2021 CADILLAC CT4 change wheel

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 11/23/20
170 INFOTAINMENT SYSTEM
Infotainment System Controls
For information about how to navigate
the menu system using the
infotainment controls, seeUsing the
System 0137.
Audio System
When using the Bluetooth mobile
device system, sound comes through
the vehicle's front audio system
speakers and overrides the audio
system. The volume level while on a
mobile device call can be adjusted by
pressing the steering wheel controls or
the volume control on the center
stack. The adjusted volume level
remains in memory for later calls. The
volume cannot be lowered beyond a
certain level.
Bluetooth (Pairing and
Using a Phone)
Pairing
A Bluetooth-enabled mobile device
must be paired to the Bluetooth
system and then connected to the
vehicle before it can be used. See the mobile device manufacturer's user
guide for Bluetooth functions before
pairing the device.
Pairing Information
.If no mobile device has been
connected, the Phone main page on
the infotainment display will show
the Connect Phone option. Touch
this option to connect. Another way
to connect is to touch the Phones
tab at the top right of the display
and then touch Add Phone.
.A Bluetooth smartphone with music
capability can be paired to the
vehicle as a smartphone and a
music player at the same time.
.Up to 10 devices can be paired to
the Bluetooth system.
.The pairing process is disabled
when the vehicle is moving.
.Pairing only needs to be completed
once, unless the pairing information
on the cell phone changes or the
cell phone is deleted from the
system.
.If multiple paired cell phones are
within range of the system, the
system connects to the paired cell
phone that is set to First toConnect. If there is no cell phone
set to First to Connect, it will link to
the cell phone which was used last.
To link to a different paired cell
phone, see
“Linking to a Different
Phone ”later in this section.
Near Field Communication (NFC)
If equipped, Near Field
Communication (NFC) allows
compatible smartphones to be paired
to the infotainment system. To begin
the pairing process: 1. Refer to the smartphone’s user manual to verify it is
NFC-compatible.
2. Unlock the smartphone.
3. Enable both NFC and Bluetooth on the smartphone if either is
disabled. The NFC icon should be
in the status bar of the
smartphone.
4. Hold the smartphone 2.54 cm (1 in) or less from the NFC icon
Won
the center stack.
5. Once pairing begins, a pop-up message with a six-digit code will
appear on the smartphone and the
infotainment display.

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 - 12/4/20
DRIVING AND OPERATING 203
Automatic EmergencyBraking (AEB) . . . . . . . . . . . . . . . . . . . 285
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Side Blind Zone Alert (SBZA) . . . . 289
Lane Change Alert (LCA) . . . . . . . . 289
Lane Keep Assist (LKA) . . . . . . . . . . 291
Fuel
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . 293
Recommended Fuel (LSY 2.0L L4
Turbo Engine) . . . . . . . . . . . . . . . . . . . 293
Recommended Fuel (L3B 2.7L L4 Turbo Engine) . . . . . . . . . . . . . . . . . . . 294
Prohibited Fuels . . . . . . . . . . . . . . . . . . 294
Fuels in Foreign Countries . . . . . . . 294
Fuel Additives . . . . . . . . . . . . . . . . . . . . 294
Filling the Tank . . . . . . . . . . . . . . . . . . 295
Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . . . . . . . 296
Trailer Towing
General Towing Information . . . . 297
Driving Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 297
Trailer Towing (LSY 2.0L L4 Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Towing Equipment . . . . . . . . . . . . . . . 302
Conversions and Add-Ons
Add-On Electrical Equipment . . . 303
Driving Information
Driving for Better Fuel
Economy
Driving habits can affect fuel mileage.
Here are some driving tips to get the
best fuel economy possible:
.Set the climate controls to the
desired temperature after the engine
is started, or turn them off when
not required.
.Avoid fast starts and accelerate
smoothly.
.Brake gradually and avoid abrupt
stops.
.Avoid idling the engine for long
periods of time.
.When road and weather conditions
are appropriate, use cruise control.
.Always follow posted speed limits or
drive more slowly when conditions
require.
.Keep vehicle tires properly inflated.
.Combine several trips into a
single trip.
.Replace the vehicle's tires with the
same TPC Spec number molded into
the tire's sidewall near the size.
.Follow recommended scheduled
maintenance.
Distracted Driving
Distraction comes in many forms and
can take your focus from the task of
driving. Exercise good judgment and
do not let other activities divert your
attention away from the road. Many
local governments have enacted laws
regarding driver distraction. Become
familiar with the local laws in
your area.
To avoid distracted driving, keep your
eyes on the road, keep your hands on
the steering wheel, and focus your
attention on driving.
.Do not use a phone in demanding
driving situations. Use a hands-free
method to place or receive
necessary phone calls.
.Watch the road. Do not read, take
notes, or look up information on
phones or other electronic devices.
.Designate a front seat passenger to
handle potential distractions.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
206 DRIVING AND OPERATING
.The Antilock Brake System (ABS)
allows steering while braking.
Off-Road Recovery
The vehicle's right wheels can drop off
the edge of a road onto the shoulder
while driving. Follow these tips:1. Ease off the accelerator and then, if there is nothing in the way, steer
the vehicle so that it straddles the
edge of the pavement.
2. Turn the steering wheel about one-eighth of a turn, until the right
front tire contacts the
pavement edge. 3. Turn the steering wheel to go
straight down the roadway.
Loss of Control
Skidding
There are three types of skids that
correspond to the vehicle's three
control systems:
.Braking Skid —wheels are not
rolling.
.Steering or Cornering Skid —too
much speed or steering in a curve
causes tires to slip and lose
cornering force.
.Acceleration Skid —too much
throttle causes the driving wheels
to spin.
Defensive drivers avoid most skids by
taking reasonable care suited to
existing conditions, and by not
overdriving those conditions. But
skids are always possible. If the vehicle starts to slide, follow
these suggestions:
.Ease your foot off the accelerator
pedal and steer the way you want
the vehicle to go. The vehicle may
straighten out. Be ready for a
second skid if it occurs.
.Slow down and adjust your driving
according to weather conditions.
Stopping distance can be longer and
vehicle control can be affected when
traction is reduced by water, snow,
ice, gravel, or other material on the
road. Learn to recognize warning
clues
—such as enough water, ice,
or packed snow on the road to
make a mirrored surface —and
slow down when you have any
doubt.
.Try to avoid sudden steering,
acceleration, or braking, including
reducing vehicle speed by shifting
to a lower gear. Any sudden changes
could cause the tires to slide.
Remember: Antilock brakes help avoid
only the braking skid.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
208 DRIVING AND OPERATING
Engine Oil
Check the oil level often during track
events and competitive driving and
keep the oil level at or near the
upper mark.
Fuel
Use premium unleaded gasoline with
a posted octane rating of 93 at a track
event. Unleaded gasoline with a
posted octane rating of 91 may be
used, but performance will be
degraded.
Automatic Transmission Fluid
Have the transmission fluid set to the
track specific oil level prior to track
usage. Transmission fluid should be
changed after every 15 hours of track
usage. Any transmission level set or
change should be performed at your
dealer.
Brakes
Brake cooling can be improved if the
front brake disc splash shield and
front tire deflector are removed.
Removing the shield will require that
the suspension bushings and wheelspeed wires visible to the brake disc
be protected with insulated thermal
wrapping.
Caution
Removing the splash shield can
degrade wet braking performance,
as well as introduce brake pedal
pulsation, due to brake disc
exposure to road debris. Only
remove the front brake disc splash
shield and front tire deflector when
driving in track events.
Brake Pad Wear Sensors
(V-Series Only)
If equipped, the brake pad wear
sensors need to be removed from the
brake calipers prior to any track or
racing event. The original sensors can
be reinstalled if significant brake pad
wear is not observed. The sensor
should not extend beyond the brake
pad surface at the rotor contact.
If this condition is observed, the brake
pad life system needs to be disabled
until a new set of brake pads and
sensors are installed and the system
reset. Brake Fluid
.Before racing, replace existing brake
fluid with a qualified racing brake
fluid from a sealed container. Brake
fluid with a dry boiling point
>279 °C (534 °F) is qualified.
If racing brake fluid is used, replace
it with GM approved brake fluid
before driving on public roads. See
Recommended Fluids and Lubricants
0
391.
.Do not use silicone-based fluids.
If racing brake fluid is in the vehicle
and the age of the brake fluid is over a
month old or unknown, replace the
brake fluid between racing/closed
track driving.
Caution
Failure to change the brake fluid
and transfer case fluid after any
performance or race track driving
could result in damage not covered
by the vehicle warranty. Have the
brake fluid and transfer case fluid
changed by your dealer after any (Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
214 DRIVING AND OPERATING
To save fuel, run the engine for short
periods to warm the vehicle and then
shut the engine off and partially close
the window. Moving about to keep
warm also helps.
If it takes time for help to arrive,
when running the engine, push the
accelerator pedal slightly so the
engine runs faster than the idle speed.
This keeps the battery charged to
restart the vehicle and to signal for
help with the headlamps. Do this as
little as possible, to save fuel.
If the Vehicle Is Stuck
Slowly and cautiously spin the wheels
to free the vehicle when stuck in sand,
mud, ice, or snow.
If stuck too severely for the traction
system to free the vehicle, turn the
traction system off and use the
rocking method. SeeTraction Control/
Electronic Stability Control 0239.
{Warning
If the vehicle's tires spin at high
speed, they can explode, and you or
others could be injured. The vehicle
can overheat, causing an engine
compartment fire or other damage.
Spin the wheels as little as possible
and avoid going above 56 km/h
(35 mph).
Rocking the Vehicle to Get it Out
Turn the steering wheel left and right
to clear the area around the front
wheels. Turn off any traction system.
Shift back and forth between
R (Reverse) and a low forward gear,
spinning the wheels as little as
possible. To prevent transmission
wear, wait until the wheels stop
spinning before shifting gears. Release
the accelerator pedal while shifting,
and press lightly on the accelerator
pedal when the transmission is in
gear. Slowly spinning the wheels in
the forward and reverse directions
causes a rocking motion that could
free the vehicle. If that does not get
the vehicle out after a few tries, it might need to be towed out. If the
vehicle does need to be towed out, see
Towing the Vehicle
0369.
Vehicle Load Limits
It is very important to know how
much weight the vehicle can carry.
This weight is called the vehicle
capacity weight and includes the
weight of all occupants, cargo, and
all nonfactory-installed options.
Two labels on the vehicle may
show how much weight it may
properly carry: the Tire and
Loading Information label and the
Certification label.
{Warning
Do not load the vehicle any
heavier than the Gross Vehicle
Weight Rating (GVWR),
or either the maximum front or
rear Gross Axle Weight Rating
(GAWR). This can cause
systems to break and change
the way the vehicle handles.
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
236 DRIVING AND OPERATING
Temporary Tap Shift Mode
To enter Temporary Tap Shift Mode:1. With the transmission in D (Drive) and not in Permanent Tap Shift
Mode, the Tap Shift controls will
activate a Temporary Tap Shift
Mode, allowing the transmission to
be manually shifted. While in
Temporary Tap Shift Mode, the D
on the instrument cluster will be
highlighted and the current gear
shown.
2. To shift to the lowest available gear, press and hold the left
control.
3. To deactivate, hold the right control briefly. Automatic shifts
return after no manual shifts have
been done for seven to 10 seconds.
While using Tap Shift, the vehicle will
have firmer, quicker shifting. This can
be used for sport driving or when
climbing or descending hills, to stay in
gear longer, or to downshift for more
power or engine braking.
The transmission will only allow
shifting into gears appropriate for the
vehicle speed and engine revolutions per minute (rpm). If shifting is
prevented for any reason, the M or D
will flash in the instrument cluster.
The transmission will not
automatically shift to the next higher
gear if the engine rpm is too high.
It will only automatically shift to the
next lower gear if the engine rpm is
much too low.
Drive Systems
All-Wheel Drive
Vehicles with this feature always send
engine power to all four wheels. It is
fully automatic, and adjusts itself as
needed for road conditions.
Brakes
Electric Brake Boost
Vehicles equipped with electric brake
boost have hydraulic brake circuits
that are electronically controlled when
the brake pedal is applied during
normal operation. The system
performs routine tests and turns off
within a few minutes after the vehicle
is turned off. Noise may be heardduring this time. If the brake pedal is
pressed during the tests or when the
electric brake boost system is off, a
noticeable change in pedal force and
travel may be felt. This is normal.
Antilock Brake
System (ABS)
The Antilock Brake System (ABS)
helps prevent a braking skid and
maintain steering while braking hard.
If there is a problem with ABS, this
warning light stays on. See
Antilock
Brake System (ABS) Warning Light
0 100.
ABS does not change the time needed
to get a foot on the brake pedal and
does not always decrease stopping
distance. If you get too close to the
vehicle ahead, there will not be
enough time to apply the brakes if

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
242 DRIVING AND OPERATING
V-Mode Button
To activate V-Mode, press the V-Mode
button on the steering wheel. To
deactivate, select a different mode
using the DMC switch, or press the
V-Mode button on the steering wheel.
When V-Mode is deactivated by the
V-Mode button, DMC returns to
Tour Mode.
Mode Description
Tour Mode
Use for normal city and highway
driving to provide a smooth, soft ride.
This mode provides a balance between
comfort and handling. This is the
standard mode. See “Mode Selection Attributes”
later in this section. When
Tour Mode is selected, no indicator
will display.
Sport Mode
Use this mode where road conditions
or personal preference demand a more
controlled response. When this mode
is selected, the vehicle immediately
downshifts. The vehicle also monitors
driving behaviors and automatically
enables Performance Shift Features
when spirited driving is detected.
These features maintain lower
transmission gears to increase
available engine braking and improve
acceleration response. The vehicle will
exit this feature and return to normal
operation after a short period when
spirited driving is no longer detected.
The steering changes to provide more
precise control. If the vehicle has
Magnetic Ride Control, the suspension
changes to provide better cornering
performance.
See “Mode Selection Attributes ”later
in this section. Snow/Ice Mode
Use this mode for slippery surfaces to
help control wheel speed. This mode
can compromise the acceleration on
dry asphalt.
This feature is not intended for use
when the vehicle is stuck in sand,
mud, or gravel. If the vehicle is stuck,
see
If the Vehicle Is Stuck 0214.
See “Mode Selection Attributes ”later
in this section.
Track Mode (V-Series Only)
When in Track Mode, the automatic
transmission and steering function
similar to Sport Mode. The accelerator
pedal is adjusted to give maximum
control during the highest level of
spirited driving. The Magnetic Ride
Control will be set to the optimum
level for vehicle responsiveness.
Performance Traction Management
(PTM) can be accessed through this
mode. See “Performance Traction
Management ”in Competitive Driving
Mode 0246.
See “Mode Selection Attributes ”later
in this section.