2021 CADILLAC CT4 cruise control

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when ACC is no longer active.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
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)

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
262 DRIVING AND OPERATING
Warning (Continued)
.Always observe posted speed
limits. Only use Super Cruise at
or below the posted speed limit.
Super Cruise should not be used in
complex or uncertain driving
conditions, including:
.Not in construction zones.
.Not when approaching or exiting
toll plazas.
.Not when approaching an
intersection that is controlled
with a traffic light, stop sign,
or other traffic control device.
.Not when lane markings are not
present or cannot be detected.
For example, there is too much
glare, weather conditions are
poor, or lanes are poorly marked.
.Not on slippery or icy roads.
.Not in adverse weather
conditions, including rain, sleet,
fog, ice, or snow.
.Not on winding or hilly roads.
.Not for city driving. (Continued)
Warning (Continued)
.Not during heavy or emergency
braking.
.Not on surface streets.
.Not on a road shoulder, service
drive, or under an elevated
freeway.
.Not in tunnels.
.Not when towing a trailer.
.Not in a highway exit lane.
When Super Cruise is Available
Super Cruise Indicator
Super Cruise is designed to operate
only when:
.ACC is on. See Adaptive Cruise
Control (Advanced) 0251.
.Teen Driver is not active.
.The GPS detects the vehicle is on a
compatible highway.
.Both the camera and the radar
sensors are functioning and not
covered, obstructed, or damaged.
.The Driver Attention System (DAS)
detects the driver's head and eyes
are directed toward the road.
.The lane markings are clearly visible
and able to be detected by the
system.
Poor Conditions
Poor Conditions

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 263
Using Super Cruise
{Warning
To prevent serious injury or death:
.Always check that Super Cruise
is available
^before
pressing
].
.Only remove your hands from
the steering wheel if the steering
wheel light bar,
^, and\are
green. Super Cruise may not
begin steering immediately, even
when Super Cruise is available
and
]has been pressed.
To engage:
.PressJto turn on ACC. Make sure
the white
\indicator displays in
the instrument cluster. See Adaptive
Cruise Control (Advanced) 0251.
.When Super Cruise is available, the
white
^will display in the
instrument cluster.
.Press]. ACC will set the speed at
the current vehicle speed. If ACC
has a previously set speed, it may
resume at that speed.
.Super Cruise, when engaged, will
change Forward Collision System
customization to Alert and Brake.
When engaged and not steering the
vehicle, the steering wheel light bar
flashes blue, and
^will be blue. The
driver is in control of steering and
Super Cruise is not steering the
vehicle.
When the vehicle is positioned in the
center of the lane, the steering wheel
light bar and
^display will turn
green, indicating Super Cruise is
steering the vehicle. When Super Cruise controls the
steering, traffic and other conditions
and laws permit, and it is safe to do
so, your hands can be taken off the
steering wheel.
Always pay attention to the road and
the operation of the vehicle. Always
monitor and be attentive of
surrounding traffic, including vehicles
that may cross the road in front of
your vehicle.
Super Cruise steering can be
overridden with manual steering at
any time. When Super Cruise is
engaged, always be prepared to take
immediate action
—including
steering, accelerating, and braking
quickly, if necessary.
Steering Manually and Changing
Lanes
The vehicle can always be manually
steered, even with Super Cruise
engaged; for example, when changing
lanes.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 265
Take Over Alert
{Warning
Super Cruise will not maintain the
vehicle’s speed while the steering
wheel light bar is flashing red.
If the steering wheel light bar
flashes red, immediately resume
manual steering to prevent serious
injury or death. If you do not
resume manual steering, the vehicle
will begin to slow in the same lane
and eventually come to a complete
stop on the road.
Any time the steering wheel light bar
flashes red, resume manual steering
immediately. The instrument cluster
light
^, will also turn red and a
message will display in the Driver
Information Center (DIC). In addition,
beeps will sound, or the Safety Alert
Seat will vibrate. See “Collision/
Detection Systems” underVehicle
Personalization 0117. After you begin
steering manually, then Super Cruise
will disengage. The red flashing steering wheel light
bar could occur under any of the
following conditions:
.Lane markings are poor, or visibility
is limited.
.The Driver Attention System (DAS)
does not detect that the driver's
head and eyes are directed toward
the road.
.ACC is canceled.
.The vehicle is on a tight curve,
or the lanes are too wide, or the
vehicle goes into a curve too fast.
.The compatible road ends.
.The vehicle is approaching an
intersection controlled by a traffic
light, stop sign, or other traffic
control device.
.A Super Cruise system fault occurs.
Attention to the Road
{Warning
Super Cruise is a driver assistance
system and cannot accurately
detect or predict all situations.
Super Cruise is not a crash
avoidance system. To prevent
serious injury or death, 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 0204. Super Cruise also
cannot determine whether you are
awake, asleep, impaired, or properly
focused on safe driving. The vehicle
could crash into other vehicles,
drive out of the lane, or drive off
the road. Complete attention is
always required while driving, even
while using Super Cruise. Be
prepared to take over steering or
apply the brakes at any time.

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
266 DRIVING AND OPERATING
{Warning
To prevent serious injury or death,
be alert and pay special attention
when passing highway exits,
entrances, and crossings with Super
Cruise, and be ready to take control
of the vehicle when necessary.
Changes in lane markings around
exits and entrances can
momentarily cause Super Cruise to
not detect the correct lane. If this
occurs, Super Cruise may attempt
steering inputs to bring the vehicle
back into the correct lane and, in
rare circumstances, could
over-correct and cause the vehicle
to momentarily cross into a lane
next to your vehicle unless you
manually steer to maintain your
lane position.The Driver Attention System (DAS) on
the steering column continually
monitors driver head and eye position
to estimate driver attention to the
road. The camera does not record or
share pictures, audio, or video.
Sunglasses, hats, or other types of
clothing that change the shape of the
head may interfere with camera
performance. To improve camera
performance, raise or lower the
steering wheel, or change the seat
position.
Pay close attention to the road ahead
to avoid these three increasing alerts:

Cadillac CT4 Owner Manual (GMNA-Localizing-U.S./Canada-14584335) -
2021 - CRC - 12/4/20
DRIVING AND OPERATING 267
First Alert
.If the steering wheel light bar flashes green, the system has detected that your head and
eyes may not be directed toward the road.
.The flashing will stop when the system detects that your head and eyes appear to be
directed toward the road.
Second Alert
.If the steering wheel light bar flashes green for too long, Super Cruise will alert the driver
to take control of steering immediately by flashing the light bar red. Also, either beeps will
sound or the Safety Alert Seat will vibrate. See “Collision/Detection Systems”underVehicle
Personalization 0117.
.Take over steering, then Super Cruise will disengage.
.To re-engage Super Cruise, press]. See “Using Super Cruise ”previously in this section.
Third Alert
.If the steering wheel light bar flashes red for too long, a voice command will tell you to
take control of the vehicle.
.Take control of the steering immediately; ACC and Super Cruise will disengage.
.A DIC message will indicate that Super Cruise is locked out. Super Cruise cannot be
re-engaged until the next ignition cycle.
.Continued failure to take over steering will cause the vehicle to brake to a stop and OnStar
will be called. The brake lamps and hazard warning flashers will come on.
.Take control of the vehicle and continue driving.