2022 CADILLAC CT4 brake

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 255
remains on. If the amber service
parking brake warning light is on, see
your dealer.
If the EPB is applied while the vehicle
is moving, the vehicle will decelerate
as long as the switch is pressed. If the
switch is pressed until the vehicle
comes to a stop, the EPB will remain
applied.
The vehicle may automatically apply
the EPB in some situations when the
vehicle is not moving. This is normal,
and is done to periodically check the
correct operation of the EPB system,
or at the request of other safety
functions that utilize the EPB.
If the EPB fails to apply, block the rear
wheels to prevent vehicle movement.
EPB Release
To release the EPB:1. Turn the ignition on or to ACC/ACCESSORY.
2. Apply and hold the brake pedal.
3. Press the EPB switch momentarily.
The EPB is released when the red
parking brake status light is off. If the amber service parking brake
warning light is on, release the EPB by
pressing and holding the EPB switch.
Continue to hold the switch until the
red parking brake status light is off.
If either light stays on after release is
attempted, see your dealer.
Caution
Driving with the parking brake on
can overheat the brake system and
cause premature wear or damage to
brake system parts. Make sure that
the parking brake is fully released
and the brake warning light is off
before driving.
If you are towing a trailer and parking
on a hill, see Driving Characteristics
and Towing Tips 0315.
Automatic EPB Release
The EPB will automatically release if
the vehicle is running, placed into
gear, and an attempt is made to drive
away. Avoid rapid acceleration when
the EPB is applied, to preserve parking
brake lining life. The EPB can also be used to prevent
roll back for vehicles with a manual
transmission taking off on a hill.
When no roll back is desired, an
applied EPB will allow both feet to be
used for the clutch and accelerator
pedals in preparation for starting the
vehicle moving in the intended
direction. In this case, there is no
need to press the switch to release
the EPB.
Brake Assist
Brake Assist detects rapid brake pedal
applications due to emergency braking
situations and provides additional
braking to activate the Antilock Brake
System (ABS) if the brake pedal is not
pushed hard enough to activate ABS
normally. Minor noise, brake pedal
pulsation, and/or pedal movement
during this time may occur. Continue
to apply the brake pedal as the driving
situation dictates. Brake Assist
disengages when the brake pedal is
released.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
256 DRIVING AND OPERATING
Hill Start Assist (HSA)
{Warning
Do not rely on the HSA feature.
HSA does not replace the need to
pay attention and drive safely. You
may not hear or feel alerts or
warnings provided by this system.
Failure to use proper care when
driving may result in injury, death,
or vehicle damage. SeeDefensive
Driving 0210.
When the vehicle is stopped on a
grade, Hill Start Assist (HSA)
temporarily prevents the vehicle from
rolling in an unintended direction
during the transition from brake pedal
release to accelerator pedal apply. The
brakes release when the accelerator
pedal is applied or automatically
release after a few seconds. The brakes
may also release under other
conditions. Do not rely on HSA to
hold the vehicle.
HSA is available when the vehicle is
facing uphill in a forward gear,
or when facing downhill in R (Reverse). The vehicle must come to
a complete stop on a grade for HSA to
activate.Automatic Vehicle
Hold (AVH)
{Warning
Do not rely on this feature. It does
not replace the need to pay
attention and drive safely. You may
not hear or feel alerts or warnings
provided by this system. Failure to
use proper care when driving may
result in injury, death, or vehicle
damage.When Automatic Vehicle Hold (AVH)
is turned on and the vehicle is braked
to a stop, AVH prevents the vehicle
from moving during the transition
from brake pedal release to accelerator
pedal apply. The brakes release when
the accelerator pedal is applied. The
brakes may also release under other
conditions. Do not rely on AVH to
hold the vehicle.
If the accelerator pedal is not applied
within a few minutes, the Electric
Parking Brake will apply. The parking
brake will also apply if the driver door
is opened or the driver seat belt is
unfastened while AVH is holding the
vehicle.
AVH can be turned on by pressing
AUTO HOLD. The indicator light on
the switch will come on. The AVH
light on the instrument panel will
come on while AVH is actively holding
the vehicle. See
Automatic Vehicle Hold
(AVH) Light 0103.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 257
Ride Control Systems
Traction Control/Electronic
Stability Control
The vehicle has a Traction Control
System (TCS) and StabiliTrak/
Electronic Stability Control (ESC).
These systems help limit wheel slip
and assist the driver in maintaining
control, especially on slippery road
conditions.
TCS activates if it senses that any of
the drive wheels are spinning or
beginning to lose traction. When this
happens, the system brakes the
spinning wheel(s) and/or reduces
engine power to limit wheel spin.
StabiliTrak/ESC activates when the
computer senses a difference between
the intended path and the direction
the vehicle is actually traveling.
StabiliTrak/ESC selectively applies
braking pressure at any one of the
vehicle's brakes to help steer the
vehicle in the intended direction.If cruise control is being used and TCS
or StabiliTrak/ESC begins to limit
wheel spin, cruise control will
disengage. Cruise control may be
turned back on when road conditions
allow.
Both systems come on automatically
when the vehicle is started and begins
to move. The systems may be heard or
felt while they are operating or while
performing diagnostic checks. This is
normal and does not mean there is a
problem with the vehicle.
It is recommended to leave both
systems on for normal driving
conditions, but It may be necessary to
turn TCS off if the vehicle gets stuck
in sand, mud, ice, or snow. See
If the
Vehicle Is Stuck 0227 and “Turning
the Systems Off and On ”later in this
section.
The indicator light for both systems is
in the instrument cluster. This
light will:
.Flash when TCS is limiting
wheel spin.
.Flash when StabiliTrak/ESC is
activated.
.Turn on and stay on when either
system is not working.
If either system fails to turn on or to
activate, a message may display in the
Driver Information Center (DIC), and
dcomes on and stays on to indicate
that the system is inactive and is not
assisting the driver in maintaining
control. The vehicle is safe to drive,
but driving should be adjusted
accordingly.
If
dcomes on and stays on:
1. Stop the vehicle.
2. Turn the engine off and wait 15 seconds.
3. Start the engine.
Drive the vehicle. if
dcomes on and
stays on, the vehicle may need more
time to diagnose the problem. If the
condition persists, see your dealer.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
258 DRIVING AND OPERATING
Turning the Systems Off and On
Caution
Do not repeatedly brake or
accelerate heavily when TCS is off.
The vehicle driveline could be
damaged.
To turn off only TCS, press and
release
g. The traction off lighti
displays in the instrument cluster.
A DIC message may display.
To turn TCS on again, press and
release
g. The traction off lighti
displayed in the instrument cluster
will turn off. If TCS is limiting wheel spin when
g
is pressed, the system will not turn off
until the wheels stop spinning.
To turn off both TCS and StabiliTrak/
ESC, press and hold
guntil the
traction off light
iand StabiliTrak/
ESC OFF light
gcome on and stay on
in the instrument cluster. A DIC
message may display.
To turn TCS and StabiliTrak/ESC on
again, press and release
g. The
traction off light
iand StabiliTrak/
ESC OFF light
gin the instrument
cluster turn off.
Adding accessories can affect the
vehicle's performance. See Accessories
and Modifications 0323.
Driver Mode Control
Driver Mode Control (DMC) allows the
driver to adjust the overall driving
experience to better suit driver
preference by adjusting vehicle
systems to fit specific driving needs.
Drive mode availability and affected vehicle systems are dependent on
vehicle trim level, region, and optional
features.
If the vehicle is in Tour Mode or My
Mode, it will stay in that mode
through future ignition cycles. If the
vehicle is in any other mode, it will
return to Tour Mode when the vehicle
is restarted. When a mode is selected,
an indicator will come on in the
instrument cluster and stay on.
Mode Activation
Driver Mode Control Switch for
Automatic Transmission

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 261
My Mode
My Mode is used to personalize
everyday driving. This mode is
designed to allow the driver to
configure vehicle systems to their own
preference for city or normal driving.
Through the DIC, the following vehicle
systems may be available for
customization in this mode.
.Steering: Tour (default), Sport,
Track
.Suspension: Tour (default), Sport,
Track
.Brake Feel: Tour (default), Sport,
Track
.Engine Sound: Stealth, Tour
(Default), Sport, Track
For information on the range of
settings, see “Drive Mode
Customization.” V-Mode (V-Series Only)
V-Mode is used to personalize
dynamic driving. This mode is
designed to allow the driver to
configure vehicle subsystems to their
own preference for maximum
handling. V-Mode further enhances
the driver’s experience by adding an
Engine/Shift customization option.
Through the DIC, the following vehicle
systems may be available for
customization in this mode.
.Steering: Tour, Sport (default),
Track
.Suspension: Tour, Sport, (default),
Track
.Engine/Shift: Snow/Ice, Tour, Sport,
(default), Track
.Brake Feel: Tour, Sport, Track
.Engine Sound: Stealth, Tour, Sport
(default), Track
.PTM: OFF, WET, DRY, SPORT, RACE
1, RACE 2
For information on the range of
settings, see “Drive Mode
Customization.”

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
262 DRIVING AND OPERATING
Mode Selection Attributes
MODESTOUR
Default SPORT TRACK SNOW/ICE
Engine/Shift TourTourTrack Snow/Ice
Throttle Progression TourTourTrack Snow/Ice
Transmission Shift Mode TourSport Track Tour
Engine Sound TourSport Track Tour
Steering TourSport Track Tour
Suspension (if equipped with Magnetic Ride
Control) Tour
Sport Track Tour
Traction and Stability Control TourTourTrack Tour
Competitive Driving Mode (if equipped) Not Available Available Not Available Not Available
Performance Traction Mode (if equipped) Not Available Not Available Available Not Available
Brake Feel TourSport Track Tour
Throttle Progression
Adjusts throttle sensitivity by
selecting how quick or slow the
throttle reacts to input.
.Snow/Ice –The accelerator pedal
reduces engine torque at small
pedal inputs. This allows better
wheel control on slippery surfaces.
.Track –The accelerator pedal
adjusts to give maximum control
during the highest level of spirited
driving.
Transmission Shift Mode
Sport or Track –Dynamic
Performance Mode (DPM) allows the
transmission to hold the current gear after a quick release of a heavily
applied accelerator pedal. This
provides greater engine braking and
enhanced vehicle control without
using the paddles. DPM recognizes
aggressive cornering, heavy braking,
and high acceleration to select and

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
DRIVING AND OPERATING 263
hold lower gears when not using
paddles. The shifts are also firmer to
increase the quickness of shifting.
Engine Sound
Adjusts the volume of engine noise.
The sound level changes when the
variable exhaust valves open.
Steering (Assist Effort)
Adjusts from a lighter steering feel in
Tour Mode to reduced assist in Sport
and Track Mode for more
steering feel.
Magnetic Ride Control (If Equipped)
Adjusts the shock dampening
firmness from a comfort in Tour Mode
to an optimized responsiveness tune
in Sport and Track.
Stability Control
.Competitive Mode allows less
computer control to permit some
slide and drift and is selected with
the TCS/StabiliTrak button–only
available in Sport Mode.
.StabiliTrak/Electronic Stability
Control (ESC) can be turned off by
pressing and holding the TCS/
StabiliTrak button for five seconds.
Brake Feel
Adjusts brake pedal sensitivity by
selecting how quick or slow the brakes
respond to input.
Drive Mode Customization
The following settings can be changed
using the Drive Mode Customization
Menu. See Settings > Vehicle > Drive
Mode Customization in the center
display to customize My Mode or
V-Mode.
Steering
Steering adjusts the effort required to
turn the steering wheel. The steering
wheel offers better feedback in the
Tour setting, but requires more effort
in the Sport and Track settings.
–Tour, Sport, Track
Suspension
Suspension adjusts the firmness of the
suspension in the vehicle. Suspension
adjusts the stiffness of the shocks and/or springs. The ride is more
comfortable at lower settings and is
stiffer at higher settings for better
control.
–Tour, Sport, Track
Brake Feel
Brake Feel adjusts the brake pedal
response. Settings range from a slower
response for more comfortable driving
to the quickest response for quicker
deceleration. Brake pedal travel
decreases and caliper pressure
increases in the Sport and Track
settings.
–Tour, Sport, Track
Engine/Shift
Engine/Shift adjusts the throttle
response, gear shifting and engine
performance. Throttle response
increases in the Sport, Track, and
Snow/Ice settings, and gear shifting is
more aggressive.
–Snow/Ice, Tour, Sport, Track

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-15283641) -
2022 - CRC - 10/12/21
266 DRIVING AND OPERATING
launching the vehicle. This feature is
intended for use during closed course
race events where consistent zero to
60 and quarter mile times are
desirable.
Launch Control is only available when
the following criteria are met:
.Competitive Driving Mode is
selected or any of the PTM modes
are selected. The traction off light
comes on in the instrument cluster
and the appropriate DIC message
displays.
.The vehicle is not moving.
.The steering wheel is pointing
straight.
Automatic Transmissions
.The brake pedal is firmly pressed to
the floor, equivalent to a panic
brake event.
.The accelerator pedal is rapidly
applied to wide open throttle. If the
vehicle rolls due to wide open
throttle, release the throttle, press
the brake pedal more firmly, and
reapply the accelerator to wide open
throttle.Launch Control will initially limit
engine speed as you rapidly apply the
accelerator pedal to wide open
throttle. Allow the engine rpm to
stabilize. A smooth, quick release of
the brake pedal, while maintaining the
fully pressed accelerator pedal, will
manage wheel slip.
After the vehicle is launched, the
system continues in Competitive
Driving Mode or PTM.
Competitive Driving Mode, PTM, and
Launch Control are systems designed
for a closed course race track and not
intended for public roads. The systems
are not intended to compensate for
lack of driver experience or familiarity
with the race track.
Limited-Slip Differential
If equipped, the Electronic
Limited-Slip Differential (eLSD) is
automatically activated. eLSD actively
monitors vehicle sensors and driver
inputs to determine the amount of
change for the conditions. With eLSD,
the vehicle has:
.Enhanced high-speed control.
.Improved traction through corners,
allowing more acceleration.
.More precise steering.
.Increased vehicle agility.
.Integration with StabiliTrak/
Electronic Stability Control (ESC).
For vehicles with eLSD, driven under
severe conditions, the rear axle fluid
should be changed. See Competitive
Driving Mode 0264 and
Maintenance Schedule 0408.
Cruise Control
{
Warning
Cruise control can be dangerous
where you cannot drive safely at a
steady speed. Do not use cruise
control on winding roads or in
heavy traffic.
Cruise control can be dangerous on
slippery roads. On such roads, fast
changes in tire traction can cause
excessive wheel slip, and you could
lose control. Do not use cruise
control on slippery roads.