brake CADILLAC XT4 2023 Workshop Manual

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16412876) - 2023 - CRC - 3/25/22
Driving and Operating 277
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.
Increasing Speed While ACC
is at a Set Speed
If ACC is already activated, do
one of the following:
.Use the accelerator to get
to the higher speed. Briefly
press and release SET– and
release the accelerator
pedal. The vehicle will now cruise at the higher speed.
When the accelerator pedal
is pressed, ACC will not
brake because it is
overridden. While
overridden, the ACC
indicator will turn blue on the
instrument cluster and
heads up display,
if equipped.
.Press and hold RES+ until
the desired set speed is
displayed, then release it.
.To increase speed in small
increments, press RES+ to
the first detent. For each
press, the vehicle goes
1 km/h (1 mph) faster.
.To increase speed in larger
increments, press RES+ to
the second detent. For each
press, the vehicle speed
increases to the next 5 km/h
(5 mph) mark on the
speedometer.
The set speed can also be
increased while the vehicle is
stopped.
.If stopped with the brake
applied, press RES+ until the
desired set speed is
displayed.
.If ACC is holding the vehicle
at a stop and there is
another vehicle directly
ahead, pressing RES+ will
increase the set speed.
.Pressing RES+ when there is
no longer a vehicle ahead or
the vehicle ahead is pulling
away and the brake is not
applied will cause the ACC to
resume.
When it is determined that
there is no vehicle ahead or
the vehicle ahead is beyond
the selected following gap,
then the vehicle speed will
increase to the set speed.
The speedometer reading can
be displayed in either English
or metric units. See
Instrument Cluster 0119. The
increment value used depends
on the units displayed.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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278 Driving and Operating
Reducing Speed While ACC is
at a Set Speed
If ACC is already activated, do
one of the following:
.Use the brake to get to the
desired lower speed.
Release the brake and press
SET–. The vehicle will now
cruise at the lower speed.
.Press and hold SET– until
the desired lower speed is
reached, then release it.
.To decrease speed in
smaller increments, press
SET− to the first detent. For
each press, the vehicle goes
about 1 km/h (1 mph) slower.
.To decrease speed in larger
increments, press SET− to
the second detent. For each
press, the vehicle speed
decreases to the next
5 km/h (5 mph) mark on the
speedometer.
The set speed can also be
decreased while the vehicle is
stopped.
.If stopped with the brake
applied, press or hold SET−
until the desired set speed is
displayed.
Selecting the Follow
Distance Gap
When a slower moving vehicle
is detected ahead within the
selected following gap, ACC
will adjust the vehicle's speed
and attempt to maintain the
follow distance gap selected.
Press
[on the steering
wheel to adjust the following
gap. Each press cycles the gap
button through three settings:
Far, Medium, or Near.
When pressed, the current
gap setting displays briefly on
the instrument cluster and
HUD, if equipped. The gap
setting will be maintained until
it is changed.
Since each gap setting
corresponds to a following
time (Far, Medium, or Near),
the following distance will vary
based on vehicle speed. The faster the vehicle speed, the
further back your vehicle will
follow a vehicle detected
ahead. Consider traffic and
weather conditions when
selecting the following gap.
The range of selectable gaps
may not be appropriate for all
drivers and driving conditions.
Changing the gap setting
automatically changes the
alert timing sensitivity (Far,
Medium, or Near) for the
Forward Collision Alert (FCA)
feature. See Forward Collision
Alert (FCA) System
0297.
Alerting the Driver
With Head-Up Display

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Driving and Operating 279
Without Head-Up Display
If ACC is engaged, driver
action may be required when
ACC cannot apply sufficient
braking because of
approaching a vehicle too
rapidly.
When this condition occurs,
the collision alert symbol will
flash on the windshield. Either
eight beeps will sound from
the front, or both sides of the
Safety Alert Seat will pulse
five times. Touch the Settings
icon on the infotainment home
page. Select “Vehicle”to
display the list of available
options and select “Collision/
Detection Systems”.
See Defensive Driving 0230. 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 for vehicles ahead.
ACC automatically slows the
vehicle down and adjusts
vehicle speed to follow the
vehicle in front at the selected
follow gap. The vehicle speed
increases or decreases to
follow the vehicle in front of
you, but will not exceed the
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
(Continued)

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280 Driving and Operating
Warning (Continued)
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 (Continued)
Warning (Continued)
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.
.Objects that are close to the
front of your vehicle.
ACC Automatically
Disengages
ACC may automatically
disengage and the driver 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 is
temporarily unavailable,
regular cruise control may be
used. See “Switching Between
ACC and Regular Cruise
Control” in this section. Always
consider driving conditions
before using either cruise
control system.

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Driving and Operating 281
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. Touch the
Settings icon on the
infotainment home page.
Select“Vehicle” to display the
list of available options and
select ”Alert Type” and
“Adaptive Cruise Go Notifier”
in “Collision/Detection
Systems”.
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
0264.
To release the EPB, press the
accelerator pedal.
A DIC warning message may
display indicating to shift to
P (Park) before exiting the
vehicle. See Vehicle Messages
0 143.
{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 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 (Continued)

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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282 Driving and Operating
Warning (Continued)
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.
When following a vehicle and
entering a curve, ACC may not
detect the vehicle ahead and
may 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.

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Driving and Operating 283
ACC may occasionally provide
an alert and/or braking that is
considered unnecessary.
It could respond to vehicles in
different lanes, signs,
guardrails, and other
stationary objects when
entering or exiting a curve.
This is normal operation. The
vehicle does not need service.
Other Vehicle Lane Changes
ACC will not detect a vehicle
ahead until it is completely in
the lane. The brakes may need
to be manually applied.Objects Not Directly in Front
of Your Vehicle
The detection of objects in
front of the vehicle may not be
possible if:
.The vehicle or object ahead
is not within your lane.
.The vehicle ahead is shifted,
not centered, or is shifted to
one side of the lane.
Driving in Narrow Lanes
Vehicles in adjacent traffic
lanes or roadside objects may
be incorrectly detected when
located along the roadway.
Do Not Use ACC on Hills
Do not use ACC when driving
on steep hills as ACC may not
detect a vehicle ahead.
Do Not Use ACC When
Towing a Trailer
ACC should not be used when
towing a trailer.
Disengaging ACC
There are three ways to
disengage ACC:
.Step lightly on the brake
pedal.
.Press*.
.PressJ.
Erasing Speed Memory
The cruise control set speed is
erased from memory if
Jis
pressed or if the ignition is
turned off.
Weather Conditions
Affecting ACC
System operation may be
limited under snow, heavy rain,
or road spray conditions.

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Driving and Operating 285
Warning (Continued)
Under many conditions,
these systems will not:
.Detect children,
pedestrians, bicyclists,
or animals.
.Detect vehicles or objects
outside the area
monitored by the system.
.Work at all driving speeds.
.Warn you or provide you
with enough time to avoid
a crash.
.Work under poor visibility
or bad weather conditions.
.Work if the detection
sensor is not cleaned or is
covered by ice, snow, mud,
or dirt.
.Work if the detection
sensor is covered up, such
as with a sticker, magnet,
or metal plate.(Continued)
Warning (Continued)
.Work if the detection
sensor viewing zone is
interrupted by an installed
accessory, such as a bike
rack, or hitch mounted
cargo carrier.
.Work if the area
surrounding the detection
sensor is damaged or not
properly repaired.
Complete attention is
always required while
driving, and you should be
ready to take action and
apply the brakes and/or
steer the vehicle to avoid
crashes.
Audible or Safety Alert Seat
Some driver assistance
features alert the driver of
obstacles by beeping. To view
available settings for this
feature, touch the Settings
icon on the infotainment home
page. Select “Vehicle”to display the list of available
options and select
“Comfort
and Convenience”.
If equipped with the Safety
Alert Seat, the driver seat
cushion may provide a
vibrating pulse alert instead of
beeping. To view available
settings for this feature, touch
the Settings icon on the
infotainment home page.
Select “Vehicle” to display the
list of available options and
select “Collision/Detection
Systems”.
Cleaning
Depending on vehicle options,
keep these areas of the
vehicle clean to ensure the
best driver assistance feature
performance. Driver
Information Center (DIC)
messages may display when
the systems are unavailable or
blocked.

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Driving and Operating 291
TheXbutton is used to turn
on or off the Park Assist,
which also turns on or off the
Backing Warning and Reverse
Automatic Braking (RAB) at
the same time. When the
system is turned off, a system
off message is shown on the
display. This message
disappears after a short
period of time.
Turn off Park Assist when
towing a trailer to prevent
unwanted beeps and when a
bike rack is attached to ensure
proper operation.
When the System Does Not
Seem to Work Properly
If a service message displays,
check the following conditions:
.The sensors may not be
clean. Keep the vehicle's
front and rear bumpers free
of mud, dirt, snow, ice, and
slush. For cleaning
instructions, see Exterior
Care 0412.
.The Park Assist sensors may
be covered by frost or ice.
Frost or ice can form around
and behind the sensors and
may not always be seen; this
can occur after washing the
vehicle in cold weather. The
message may not clear until
the frost or ice has melted.
If a service message displays
and the above conditions do
not exist, take the vehicle to
your dealer for repairs.
If the Park Assist System does
not activate due to a
temporary condition, a system
off message is shown on the
display. This can occur under
the following conditions:
.The driver has disabled the
system.
.An object is currently
blocking the rear sensors
(for example, bike rack,
tailgate, trailer hitch, etc.).
Once the object is removed,
Park Assist will return to
normal operation.
.The bumper is damaged.
Take the vehicle to your
dealer for repairs.
.Other conditions, such as
vibrations from a
jackhammer or the
compression of air brakes on
a very large truck, are
affecting system
performance.
Automatic Parking
Assist (APA)
Automatic Parking Assist
(APA) with Braking
If equipped, under certain
conditions APA with Braking
can use sensors based on
sonar technology along the
vehicle’s front, rear and sides
to detect a parking spot, and
automatically park the vehicle
with some driver assistance.
The vehicle will automatically
maneuver into a detected spot
moving at or near idle speed.
It does this by automatically
steering and braking while the
driver is responsible for

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Driving and Operating 293
APA selects the nearest
empty parking spot behind the
vehicle, but under some
conditions may select a space
that is further back. Slow
down and bring the vehicle to
a complete stop to begin.
Follow the displayed
instructions. When instructed
to drive in reverse, shift to
R (Reverse) while holding the
brakes. The steering wheel will
vibrate briefly as a reminder to
remove hands from the
steering wheel. After the
vibration stops, check your
surroundings and release the
brakes to begin automatic
parking. As the vehicle
automatically steers, and
brakes into the parking spot,
check surroundings and
continue to apply acceleration
if necessary and shift gears as
needed. Be prepared to stop
to avoid vehicles, pedestrians,
or objects.A progress arrow displays the
status of the parking
maneuver. Once automatic
parking is finished and the
vehicle has come to a full stop,
APA will beep and display a
message indicating parking is
complete. Shift the vehicle to
P (Park) and apply the parking
brake
Automatic Parking
Automatic Unparking
How to Cancel Automatic
Parking
To cancel automatic parking or
automatic unparking at any
time, press
O. Be prepared to
resume full control of the
vehicle. APA holds the vehicle
until the parking brake or
brake is applied, or the vehicle
is shifted into P (Park). To start
driving away, press the brakes
and shift into D (Drive).
Certain vehicle conditions and
driver interferences may also
cancel automatic parking:
.The driver manually steers
the vehicle.