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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.
With ACC active, 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.
Far Gap Setting
Medium Gap Setting
Near Gap Setting
If equipped, and a trailer is electrically
connected, the gap setting display will
be as follows:
Far Gap Setting with Trailer
Medium Gap Setting with Trailer
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Near Gap Setting with Trailer
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.
The gap setting used by ACC is
independent to the alert timing
sensitivity (Far, Medium, or Near)
used by the Forward Collision Alert
(FCA) feature. Pressing
[while ACC
is active will only modify the gap
setting used by ACC without changing
the alert timing sensitivity used by FCA. Pressing
[while ACC is not
active will only modify the alert
timing sensitivity used by FCA
without modifying the gap setting
used by ACC. See Forward Collision
Alert (FCA) System 0319.
Courtesy Gap
Press and hold
[on the steering
wheel when vehicle is moving to
temporarily increase the gap with the
vehicle ahead to allow for merging
traffic.
Press and hold
[when stopped to
cancel ACC from resuming
automatically (if the stop is brief) and
remain stationary. This can be used to
allow traffic to merge between you
and the vehicle ahead. Press RES+ or
the accelerator pedal to resume ACC.
Following distance gap will return to
the original selection after hold. Alerting the Driver
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. See
“Collision/Detection
Systems” underVehicle Personalization
0 140.
See Defensive Driving 0232.
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Approaching and Following a
Vehicle
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 the vehicle in front at the
selected following 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 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 (Continued)
Warning (Continued)
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.
.Objects that are close to the front of
your vehicle.
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ACC Automatically Disengages
ACC may automatically disengage and
the driver will need to manually apply
the brakes to slow the vehicle if:
.The sensors are blocked.
.The Traction Control System (TCS)
or Stabilitrack/ESC 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 active symbol 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 ”previously in this section.
Always consider driving conditions
before using either cruise control
system. Notification to Resume ACC
ACC will maintain a following 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
0 140.
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 0262.
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 0139.
{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.
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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) indicating ACC
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 (Continued)
Warning (Continued)
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.
The curve speed control indicator
n
may 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.
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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.
Towing with ACC
If equipped when towing a trailer, ACC
driving characteristics such as
following gap, acceleration rates and
braking rates may be modified to
provide a better towing experience. ACC should not be used while towing
a trailer with an aftermarket trailer
brake controller. Aftermarket trailer
brake controllers may not function
properly with the ACC system.
ACC may be used when towing a
trailer when trailer attached is within
GM-approved allowable size and
weight limits. See
Trailer Towing
0 340.
When towing a trailer with ACC, it is
important to properly set the Trailer
Gain. See “Integrated Trailer Brake
Control System ”in Towing Equipment
0 344 for Trailer Gain Adjustment
Procedure.
Use Tow/Haul mode when driving
down steep hills or mountain grades,
or when hauling heavy loads. See
Driver Mode Control 0267.
Disengaging ACC
There are three ways to
disengage ACC:
.Step lightly on the brake pedal.
.Press*.
.Press5.
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Erasing Speed Memory
The cruise control set speed is erased
from memory if
5is 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.
Accessory Installations and Vehicle
Modifications
Do not install or place any object
around the front camera windshield
area that would obstruct the front
camera view.
Do not install objects on top of the
vehicle that overhang and obstruct the
front camera, such as a canoe, kayak,
or other items that can be transported
on a roof rack system. See Roof Rack
System 0102.
Do not modify the hood, headlamps,
or fog lamps, as this may limit the
camera’s ability to detect an object. Cleaning the Sensing System
The camera sensor on the windshield
behind the rearview mirror and the
radar sensors on the front of the
vehicle can become blocked by snow,
ice, dirt, mud, or debris. 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 0444.
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.
A lane change can be initiated by the
driver using the turn signal lever.
The Super Cruise system may initiate
a lane change maneuver in following
scenarios:
.to pass slower traffic
.when the current lane is ending
ahead
.to return to the initial lane
See “Super Cruise Lane Change ”later
in this section and Turn and
Lane-Change Signals 0155.
{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
(Continued)
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Warning (Continued)
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 OnStar
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) 0275.
An active Connected Service plan that
includes Super Cruise Services 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.
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. (Continued)
Warning (Continued)
.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 steer to avoid, or steer
through construction zones.
.Not function on surface streets.
.Not respond to 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
(Continued)