ECU CADILLAC CT4 2020 Workshop Manual

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
ONSTAR 337
Security
If equipped, OnStar provides these
services:
.With Stolen Vehicle Assistance,
OnStar Advisors can use GPS to
pinpoint the vehicle and help
authorities quickly recover it.
. With Remote Ignition Block,
if equipped, OnStar can block the
engine from being restarted.
. With Stolen Vehicle Slowdown,
if equipped, OnStar can work with
law enforcement to gradually slow
the vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked
and the vehicle alarm sounds, a
notification by text, e-mail, or phone
call will be sent. If the vehicle is
stolen, an OnStar Advisor can work
with authorities to recover the vehicle.
OnStar Additional
Information
In-Vehicle Audio Messages
Audio messages may play important
information at the following times:
.
Prior to vehicle purchase. Press
Q
to set up an account.
. After change in ownership and at
90 days.
Transferring Service
PressQto request account transfer
eligibility information. The Advisor
can cancel or change account
information.
Selling/Transferring the Vehicle
Call 1-888-4ONSTAR (1-888-466-7827)
immediately to terminate your OnStar
or connected services if the vehicle is
disposed of, sold, transferred, or if the
lease ends.
Reactivation for Subsequent
Owners
PressQand follow the prompts to
speak to an Advisor as soon as
possible. The Advisor will update
vehicle records and explain OnStar or
connected service options.
How OnStar Service Works
Automatic Crash Response,
Emergency Services, Crisis Assist,
Stolen Vehicle Assistance, Remote
Services, and Roadside Service are
available on most vehicles. Not all
OnStar services are available
everywhere or on all vehicles. For
more information, a full description of
OnStar services, system limitations,
and OnStar User Terms, Privacy
Statement, and Software Terms:
. Call 1-888-4ONSTAR
(1-888-466-7827).
. See www.onstar.com (U.S.).
. See www.onstar.ca (Canada).
. Call TTY 1-877-248-2080.
. Press
Qto speak with an Advisor.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
ONSTAR 339
Potential Issues
OnStar cannot perform Remote Door
Unlock or Stolen Vehicle Assistance
after the vehicle has been off
continuously for 10 days without an
ignition cycle. If the vehicle has not
been started for 10 days, OnStar can
contact Roadside Service or a
locksmith to help gain access to the
vehicle.
Global Positioning System (GPS)
.Obstruction of the GPS can occur
in a large city with tall buildings;
in parking garages; around
airports; in tunnels and
underpasses; or in an area with
very dense trees. If GPS signals are
not available, the OnStar system
should still operate to call OnStar.
However, OnStar could have
difficulty identifying the exact
location.
. In emergency situations, OnStar
can use the last stored GPS
location to send to emergency
responders. A temporary loss of GPS can cause
loss of the ability to send a
Turn-by-Turn Navigation route. The
Advisor may give a verbal route or
may ask for a call back after the
vehicle is driven into an open area.
Cellular and GPS Antennas
Cellular reception is required for
OnStar to send remote signals to the
vehicle. Do not place items over or
near the antenna to prevent blocking
cellular and GPS signal reception.
Unable to Connect to OnStar
Message
If there is limited cellular coverage or
the cellular network has reached
maximum capacity, this message may
come on. Press
Qto try the call again
or try again after driving a few miles
into another cellular area.
Vehicle and Power Issues
OnStar services require a vehicle
electrical system, wireless service, and
GPS satellite technologies to be
available and operating for features to function properly. These systems may
not operate if the battery is
discharged or disconnected.
Add-on Electrical Equipment
The OnStar system is integrated into
the electrical architecture of the
vehicle. Do not add any electrical
equipment. See
Add-On Electrical
Equipment 0231. Added electrical
equipment may interfere with the
operation of the OnStar system and
cause it to not operate.
Vehicle Software Updates
OnStar or GM may remotely deliver
software updates or changes to the
vehicle without further notice or
consent. These updates or changes
may enhance or maintain safety,
security, or the operation of the
vehicle or the vehicle systems.
Software updates or changes may
affect or erase data or settings that
are stored in the vehicle, such as
saved navigation destinations or
pre-set radio stations. Neither OnStar
nor GM is responsible for any affected
or erased data or settings. These
updates or changes may also collect

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
342 CONNECTED SERVICES
Get My Destination1. Press
=. System responds:
“OnStar ready,” then a tone.
2. Say “Get my destination.” System
responds with the address and
distance to the destination, then
responds with “OnStar ready,”
then a tone.
Send Destination to Vehicle
Directions can be sent to the vehicle’s
navigation screen, if equipped.
Press
Q, then ask the Advisor to
download directions to the vehicle’s
navigation system, if equipped. After
the call ends, the navigation screen
will provide prompts to begin driving
directions. Routes that are sent to the
navigation screen can only be
canceled through the navigation
system.
See www.onstar.com (U.S.) or
www.onstar.ca (Canada).
Connections
The following services help with
staying connected. For coverage maps, see
www.onstar.com (U.S.) or
www.onstar.ca (Canada).
Ensuring Security
.
Change the default passwords for
the Wi-Fi hotspot and myCadillac
mobile app. Make these passwords
different from each other and use
a combination of letters and
numbers to increase the security.
. Change the default name of the
SSID (Service Set Identifier). This
is your network’s name that is
visible to other wireless devices.
Choose a unique name and avoid
family names or vehicle
descriptions.
Wi-Fi Hotspot (If Equipped)
The vehicle may have a built-in Wi-Fi
hotspot that provides access to the
Internet and web content at 4G LTE
speed. Up to seven mobile devices can
be connected. A data plan is required.
Use the in-vehicle controls only when
it is safe to do so. 1. To retrieve Wi-Fi hotspot
information, press
=to open
the OnStar app on the
infotainment display, then select
Wi-Fi Hotspot. On some vehicles,
touch Wi-Fi or Wi-Fi Settings on
the screen.
2. The Wi-Fi settings will display the Wi-Fi hotspot name (SSID),
password, and on some vehicles,
the connection type (no Internet
connection, 3G, 4G, 4G LTE), and
signal quality (poor, good,
excellent). The LTE icon shows
connection to Wi-Fi. It is
possible that the icon may not
illuminate even though the
vehicle has an active connection.
3. To change the SSID or password, press
Qor call 1-888-4ONSTAR
to connect with an Advisor. On
some vehicles, the SSID and
password can be changed in the
Wi-Fi Hotspot menu.
After initial set-up, your vehicle’s
Wi-Fi hotspot will connect
automatically to your mobile devices.
Manage data usage by turning Wi-Fi
on or off on your mobile device, by

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
344 INDEX
IndexA
Accessories and Modifications . . . . . 235
Accessory Power . . . . . . . . . . . . . . . . . . . . 163
Active Fuel Management . . . . . . . . . . . 167
Adaptive Cruise Control . . . . . . . . . . . . 194
Add-On Electrical Equipment . . . . . . 231
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . 36
Thigh Support . . . . . . . . . . . . . . . . . . . . . . 36
Air Cleaner/Filter, Engine . . . . . . . . . . 245
Air Conditioning . . . . . . . . . . . . . . . . . . . . 134
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . . . . . 139
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
How Does an Airbag Restrain? . . . . . 55
Passenger Sensing System . . . . . . . . . 57
What Makes an Airbag Inflate? . . . . 55
What Will You See after anAirbag Inflates? . . . . . . . . . . . . . . . . . . . 56
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Where Are the Airbags? . . . . . . . . . . . . 53 Airbags
Adding Equipment to the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Passenger Status Indicator . . . . . . . . . 99
Readiness Light . . . . . . . . . . . . . . . . . . . . . 98
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
System Check . . . . . . . . . . . . . . . . . . . . . . . 51
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . 22
Alert
Lane Change . . . . . . . . . . . . . . . . . . . . . . 217
Rear Pedestrian . . . . . . . . . . . . . . . . . . . 209
Side Blind Zone (SBZA) . . . . . . . . . . 217
All-Season Tires . . . . . . . . . . . . . . . . . . . . . 268
All-Wheel Drive . . . . . . . . . . . . . . . .178, 255
Antilock Brake System (ABS) . . . . . . 179 Warning Light . . . . . . . . . . . . . . . . . . . . 103
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Assistance Systems for Driving . . . . 210
Assistance Systems for Parking and Backing . . . . . . . . . . . . . . . . . . . . . . . 204
Auto Stop
Stop/Start System . . . . . . . . . . . . . . . . 161
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . . . . 27

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
INDEX 345
Automatic (cont'd)Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Emergency Braking (AEB) . . . . . . . . 213
Headlamp System . . . . . . . . . . . . . . . . 128
Transmission . . . . . . . . . . . . . . . . . 169, 171
Transmission Fluid . . . . . . . . . . . . . . . 244
Vehicle Hold Light . . . . . . . . . . . . . . . . 103
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . 176, 177
Automatic Vehicle Hold (AVH) . . . . 181
B
Battery Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Load Management . . . . . . . . . . . . . . . . 131
Power Protection . . . . . . . . . . . . . . . . . . 132
Battery - North America . . . . . .254, 288
Blade Replacement, Wiper . . . . . . . . . 256
Brake Electric Boost . . . . . . . . . . . . . . . . . . . . . 179
Parking, Electric . . . . . . . . . . . . . . . . . . 179
System Warning Light . . . . . . . . . . . . 102
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Braking (cont'd)
Automatic Emergency (AEB) . . . . . 213
Braking System Front Pedestrian (FPB) . . . . . . . . . . . 214
Break-In, New Vehicle . . . . . . . . . . . . . . 157
Bulb Replacement Front Turn Signal Lamps . . . . . . . . 259
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . 258
Headlamp Aiming . . . . . . . . . . . . . . . . 258
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . 258
High Intensity Discharge(HID) Lighting . . . . . . . . . . . . . . . . . . . 259
Buying New Tires . . . . . . . . . . . . . . . . . . . 282
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . 235
California Proposition 65 Warning . . . . . . . . . . . . .234, 254, 288, Back Cover
Canadian Vehicle Owners . . . . . . . . . . . . . 2
Capacities and Specifications . . . . . . 318
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . 168
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Winter Driving . . . . . . . . . . . . . . . . . . . . 152 Cargo
Management System . . . . . . . . . . . . . . . 84
Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Caution, Danger, and Warning . . . . . . . . 3
Center Console Storage . . . . . . . . . . . . . . 83
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . 286
Charging Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Charging System Light . . . . . . . . . . . . . . 99
Check Engine Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 100
Child Restraints Infants and Young Children . . . . . . . . 65
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Older Children . . . . . . . . . . . . . . . . . . . . . . 63
Securing . . . . . . . . . . . . . . . . . . . . . . . . .76, 78
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . 260
Cleaning Exterior Care . . . . . . . . . . . . . . . . . . . . . . 293
Interior Care . . . . . . . . . . . . . . . . . . . . . . 297
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . . . . . 134
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Cluster, Instrument . . . . . . . . . . . . . . . . . . 93
Collision Damage Repair . . . . . . . . . . . 328

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
346 INDEX
CompartmentsStorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Competitive Driving Mode . . . . . . . . . 189
Composite Materials . . . . . . . . . . . . . . . . 157
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . 342
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . 343
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . 341
Connections Connected Services . . . . . . . . . . . . . . . 342
Control Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Control of a Vehicle . . . . . . . . . . . . . . . . 144
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . 25
Coolant Engine Temperature Gauge . . . . . . . . 97
Engine Temperature WarningLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Cooling System . . . . . . . . . . . . . . . . . . . . . 246
Cornering Lamps . . . . . . . . . . . . . . . . . . . 129
Courtesy Lamps . . . . . . . . . . . . . . . . . . . . . 130
Courtesy Transportation
Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . 192 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Cruise Control, Adaptive . . . . . . . . . . . 194
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Customer Assistance . . . . . . . . . . . . . . . 323
Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Text Telephone (TTY) Users . . . . . 323
Customer Information Publications Ordering
Information . . . . . . . . . . . . . . . . . . . . . . 330
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 321
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . 333
D
Damage Repair, Collision . . . . . . . . . . . 328
Danger, Warning, and Caution . . . . . . . . 3
Data Collection Infotainment System . . . . . . . . . . . . . 334
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Data Recorders, Event . . . . . . . . . . . . . . 333
Daytime Running Lamps (DRL) . . . 127
Defensive Driving . . . . . . . . . . . . . . . . . . . 143
Delayed Locking . . . . . . . . . . . . . . . . . . . . . 18
Diagnostics Connected Services . . . . . . . . . . . . . . . 343
Differential, Limited-Slip . . . . . . . . . . . 191
Distracted Driving . . . . . . . . . . . . . . . . . . 143
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . 130 Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . 108
Delayed Locking . . . . . . . . . . . . . . . . . . . . 18
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . 18
Drive Belt Routing, Engine . . . . . . . . . 320
Drive Systems All-Wheel Drive . . . . . . . . . . . . . . 178, 255
Driver Assistance Systems . . . . . . . . . 203
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . . . . . 109
Driver Mode Control . . . . . . . . . . . . . . . . 184
Driver Mode Control Light . . . . . . . . . 106
Driving Assistance Systems . . . . . . . . . . . . . . . 210
Better Fuel Economy . . . . . . . . . . . . . 142
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 225
Competitive . . . . . . . . . . . . . . . . . . . . . . . 189
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Hill and Mountain Roads . . . . . . . . 151
If the Vehicle is Stuck . . . . . . . . . . . . 153
Loss of Control . . . . . . . . . . . . . . . . . . . . 146
Off-Road Recovery . . . . . . . . . . . . . . . . 145
Track Events and Competitive . . . 146
Vehicle Load Limits . . . . . . . . . . . . . . 154
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . 151

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
INDEX 349
K
Keyless EntryRemote (RKE) System . . . . . . . . . . . . . . . 8
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
L
Labeling, Tire Sidewall . . . . . . . . . . . . . 270
Lamps Cornering . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Daytime Running (DRL) . . . . . . . . . . 127
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Exterior Controls . . . . . . . . . . . . . . . . . . 125
Exterior Lamps Off Reminder . . . . 127
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Front Turn Signal . . . . . . . . . . . . . . . . . 259
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 100
On Reminder . . . . . . . . . . . . . . . . . . . . . . 108
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Lane Change Alert (LCA) . . . . . . . . . . . 217
Lane Keep Assist (LKA) . . . . . . . . . . . . 219
Lane Keep Assist Light . . . . . . . . . . . . . 103
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . 47
LATCH System Replacing Parts after a Crash . . . . . . 76 LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . . . . . . 70
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . 259
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Illumination Control . . . . . . . . . . . . . . 129
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . 98
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . 103
Automatic Vehicle Hold . . . . . . . . . . 103
Brake System Warning . . . . . . . . . . . 102
Charging System . . . . . . . . . . . . . . . . . . . . 99
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . 100
Cruise Control . . . . . . . . . . . . . . . . . . . . . 108
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Driver Mode Control . . . . . . . . . . . . . . 106
Electric Parking Brake . . . . . . . . . . . . 102
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . 105
Engine Oil Pressure . . . . . . . . . . . . . . . 107
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 127
High-Beam On . . . . . . . . . . . . . . . . . . . . 107
High/Low Beam Changer . . . . . . . . . 127
Lane Keep Assist . . . . . . . . . . . . . . . . . . 103 Lights (cont'd)
Low Fuel Warning . . . . . . . . . . . . . . . . 107
Seat Belt Reminders . . . . . . . . . . . . . . . . 97
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Service Electric Parking Brake . . . 102
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . 104
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 106
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . 105
Traction Off . . . . . . . . . . . . . . . . . . . . . . . 104
Limited-Slip Differential . . . . . . . . . . . . 191
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . 19
Delayed Locking . . . . . . . . . . . . . . . . . . . . 18
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Lockout Protection . . . . . . . . . . . . . . . . . 19
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Loss of Control . . . . . . . . . . . . . . . . . . . . . . 146
Low Fuel Warning Light . . . . . . . . . . . 107
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . 270
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . 70
Lumbar Adjustment . . . . . . . . . . . . . . . . . 36 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
350 INDEX
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . . . . . 310
Maintenance Schedule . . . . . . . . . . . . . 303 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . 313
Malfunction Indicator Lamp . . . . . . . 100
Manual Mode . . . . . . . . . . . . . . . . . .176, 177
Massage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . 37
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . 115
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . 115
Mirrors Automatic Dimming . . . . . . . . . . . . . . . . 27
Automatic Dimming Rearview . . . . . 28
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Manual Rearview . . . . . . . . . . . . . . . . . . . 28
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . 27
Mirrors, Interior Rearview . . . . . . . . . . . 28
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 Driver Control . . . . . . . . . . . . . . . . . . . . . 184 Monitor System, Tire Pressure . . . . . 276N
Navigation
Connected Services . . . . . . . . . . . . . . . 341
New Vehicle Break-In . . . . . . . . . . . . . . . 157
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Engine Oil Life System . . . . . . . . . . . 243
Pressure Light . . . . . . . . . . . . . . . . . . . . . 107
Older Children, Restraints . . . . . . . . . . . 63
Online Owner Center . . . . . . . . . . . . . . . 324
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
OnStar Additional Information . . . . 337
OnStar Emergency . . . . . . . . . . . . . . . . . . 336
OnStar Overview . . . . . . . . . . . . . . . . . . . . 335
OnStar Security . . . . . . . . . . . . . . . . . . . . . 337
Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Overheating, Engine . . . . . . . . . . . . . . . . 250
Overview Instrument Panel . . . . . . . . . . . . . . . . . . . . 5
P
ParkShifting Out of . . . . . . . . . . . . . . . . . . . . 165
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Parking Brake and P (Park)Mechanism Check . . . . . . . . . . . . . . . 256
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Over Things That Burn . . . . . . . . . . . 167
Parking or Backing
Assistance Systems . . . . . . . . . . . . . . . 204
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Passenger Sensing System . . . . . . . . . . 57
Pedestrian Ahead Indicator . . . . . . . . 104
Perchlorate Materials Requirements, California . . . . . . . . . 235
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Protection, Battery . . . . . . . . . . . . . . . . 132
Retained Accessory (RAP) . . . . . . . . 163
Seat Adjustment . . . . . . . . . . . . . . . . . . . . 35

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
352 INDEX
SeatsHead Restraints . . . . . . . . . . . . . . . . . . . . . 34
Heated and Ventilated Front . . . . . . . 40
Lumbar Adjustment, Front . . . . . . . . . 36
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Power Adjustment, Front . . . . . . . . . . 35
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Reclining Seatbacks . . . . . . . . . . . . . . . . 36
Securing Child Restraints . . . . . . . 76, 78
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Vehicle Alarm . . . . . . . . . . . . . . . . . . . . . . . 22
Self-Sealing Tires . . . . . . . . . . . . . . . . . . . 269
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Accessories andModifications . . . . . . . . . . . . . . . . . . . . 235
Doing Your Own Work . . . . . . . . . . . 235
Maintenance Records . . . . . . . . . . . . 316
Maintenance, General Information . . . . . . . . . . . . . . . . . . . . . . 302
Parts Identification . . . . . . . . . . . . . . . 317
Scheduling Appointments . . . . . . . . 326
Service Electric Parking Brake
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Services Special Application . . . . . . . . . . . . . . . 309 Servicing the Airbag . . . . . . . . . . . . . . . . . 61
Shifting
Into Park . . . . . . . . . . . . . . . . . . . . . 163, 164
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . 165
Side Blind Zone Alert (SBZA) . . . . . . 217
Signals, Turn and Lane-Change . . . . 129
Special Application Services . . . . . . . 309
Specifications and Capacities . . . . . . 318
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . 96
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Start Assist, Hill . . . . . . . . . . . . . . . . . . . . 181
Start Vehicle, Remote . . . . . . . . . . . . . . . 14
Starter Switch Check . . . . . . . . . . . . . . . 255
Starting the Engine . . . . . . . . . . . . . . . . . 160
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Heated Wheel . . . . . . . . . . . . . . . . . . . . . . . 86
Wheel Adjustment . . . . . . . . . . . . . . . . . . 86
Wheel Controls . . . . . . . . . . . . . . . . . . . . . 86
Stop/Start System . . . . . . . . . . . . . . . . . . 161
Storage Areas Cargo Management System . . . . . . . . 84
Center Console . . . . . . . . . . . . . . . . . . . . . . 83
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Umbrella . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Storage Compartments . . . . . . . . . . . . . . 82
Struts Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257 Stuck Vehicle . . . . . . . . . . . . . . . . . . . . . . . 153
Summer Tires . . . . . . . . . . . . . . . . . . . . . . . 270
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System
Forward Collision Alert (FCA) . . . . 211
Infotainment . . . . . . . . . . . . . . . . . 133, 334
Systems Driver Assistance . . . . . . . . . . . . . . . . . 203
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Text Telephone (TTY) Users . . . . . . . 323
Theft-Deterrent Systems . . . . . . . . . . . . 24Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . 24
Thigh Support Adjustment . . . . . . . . . . 36
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
All-Season . . . . . . . . . . . . . . . . . . . . . . . . . 268
Buying New Tires . . . . . . . . . . . . . . . . . 282
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Designations . . . . . . . . . . . . . . . . . . . . . . 272
Different Size . . . . . . . . . . . . . . . . . . . . . . 284
If a Tire Goes Flat . . . . . . . . . . . . . . . . 287
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 280
Low Profile . . . . . . . . . . . . . . . . . . . . . . . . 270
Pressure . . . . . . . . . . . . . . . . . . . . . . 275, 276

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-13183937) -
2020 - crc - 4/28/20
INDEX 353
Tires (cont'd)Pressure Light . . . . . . . . . . . . . . . . . . . . . 106
Pressure Monitor Operation . . . . . . 277
Pressure Monitor System . . . . . . . . 276
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Run-Flat . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Self-Sealing . . . . . . . . . . . . . . . . . . . . . . . . 269
Sidewall Labeling . . . . . . . . . . . . . . . . . 270
Terminology and Definitions . . . . 272
Uniform Tire Quality Grading . . . . 284
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Wheel Replacement . . . . . . . . . . . . . . 286
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . 221
Towing Driving Characteristics . . . . . . . . . . . 225
Equipment . . . . . . . . . . . . . . . . . . . . . . . . 230
General Information . . . . . . . . . . . . . . 225
Recreational Vehicle . . . . . . . . . . . . . . 292
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Track Events and Competitive Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Traction
Control System
(TCS)/StabiliTrak Light . . . . . . . . . 105
Limited-Slip Differential . . . . . . . . . . 191
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . . . 182
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Transmission Automatic . . . . . . . . . . . . . . . . . . . . 169, 171
Fluid, Automatic . . . . . . . . . . . . . . . . . . 244
Transportation Program, Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . 96
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Turn and Lane-Change Signals . . . . 129
U
Umbrella Storage . . . . . . . . . . . . . . . . . . . . 83
Uniform Tire Quality Grading . . . . . . 284
Universal Remote System . . . . . . . . . . 121 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Programming . . . . . . . . . . . . . . . . . . . . . . 121
Using This Manual . . . . . . . . . . . . . . . . . . . . 2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . . . . . . 22 Vehicle (cont'd)
Automatic Hold Light . . . . . . . . . . . . 103
Canadian Owners . . . . . . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Identification Number (VIN) . . . . . 317
Load Limits . . . . . . . . . . . . . . . . . . . . . . . 154
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Personalization . . . . . . . . . . . . . . . . . . . 116
Remote Start . . . . . . . . . . . . . . . . . . . . . . . . 14
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Speed Messages . . . . . . . . . . . . . . . . . . . 115
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Vehicle Ahead Indicator . . . . . . . . . . . . 104
Vehicle Care Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 275
Vehicle Data Recording and
Privacy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Vehicle Hold Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 181
Vehicle Hold (AVH) Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 181
Ventilation, Air . . . . . . . . . . . . . . . . . . . . . 139
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
W
Warning Brake System Light . . . . . . . . . . . . . . . 102