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276 Driving and Operating
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.
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(Continued)
Warning (Continued)
use proper care when
driving may result in injury,
death, or vehicle damage.
See Defensive Driving 0240.
When the vehicle is stopped
on a grade, Hill Start Assist
(HSA) 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.
If the accelerator pedal is not
applied within a few minutes,
the Electric Parking Brake will
apply. 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.
Ride Control
Systems
Traction Control/
Electronic Stability
Control
System Operation
The vehicle has a Traction
Control System (TCS) and
StabiliTrak/Electronic Stability
Control (ESC). These systems
help limit wheel spin 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. On an All-Wheel Drive
(AWD) vehicle in AWD or Sport
Mode, the system will operate
if it senses that any of the
wheels are spinning or
beginning to lose traction.
When this happens, TCS
applies the brakes to the
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Driving and Operating 277
spinning wheels and reduces
engine power to limit
wheel spin.
StabiliTrak/ESC activates
when the system senses a
discrepancy 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 direction
which you are steering.
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. TCS and StabiliTrak/
ESC will automatically turn on
when cruise control is set.
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 diagnosticchecks. 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
0251 or
If the Vehicle Is Stuck 0251
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 XT6 Owner Manual (GMNA-Localizing-U.S./Canada-16405819) -
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280 Driving and Operating
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.
With cruise control, a speed of
about 40 km/h (25 mph) or
more can be maintained
without keeping your foot on
the accelerator. Cruise control
does not work at speeds
below about 40 km/h (25 mph). If the Traction Control System
(TCS) or StabiliTrak/Electronic
Stability Control (ESC) system
begins to limit wheel spin while
using cruise control, cruise
control automatically
disengages. See Traction
Control/Electronic Stability
Control
0276. If a collision
alert occurs when cruise
control is activated, cruise
control is disengaged. See
Forward Collision Alert (FCA)
System 0326. When road
conditions allow cruise control
to be safely used, it can be
turned back on.
Cruise control will disengage if
either TCS or StabiliTrak/ESC
is turned off.
If the brakes are applied,
cruise control disengages.
J: Press to turn the system
on and off. A white indicator
appears in the instrument
cluster when cruise is
turned on.
RES+ : If there is a set speed
in memory, move the
thumbwheel up briefly to
resume that speed or move
the thumbwheel up and hold
to accelerate. If cruise control
is already active, use to
increase vehicle speed. To
increase speed by 1 km/h
(1 mph), press RES+ to the first
detent. To increase speed to
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Driving and Operating 281
the next 5 km/h (5 mph) mark
on the speedometer, press
RES+ to the second detent.
SET−:Move the thumbwheel
down briefly to set the speed
and activate cruise control.
If cruise control is already
active, use to decrease vehicle
speed. 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 cruise
control without erasing the
set speed from memory.
Setting Cruise Control
If
Jis on when not in use,
SET− or RES+ could get
pressed and go into cruise
when not desired. Keep
Joff
when cruise is not being used.
1. Press
J.
2. Get up to the desired speed. 3. Move the thumbwheel
down toward SET− and
release. The desired set
speed briefly appears in
the instrument cluster.
4. Remove your foot from the accelerator.
When cruise control has been
set to the desired speed, a
green cruise control indicator
appears on the instrument
cluster and a cruise set speed
message appears on the
Head-Up Display (HUD),
if equipped.
Resuming a Set Speed
If cruise control is set at a
desired speed and then the
brakes are applied or
*is
pressed, cruise control is
disengaged without erasing
the set speed from memory.
Once the vehicle speed
reaches about 40 km/h
(25 mph) or more, move the
thumbwheel up toward RES+
briefly. The vehicle returns to
the previous set speed. Increasing Speed While Using
Cruise Control
If the cruise control system is
already activated:
.Move the thumbwheel up
toward RES+ until the
desired speed is reached.
.To increase vehicle speed in
small increments, briefly
press RES+ to the first
detent. For each press, the
vehicle goes about 1 km/h
(1 mph) faster.
.To increase vehicle speed in
larger increments, briefly
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 speedometer reading can
be displayed in either English
or metric units. See
Instrument Cluster 0127. The
increment value used depends
on the units displayed.
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Driving and Operating 283
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
Statement0477.
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 ACC is controlling
your vehicle speed when the
traction control system (TCS)
or StabiliTrak electronic stability control system
activates, ACC may
automatically disengage. See
Traction Control/Electronic
Stability Control
0276. When
road conditions allow ACC to
be safely used, ACC can be
turned back on.
Disabling the TCS or
StabiliTrak/ESC system will
disengage and prevent
engagement of ACC.
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
(Continued)
Warning (Continued)
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 0240.
{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 may
(Continued)
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Driving and Operating 285
Switching Between ACC and
Regular Cruise Control
To switch between ACC and
regular cruise control, press
and hold
*. A Driver
Information Center (DIC)
message displays. See Vehicle
Messages 0151.
ACC Indicator
(Base Level)ACC Indicator (Uplevel)
Regular Cruise Control Indicator When ACC is engaged, a
green
oindicator will be lit on
the instrument cluster and the
following gap will be displayed.
When the regular cruise
control is engaged, a green
J
indicator will be lit on the
instrument cluster; the
following gap will not display.
It is recommended to switch
from ACC to regular cruise
control only, when there are
no vehicles ahead of your
vehicle.
When the vehicle is turned on,
the cruise control mode will be
set to the last mode used
before the vehicle was
turned off.
{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
(Continued)
Warning (Continued)
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 engage 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
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286 Driving and Operating
25 km/h (15 mph). The minimum
allowable set speed is 25 km/h
(15 mph).
To set ACC while moving:1. Press
o.
2. Get up to the desired speed.
3. Press and release SET–.
4. Remove your foot from the accelerator pedal.
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 the ACC is set at a desired
speed and then the brakes are
applied, the ACC is
disengaged without erasing
the set speed from memory.
To begin using ACC again,
press RES+ up briefly.
.If the vehicle is moving more
than 5 km/h (3 mph), it
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, the
vehicle speed will increase to
the set speed under the
following conditions:
.There is no vehicle ahead.
.The vehicle ahead is beyond
the selected following gap.
.The vehicle speed is not
being limited because of a
sharp turn.
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
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The vehicle ahead indicator is
in the instrument cluster and
HUD display (if equipped).
It 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 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.