shifting Light . . . . . . . . 101
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Phone
Apple CarPlay and
Android Auto . . . . . . . . . . . . . . . . . . . . 174
Bluetooth . . . . . . . . . . . . . . . . . . . . 169, 170
Port USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Positioning
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Protection, Battery . . . . . . . . . . . . . . . . 133
Retained Accessory (RAP) . . . . . . . . 223
Seat Adjustment . . . . . . . . . . . . . . . . . . . 32
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Pregnancy, Using Seat Belts . . . . . . . . . 46
Privacy Vehicle Data Recording . . . . . . . . . . 410
Problems with Route Guidance . . . . 162
Program Courtesy Transportation . . . . . . . . . 405
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . 294
Proposition 65 Warning,
California . . . . . . . . . . . . . . .305, 326, 366,
Back Cover

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
INDEX 431
Thigh Support Adjustment . . . . . . . . . . 33
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339All-Season . . . . . . . . . . . . . . . . . . . . . . . . . 339
Buying New Tires . . . . . . . . . . . . . . . . . 354
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358
Designations . . . . . . . . . . . . . . . . . . . . . . 343
Different Size . . . . . . . . . . . . . . . . . . . . . . 356
If a Tire Goes Flat . . . . . . . . . . . . . . . . 359
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 352
Low Profile . . . . . . . . . . . . . . . . . . . . . . . . 341
Pressure . . . . . . . . . . . . . . . . . . . . . 346, 347
Pressure Light . . . . . . . . . . . . . . . . . . . . . 104
Pressure Monitor Operation . . . . . . 349
Pressure Monitor System . . . . . . . . 348
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Run-Flat . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Sealant and Compressor Kit . . . . . 360
Sealant and Compressor Kit,Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . 366
Self-Sealing . . . . . . . . . . . . . . . . . . . . . . . . 341
Sidewall Labeling . . . . . . . . . . . . . . . . . 342
Terminology and Definitions . . . . 344
Uniform Tire Quality Grading . . . . 356
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Wheel Replacement . . . . . . . . . . . . . . 357 Tires (cont'd)
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . 293
Towing Driving Characteristics . . . . . . . . . . . 297
Equipment . . . . . . . . . . . . . . . . . . . . . . . . 302
General Information . . . . . . . . . . . . . . 297
Recreational Vehicle . . . . . . . . . . . . . . 370
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Track Events and Competitive Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Traction Control System
(TCS)/StabiliTrak Light . . . . . . . . . 103
Limited-Slip Differential . . . . . . . . . . 248
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . . . 239
Trademarks and License Agreements . . . . . . . . . . . . . . . . . . . . . . . . 187
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 Transmission
Automatic . . . . . . . . . . . . . . . . . . . 227, 229
Fluid, Automatic . . . . . . . . . . . . . . . . . . 315
Transportation Program, Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 405
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . 93
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Turn and Lane-Change Signals . . . . 129
U
Umbrella Storage . . . . . . . . . . . . . . . . . . . . 79
Uniform Tire Quality Grading . . . . . . 356
Universal Remote System . . . . . . . . . . 122 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Programming . . . . . . . . . . . . . . . . . . . . . . 122
Updates Map Data . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Using the Navigation System . . . . . . 150
Using the System . . . . . . . . . . . . . . . . . . . 137
Using This Manual . . . . . . . . . . . . . . . . . . . . 2