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GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Driving and Operating 251
may feel or sound different than if
the brakes were applied manually.
This is normal.
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 in front of your vehicle
that have a rear aspect that is
low, small, or irregular
. An empty truck or trailer that has
no cargo in the cargo bed
. 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
. Vehicles that are low to the road
surface
. Objects that are close to the
front of your vehicle
. Vehicles on which extremely
heavy cargo is loaded in the
cargo area or rear seat
ACC Automatically Disengages
ACC may automatically disengage
and the driver will need to manually
apply the brakes to slow the
vehicle if:
.
The front camera is blocked or
visibility is reduced.
. The Traction Control System
(TCS) or StabiliTrak/ESC system
has activated or been disabled.
. There is a fault in the system.
. A DIC message displays to
indicate that ACC is temporarily
unavailable.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
252 Driving and Operating
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when ACC is no longer active.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”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” under
Vehicle Personalization 0157. When the vehicle ahead drives
away, 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 0233.
A DIC warning message may
display indicating to shift to P (Park)
before exiting the vehicle. See
Vehicle Messages 0156.
{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
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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Driving and Operating 257
Information Center (DIC) messages
may display when the systems are
unavailable or blocked..Front and rear bumpers and the
area below the bumpers
. Front grille and headlamps
. Front camera lens in the front
grille or near the front emblem
. Front side and rear side panels
. Outside of the windshield in front
of the rearview mirror
. Side camera lens on the bottom
of the outside mirrors
. Rear side corner bumpers
. Rear Vision Camera in the
tailgate handle
. Rear Camera Mirror and Cargo
View Camera in the Center
High-Mounted Stoplamp
Assistance Systems for
Parking or Backing
If equipped, the Rear Vision Camera
(RVC), Surround Vision, Rear Park
Assist (RPA), Front Park Assist
(FPA), and Rear Cross Traffic Alert
(RCTA) may help the driver park or avoid objects. Always check around
the vehicle when parking or
backing.
The RVC, RPA, and Surround
Vision will not work properly if the
tailgate is down. If the tailgate is
down, do not use these systems.
Rear Vision Camera (RVC)
When the vehicle is shifted into
R (Reverse), the RVC displays an
image of the area behind the vehicle
in the infotainment display. The
previous screen displays when the
vehicle is shifted out of R (Reverse)
after a short delay. To return to the
previous screen sooner, press any
button on the infotainment system,
shift into P (Park), or, while in D
(Drive), reach a vehicle speed of
approximately 12 km/h (8 mph). The
rear vision camera is in the tailgate
handle.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
258 Driving and Operating
1. View Displayed by the RearVision Camera
1. View Displayed by the RearVision Camera
2. Corners of the Rear Bumper
Displayed images may be farther or
closer than they appear. The area
displayed is limited and objects that
are close to either corner of the
bumper or under the bumper do not
display.
A warning triangle may display to
show that Rear Park Assist (RPA)
has detected an object. This triangle
changes from amber to red and
increases in size the closer the
object.
If equipped with Hitch View, see
“Surround Vision” following.
Surround Vision
If equipped the Surround Vision
system can display various views
surrounding the vehicle in the
infotainment display. See below for
camera view descriptions and more
information.
{Warning
The Surround Vision cameras
have blind spots and will not
display all objects near the
corners of the vehicle. Folding
outside mirrors that are out of
position may not display surround
view correctly. Always check
around the vehicle when parking
or backing.
1. Views Displayed by the
Surround Vision Cameras
2. Area Not Shown

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Driving and Operating 259
1. Views Displayed by theSurround Vision Cameras
2. Area Not Shown
{Warning
The camera(s) do not display
children, pedestrians, bicyclists,
crossing traffic, animals, or any
other object outside of the
cameras’ field of view, below the
bumper, or under the vehicle.
Shown distances may be different
from actual distances. Do not
drive or park the vehicle using
only these camera(s). Always
check behind and around the
(Continued)
Warning (Continued)
vehicle before driving. Failure to
use proper care may result in
injury, death, or vehicle damage.
Camera Views
Touch the camera view buttons
along the bottom of the infotainment
display to access each view (if
equipped):
1. Front/Rear Standard View
Displays an image of the
area in front or behind the
vehicle. To select, touch
Front/Rear Standard View
on the infotainment display
when a camera view is
active. Touch the button to
toggle between front and
rear camera views.
When the hitch guidance is
selected, Rear Standard
View will remain visible
across gear changes,
otherwise the view will
toggle between Front and
Rear Standard View based
on gear position.
If equipped, the front view
camera also displays when
the Park Assist system
detects an object within
30 cm (12 in).
2. Front/Rear Overhead View
Displays a front or rear
overhead view of the
vehicle. To select, touch
Front/Rear Top-Down View
on the infotainment display
when a camera view is

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
260 Driving and Operating
active. Touch the button to
toggle between front and
rear camera views.
3. Rear Bowl View
Displays a perspective view
of the vehicle from the front
looking rearward. To select,
touch Rear Bowl View on
the infotainment display
when a camera view is
active. Park Assist and
Rear Cross Traffic Alert
(RCTA) overlays are not
available when bowl view is
active.
4. Front/Rear side View
Displays a view that shows
objects next to the front or
rear sides of the vehicle. To
select, touch Front/Rear
Side View on the
infotainment display when a
camera view is active.
Touch the button to toggle
between front and rear
camera views. Park Assist
and RCTA overlays are not
available when Front/Rear
Side View is active.The Turn Signal Activated
View works with Rear Side
View to provide a rearward
view of the left or right side
of the vehicle and trailer.
Views are provided based
on turn signal activation
with the right-side view
being shown when the right
turn signal is active and the
left side view being shown
when the left turn signal is
active. The feature is
available when a trailer is
connected. The feature can
be enabled or disabled.
See
Vehicle Personalization
0 157. Touch X to exit.
5. Surround View
Displays an image of the
area surrounding the
vehicle. Surround View is
available as part of the
Front/Rear Standard Views,
the Front/Rear Top-Down
Views and the Front/Rear
Side Views. In these views
Surround View can be
enabled by touching Surround View on the
infotainment display when
the camera view is active.
6. Guidance Lines/Hitch
Guidance
Guidance Lines displays
available guidelines,
including Standard and
Hitch Guidance.
A grayed-out icon indicates
that guidelines are not
available. To enable, touch
Guidance Lines on the
infotainment display when a
camera view is active.
Touching the button
multiple times will toggle
through Standard
Guidelines, Hitch Guidance
and no guidelines.
Standard guidelines are
available in Front/Rear
Standard Views, Front/Rear
Top-Down Views and
Surround View.
Hitch Guidance displays a
single centered guideline
on the infotainment display
to assist with aligning the

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Driving and Operating 261
vehicle’s hitch ball with a
trailer coupler. Touch the
Hitch Guidance icon, then
align the trailer guidance
line over the trailer coupler.
Continuously steer the
vehicle to keep the
guideline centered on the
coupler when backing. Park
Assist overlays will not
display when the trailer
guidance line is active.
Hitch Guidance is available
in Rear Standard View.
{Warning
Use Hitch Guidance only to help
back the vehicle to a trailer hitch
or, when traveling above 12 km/h
(8 mph), to briefly check the
status of your trailer. Do not use
for any other purpose, such as
making lane change decisions.
Before making a lane change,
always check the mirrors and
glance over your shoulder.
Improper use could result in
serious injury to you or others.
7. Interior Trailer View
Provides a view of the
interior of the trailer. The
feature is available when a
trailer is connected. The
feature requires user
installation of an accessory
trailer camera on the
interior of the trailer per the
accessory trailer camera
installation instructions (see
your dealer for accessory
trailer camera(s) and
information). To select,
touch Interior Trailer View
on the infotainment display
when a camera view is
active. To access this view
when in a forward gear
above 12 km/h (8 mph),
touch CAMERA on the
infotainment display and
touch the Interior Trailer
View icon. The view will
close after 8 seconds and
can be closed early by
touching X.
8. Hitch View
Assists with connecting to a
trailer by providing a
zoomed-in view of the hitch
to help align the vehicle’s
hitch ball with the trailer
coupler, or to monitor the
trailer connection. To select,
touch Hitch View on the
infotainment display when a
camera view is active. To
access this view when in a
forward gear above 12 km/h
(8 mph), touch CAMERA on
the infotainment display
and touch the Cargo Bed
View icon. The view will
close after 8 seconds and
can be closed early by
touching X. Shifting into
P (Park) while in this view
will automatically engage
the Electric Parking
Brake (EPB).
9. Bed View
Provides a view of the truck
bed and the area behind
the vehicle to assist in
cargo or hitch monitoring or
hitching to a fifth wheel or

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
262 Driving and Operating
gooseneck trailer. To select,
touch Bed View on the
infotainment display when a
camera view is active. To
access this view when in a
forward gear above 12 km/h
(8 mph), touch CAMERA on
the infotainment display
and touch the Bed View
icon. The view will close
after 8 seconds and can be
closed early by touching X.
10. Transparent Trailer View
Provides a view that allows
the driver to virtually“see
through” the trailer. The
feature is available when a
compatible trailer is
connected and a profile is
configured and selected via
the Trailering App. See
Trailering App 0310. The
feature requires user
installation of an accessory
trailer camera on the rear
exterior surface of the
trailer per the accessory
trailer camera installation
instructions (see your dealer for accessory trailer
camera(s) and information).
To select, touch
Transparent Trailer View on
the infotainment display
when a camera view is
active. To access this view
when in a forward gear
above 12 km/h (8 mph),
touch CAMERA on the
infotainment display and
touch the Transparent
Trailer View icon. Touch X
to exit.
When the system is
calibrated and the trailer
position is known, one of
three views will be shown;
Transparent Trailer View,
Left Transparent Trailer
View or Right Transparent
Trailer View. The
Transparent Trailer View is
shown when the position of
the trailer is relatively
straight behind the vehicle.
The Left or Right
Transparent Trailer View is
shown when the position of
the trailer is too far to theleft or right. When the
system is not calibrated or
trailer position is not known
the Transparent Trailer
Picture-in-Picture View will
be shown.
11. Rear Trailer View/Rear Side
View with Available
Articulation Functionality/
Picture-in-Picture Side View
.Rear Trailer View
provides a view of the
area behind the trailer.
the feature is available
when a trailer is
connected. The feature
requires user installation
of an accessory trailer
camera on the rear
exterior surface of the
trailer per the accessory
trailer camera
installation instructions
(see your dealer for
accessory trailer
camera(s) and
information). To select,
touch Rear Trailer View/
Rear Side View with

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
Driving and Operating 263
Available Articulation
Functionality/
Picture-in-Pictue Side
View on the
infotainment display
when a camera view is
active. Each touch will
toggle through the Rear
Trailer View, Trailer Tow
Mirror View and Combo
View. To access this
view when in a forward
gear above 12 km/h
(8 mph), touch
CAMERA on the
infotainment display and
touch the Interior Rear
Trailer View/Rear Side
View with Available
Articulation
Functionality/
Picture-in-Picture Side
View icon. Touch X
to exit.
. Rear Side View with
Available Articulation
Functionality provides a
rearward split view of
the left and right sides
of the vehicle and trailer. When in a forward gear
the view well
automatically pan to
show more of the left or
right side based on the
position of the trailer.
The feature is available
when a trailer is
connected. To select,
touch Rear trailer View/
Rear Side View with
Available Articulation
Functionality/
Picture-in-Picture Side
View on the
infotainment display
when a camera view is
active. Each touch will
toggle through the Rear
Trailer View, trailer tow
Mirror view and Combo
View. To access this
view when in a forward
gear above 12 km/h
(8 mph), Touch
CAMERA on the
infotainment display and
touch the Rear Trailer
View/Rear Side View
with Available
Articulation
Functionality/
Picture-in-Picture Side
icon. Touch X to exit.
. Provides a rearward
split view of the left and
right sides of the vehicle
and trailer with an
overlay view of the area
behind the trailer. The
feature is available
when a trailer is
connected. the feature
requires user installation
of an accessory trailer
camera on the rear
exterior surface of the
trailer per the accessory
trailer camera
installation instructions
(see your dealer for
accessory trailer
camera(s) and
information). To select,
touch Rear Trailer View/
Rear Side View with
Available Articulation
Functionality/
Picture-in-Picture Side
view on the infotainment

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 4/4/19
264 Driving and Operating
display when a camera
view is active. Each
press of the button will
toggle through the Rear
Trailer View, Trailer Tow
mirror View and Combo
View. To access this
view when in a forward
gear above 12 km/h
(8 mph), touch
CAMERA on the
infotainment display and
touch the Rear Trailer
View/Rear Side View
with Available
Articulation
Functionality/
Picture-in-Picture Side
View icon. Touch X
to exit.
HD Surround Vision with Trailer
Camera Provisions
If equipped, this feature provides
additional views to aid in trailering/
towing. The system shows multiple
views in the infotainment display
using five cameras mounted around
the vehicle and up to two additional
accessory cameras that can be mounted on or in a trailer. The front
camera is in the grille under the
front emblem, the side cameras are
on the bottom of the outside mirrors,
the rear camera is in the tailgate
handle and the bed camera is
mounted on the rear of the cab.
Additionally, up to two accessory
cameras can be mounted to the rear
and/or interior of the trailer. See
your dealer for accessory trailer
cameras. To access, touch
CAMERA on the infotainment
display or shift to R (Reverse). To
return to the previous screen when
not in reverse, touch the Home or
Back buttons on the infotainment
display.
Available camera views:
.
Front/Rear Standard View
. Front/Rear Top-Down View
. Rear Bowl View
. Front/Rear Side View
. Hitch View
. Bed View
. Rear trailer View .
Rear Side view with a available
articulation functionality
. Picture-in-Picture Side View
. Interior Trailer View
. Transparent trailer View
. Surround View
. Guidance Lines
. Hitch Guidance
Surround Vision (360 Degrees)
If equipped, the Surround Vision
system can display various views
surrounding the vehicle in the
infotainment display using four
cameras mounted around the
vehicle. The front camera is in the
grille under the front emblem, the
side cameras are on the bottom of
the outside mirrors, and the rear
camera is in the tailgate handle.
The Surround Vision system can be
accessed by selecting CAMERA in
the infotainment display or when the
vehicle is shifted into R (Reverse).
To return to the previous screen
sooner, when not in R (Reverse),
press the Home or Back button on