2021 CADILLAC CT4 warning

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 251
Ending Cruise Control
There are four ways to end cruise
control:
.Step lightly on the brake pedal.
.Press*.
.Shift the transmission to
N (Neutral).
.PressJ.
Erasing Speed Memory
The cruise control set speed is erased
from memory if
Jis pressed or if the
ignition is turned off.
Adaptive Cruise Control
(Advanced)
If equipped, Adaptive Cruise Control
(ACC) allows the cruise control set
speed and following gap to be
selected. Read this entire section
before using this system. The
following gap is the following time
between your vehicle and a vehicle
detected directly ahead in your path,
moving in the same direction. If no
vehicle is detected in your path, ACC works like regular cruise control. ACC
uses camera and radar sensors. See
Radio Frequency Statement
0409.
If a vehicle is detected in your path,
ACC can speed up the vehicle or apply
limited, moderate braking to maintain
the selected following gap. To
disengage ACC, apply the brake. If the
Traction Control System (TCS) or
StabiliTrak/Electronic Stability Control
(ESC) system activates while ACC is
engaged, ACC may automatically
disengage. See Traction Control/
Electronic Stability Control 0239. When
road conditions allow ACC to be safely
used, ACC can be turned back on. ACC
will not engage if the TCS or
StabiliTrak/ESC electronic stability
control system is disabled.
ACC can reduce the need for you to
frequently brake and accelerate,
especially when used on expressways,
freeways, and interstate highways.
When used on other roads, you may
need to take over the control of
braking or acceleration more often.
{Warning
ACC has limited braking ability and
may not have time to slow the
vehicle down enough to avoid a
collision with another vehicle you
are following. This can occur when
vehicles suddenly slow or stop
ahead, or enter your lane. Also see
“Alerting the Driver” in this section.
Complete attention is always
required while driving and you
should be ready to take action and
apply the brakes. See Defensive
Driving 0204.
{Warning
ACC will not detect or brake for
children, pedestrians, animals,
or other objects.
Do not use ACC when:
.On winding and hilly roads or
when the sensors are blocked by
snow, ice, or dirt. The system
(Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
252 DRIVING AND OPERATING
Warning (Continued)
may not detect a vehicle ahead.
Keep the entire front of the
vehicle clean.
.Visibility is low, such as in fog,
rain, or snow conditions. ACC
performance is limited under
these conditions.
.On slippery roads where fast
changes in tire traction can
cause excessive wheel slip.
J:Press to turn the system on or
off. The indicator turns white on the
instrument cluster when ACC is
turned on. RES+ :
Press briefly to resume the
previous set speed or to increase
vehicle speed if ACC is already
engaged. To increase speed by 1 km/h
(1 mph), press RES+ to the first detent.
To increase speed to the next 5 km/h
(5 mph) mark on the speedometer,
press RES+ to the second detent.
SET– :Press briefly to set the speed
and activate ACC or to decrease
vehicle speed if ACC is already
engaged. To decrease speed by 1 km/h
(1 mph), press SET− to the first detent.
To decrease speed to the next 5 km/h
(5 mph) mark on the speedometer,
press SET− to the second detent.
*:Press to disengage ACC without
erasing the selected set speed.
[: Press to select a following gap
time (or distance) setting for ACC of
Far, Medium, or Near.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster (Base
Level) 088 or
Instrument Cluster (Uplevel) 090. The
increment value used depends on the
units displayed. Switching Between ACC and
Regular Cruise Control
To switch between ACC and regular
cruise control, press and hold
*.
A Driver Information Display (DIC)
message displays. See Vehicle Messages
0 116.
ACC IndicatorRegular Cruise
Control Indicator
When ACC is engaged, a green
o
indicator will be lit on the instrument
cluster. When the regular cruise
control is engaged, a green
J
indicator will be lit on the instrument
cluster and the following gap will not
display.
When the vehicle is turned on, the
cruise control mode will be set to the
last mode used before the vehicle was
turned off.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 253
{Warning
Always check the cruise control
indicator on the instrument cluster
to determine which mode cruise
control is in before using the
feature. If ACC is not active, the
vehicle will not automatically brake
for other vehicles, which could
cause a crash if the brakes are not
applied manually. You and others
could be seriously injured or killed.
Setting Adaptive Cruise Control
If
ois on when not in use,
SET-/RES+ could be pressed by
mistake and activate ACC when not
desired. Keep
ooff when cruise is
not being used.
Select the set speed desired for ACC.
This is the vehicle speed when no
vehicle is detected in its path.
While the vehicle is moving, ACC will
not set at a speed below a minimum
speed, although it can be resumed.
If equipped with Super Cruise, this
minimum speed is 5 km/h (3 mph), otherwise, it is 25 km/h (15 mph). The
minimum allowable set speed is
25 km/h (15 mph).
To set ACC while moving:
1. Press
J.
2. Get up to the desired speed.
3. Press and release SET−.
4. Remove your foot from the accelerator.
After ACC is set, it may immediately
apply the brakes if a vehicle ahead is
detected closer than the selected
following gap.
ACC can also be set while the vehicle
is stopped if ACC is on and the brake
pedal is applied.
The ACC indicator displays on the
instrument cluster and Head-Up
Display (HUD), if equipped. When ACC
is turned on, the indicator will be lit
white. When ACC is engaged, the
indicator will turn green.
Be mindful of speed limits,
surrounding traffic speeds, and
weather conditions when selecting the
set speed. Resuming a Set Speed
If ACC is set at a desired speed and
then the brakes are applied, ACC is
disengaged without erasing the set
speed from memory.
To begin using ACC again, press RES+
up briefly while moving more than
5 kph (5 mph). The vehicle returns to
the previous set speed.
If the vehicle is stopped with the
brake pedal applied, press RES+ and
release the brake pedal. ACC will hold
the vehicle until RES+ or the
accelerator pedal is pressed.
A green ACC indicator and the set
speed display on the instrument
cluster. The vehicle ahead indicator
may be flashing if a vehicle ahead was
present and moved. See
“Approaching
and Following a Vehicle ”later in this
section.
Once ACC has resumed, if there is no
vehicle ahead, if the vehicle ahead is
beyond the selected following gap,
or if the vehicle has exited a sharp
curve, then the vehicle speed will
increase to the set speed.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
256 DRIVING AND OPERATING
Approaching and Following a
Vehicle
The vehicle ahead indicator is in the
instrument cluster and HUD display,
if equipped.
The vehicle ahead indicator only
displays when a vehicle is detected in
your vehicle’s path moving in the
same direction.
If this symbol is not displaying, ACC
will not respond to or brake to
vehicles ahead.
ACC automatically slows the vehicle
down and adjusts vehicle speed to
follow a detected vehicle ahead at the
selected follow gap. The vehicle speed
increases or decreases to follow a
detected vehicle in front of your
vehicle when that vehicle is traveling
slower than your vehicle set speed.
It may apply limited braking,
if necessary. When braking is active,the brake lamps will come on. The
automatic braking may feel or sound
different than if the brakes were
applied manually. This is normal.
Passing a Vehicle While Using ACC
If the set speed is high enough, and
the left turn signal is used to pass a
vehicle ahead in the selected following
gap, ACC may assist by gradually
accelerating the vehicle prior to the
lane change.
{Warning
When using ACC to pass a vehicle
or perform a lane change, the
following distance to the vehicle
being passed may be reduced. ACC
may not apply sufficient
acceleration or braking when
passing a vehicle or performing a
lane change. Always be ready to
manually accelerate or brake to
complete the pass or lane change.
Stationary or Very Slow-Moving
Objects
{Warning
ACC may not detect and react to
stopped or slow-moving vehicles
ahead of you. For example, the
system may not brake for a vehicle
it has never detected moving. This
can occur in stop-and-go traffic or
when a vehicle suddenly appears
due to a vehicle ahead changing
lanes. Your vehicle may not stop
and could cause a crash. Use
caution when using ACC. Your
complete attention is always
required while driving and you
should be ready to take action and
apply the brakes.
Irregular Objects Affecting ACC
ACC may have difficulty detecting the
following objects:
.Vehicles with cargo extending from
the back end.
.Non-standard shaped vehicles, such
as vehicle transport, vehicles with a
side car fitted, or horse carriages.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 257
.Objects that are close to the front of
your vehicle.
ACC Automatically Disengages
ACC may automatically disengage and
you will need to manually apply the
brakes to slow the vehicle when:
.The sensors are blocked.
.The Traction Control System (TCS)
or StabiliTrak/ESC system has
activated or been disabled.
.There is a fault in the system.
.The radar falsely reports blockage
when driving in a desert or remote
area with no other vehicles or
roadside objects. A DIC message
may display to indicate that ACC is
temporarily unavailable.
The ACC indicator will turn white
when ACC is no longer active.
In some cases, when ACC will not
activate, regular Cruise Control may
be used. See “Switching Between ACC
and Regular Cruise Control ”previously
in this section. Always consider
driving conditions before using either
cruise control system. Notification to Resume ACC
ACC will maintain a follow gap behind
a detected vehicle and slow your
vehicle to a stop behind that vehicle.
If the stopped vehicle ahead has
driven away and ACC has not
resumed, the vehicle ahead indicator
will flash as a reminder to check
traffic ahead before proceeding. In
addition, the left and right sides of the
Safety Alert Seat will pulse three
times, or three beeps will sound. See
“Alert Type
”and “Adaptive Cruise Go
Notifier” in“Collision/Detection
Systems” underVehicle Personalization
0 117.
When the vehicle ahead drives away,
ACC resumes automatically if the stop
was brief. If necessary, press RES+ or
the accelerator pedal to resume ACC.
If stopped for more than two minutes
or if the driver door is opened and the
driver seat belt is unbuckled, the ACC
automatically applies the Electric
Parking Brake (EPB) to hold the
vehicle. The EPB status light will turn
on. See Electric Parking Brake 0237.
To release the EPB, press the
accelerator pedal. A DIC warning message may display
indicating to shift to P (Park) before
exiting the vehicle.
{Warning
If ACC has stopped the vehicle, and
if ACC is disengaged, turned off,
or canceled, the vehicle will no
longer be held at a stop. The vehicle
can move. When ACC is holding the
vehicle at a stop, always be
prepared to manually apply the
brakes.
{Warning
Leaving the vehicle without placing
it in P (Park) can be dangerous. Do
not leave the vehicle while it is
being held at a stop by ACC. Always
place the vehicle in P (Park) and
turn off the ignition before leaving
the vehicle.
ACC Override
If using the accelerator pedal while
ACC is active, the ACC indicator turns
blue on the instrument cluster and in

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
258 DRIVING AND OPERATING
the HUD (if equipped) to indicate that
automatic braking will not occur. ACC
will resume operation when the
accelerator pedal is not being pressed.
{Warning
The ACC will not automatically
apply the brakes if your foot is
resting on the accelerator pedal.
You could crash into a vehicle
ahead of you.
Curves in the Road
{Warning
On curves, ACC may not detect a
vehicle ahead in your lane. You
could be startled if the vehicle
accelerates up to the set speed,
especially when following a vehicle
exiting or entering exit ramps. You
could lose control of the vehicle or
crash. Do not use ACC while driving
on an entrance or exit ramp. Always
be ready to use the brakes if
necessary.
{Warning
On curves, ACC may respond to a
vehicle in another lane, or may not
have time to react to a vehicle in
your lane. You could crash into a
vehicle ahead of you, or lose control
of your vehicle. Give extra attention
in curves and be ready to use the
brakes if necessary. Select an
appropriate speed while driving in
curves.
ACC may operate differently in a
sharp curve. It may reduce the vehicle
speed if the curve is too sharp.
If equipped, the curve speed control
indicator
nmay illuminate green
when ACC is actively controlling the
vehicle speed and detects a sharp
curve on the road ahead.
ACC automatically slows the vehicle
down while navigating the curve and
may increase speed out of the curve,
but will not exceed the set speed.
When following a vehicle and entering
a curve, ACC may not detect the
vehicle ahead and accelerate to the set
speed. When this happens, the vehicle
ahead indicator will not appear.
ACC may detect a vehicle that is not
in your lane and apply the brakes.
ACC may occasionally provide an alert
and/or braking that is considered
unnecessary. It could respond to
vehicles in different lanes, signs,

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
260 DRIVING AND OPERATING
ice, dirt, or mud. These areas need to
be cleaned for ACC to operate
properly.
If ACC will not operate, regular Cruise
Control may be available. See
“Switching Between ACC and Regular
Cruise Control”previously in this
section. Always consider driving
conditions before using either cruise
control system.
For cleaning instructions, see
“Washing the Vehicle ”under Exterior
Care 0370.
System operation may also be limited
under snow, heavy rain, or road spray
conditions.
Super Cruise
If equipped, Super Cruise can steer to
maintain lane position under certain
conditions on Super Cruise-enabled
roads that are separated from
opposing traffic.
Super Cruise can also steer to perform
a lane change under certain
conditions on Super Cruise-enabled
roads when a lane change is initiated
by the driver using the turn signal lever. See
“Super Cruise Lane Change ”
later in this section and Turn and
Lane-Change Signals 0129.
{Warning
Super Cruise can only assist to
maintain lane position, or steer to
change lanes, when driving on
compatible roads. You must
supervise the driving task and
monitor the road conditions. You
may need to respond to traffic
events by steering, braking,
or accelerating. See Defensive
Driving.
Super Cruise is:
.Not a self-driving system
.Not a crash avoidance or warning
system
.Not a substitute for proper
supervision of the driving task.
Super Cruise uses the following to
detect the current lane position and
lane markings ahead on compatible
roads under certain conditions:
.Cameras
.Global Positioning System (GPS)
sensing
.A high-precision map
.GPS-enhancement data downloaded
through Connected Services
Super Cruise works with Adaptive
Cruise Control (ACC), which controls
acceleration and braking while Super
Cruise is enabled and operating.
Review and understand both this
section and the ACC section before
using Super Cruise. See Adaptive
Cruise Control (Advanced) 0251.
An active Super Cruise service plan is
required to use Super Cruise.
{Warning
Super Cruise does not perform all
aspects of driving, nor does it do
everything a driver can do. Super
Cruise only steers to maintain
vehicle position in the current lane
or, under some circumstances, to
change lanes. Super Cruise can only
be used with Adaptive Cruise
Control. (Continued)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 261
Warning (Continued)
Super Cruise does:
.Not prevent crashes or warn of
possible crashes.
.Not steer to avoid stopped or
slow-moving vehicles,
cross-traffic, construction
barriers or cones, motorcycles,
children, pedestrians, animals,
or other objects on the road.
.Not steer in response to vehicles
or objects next to your vehicle,
including vehicles attempting to
enter your lane.
.Not respond to traffic lights, stop
signs, or other traffic control
devices.
.Not respond to crossing traffic.
.Not make turns.
.Not steer to merge onto or to
exit highways.
.Not detect, steer to avoid,
or steer through construction
zones.
.Not function on surface streets.(Continued)
Warning (Continued)
.Not respond to crossing or
oncoming traffic.
.Not function in city driving
conditions.
{Warning
Some state and local laws may
require hands to be kept on the
steering wheel at all times. Only
remove your hands from the
steering wheel if Super Cruise is
engaged, it is safe to do so, and it is
permitted by state and local laws.
Failure to do so may result in a
crash involving serious injury or
death.
{Warning
Failure to supervise the driving task
and to respond appropriately, even
while Super Cruise is operating, can
cause a crash. Super Cruise may not
(Continued)
Warning (Continued)
respond as you would to all driving
situations and may not maintain
lane position under all conditions.
It is extremely important to pay
attention to the operation of the
vehicle, even while using Super
Cruise. Do not use a hand-held
device while driving, even with
Super Cruise engaged. To prevent
serious injury or death:
.Always remain properly seated in
the driver seat with your seat
belt fastened.
.Never remove your hands from
the steering wheel when Super
Cruise is not operating.
.Always make sure traffic
conditions are safe before using
Super Cruise.
.Always keep the entire vehicle
and the sensors clean. Sensors
are on the front, sides, and rear
of the vehicle.(Continued)