2020 GMC SIERRA DENALI trailer

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
Driving and Operating 251
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.
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when ACC is no longer active.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 0156.
When the vehicle ahead drives
away, press RES+ or the
accelerator pedal to resume ACC.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
254 Driving and Operating
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 and
When Towing a Trailer
Do not use ACC when driving on
steep hills or when towing a trailer.
ACC will not detect a vehicle in the
lane while driving on steep hills.
If the brakes are applied, ACC
disengages.
Disengaging ACC
There are three ways to
disengage ACC:
.Step lightly on the brake pedal. .
Press
*.
. Press
J.
Erasing Speed Memory
The ACC set speed is erased from
memory if
Jis pressed or if the
ignition is turned off.
Weather Conditions Affecting ACC
If the interior temperature is
extremely high, the instrument
cluster may indicate that ACC is
temporarily unavailable. This can be
caused by extreme hot weather
conditions with direct sunlight on the
front camera. ACC will return to
normal operation once the cabin
temperature is lower.
Conditions that are associated with
low visibility, such as fog, rain,
snow, or road spray, may limit ACC
performance. Water droplets from
rain or snow that remain on the
windshield may also limit ACC’s
ability to detect objects. Lighting Conditions Affecting ACC
The ACC front camera can be
affected by poor lighting conditions,
and ACC may have limited
performance when:
.
There are changes in brightness,
such as entering and exiting
tunnels, bridges, and
overpasses.
. Low sun angles cause the
camera to not detect objects,
or it is more difficult to detect
objects in the same traffic lane.
. Lighting is poor in the evening or
early morning
. There are multiple changes in
brightness or shadows along the
vehicle roadway.
. In a tunnel without the
headlamps on, or in a tunnel
when there is a vehicle in front
that does not have its
taillamps on.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
260 Driving and Operating
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.
SeeVehicle Personalization
0 156. 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
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.
(Continued)

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
Driving and Operating 261
Warning (Continued)
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
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

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
262 Driving and Operating
the Trailering App. See
Trailering App0310. 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 the
left 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
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/

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
Driving and Operating 263
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
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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
264 Driving and Operating
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
the infotainment system, shift into
P (Park), or, while in D (Drive),
reach a vehicle speed of
approximately 12 km/h (8 mph).
Available camera views:
.
Front/Rear Standard View
. Front/Rear Top-Down View
. Rear Bowl View
. Front/Rear Side View
. Hitch View
. Surround View
. Guidance Lines
. Hitch Guidance

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
Driving and Operating 265
Surround Vision
If equipped, this feature provides,
additional views to aid in trailering/
towing. The Front Vision Camera
and Surround Vision cameras are
not supported. The system can
show various views in the
infotainment display using cameras
mounted in and around the vehicle
and trailer. The rear camera is in the
tailgate handle and the cargo bed
camera is mounted on the rear of
the cab. Up to two accessory
cameras can be mounted to the rear
and/or interior of the trailer. See
your dealer for these accessory
cameras.
The 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
the infotainment system or shift into
P (Park).Available camera views:
.
Rear Standard View
. Hitch View
. Bed View
. Rear Trailer View
. Interior Trailer View
. Guidance Lines
. Hitch Guidance
Troubleshooting
The Transparent Trailer calibration
may take longer than expected or
not calibrate if:
. The vehicle is driven too fast
during calibration. Speed should
be maintained below 50 km/h
(31 mph).
. The vehicle is not driven straight
during calibration. Steering
should be maintained as straight
as possible, excessive steering
during calibration may extend
calibration time. .
The calibration is attempted in
low light. Calibration should be
attempted when there is enough
light.
. The calibration is attempted
during adverse weather
conditions. Calibration during
conditions such as snow or
heavy rain should be avoided.
. The road surface is not ideal for
calibration. Calibration should be
attempted on an alternate road
surface.
. The accessory trailer cameras
are swapped at the hitch
connector. Ensure that the
camera mounted to the rear of
the trailer is connected to the
rear trailer camera input.
. The accessory trailer camera is
mounted, angled or rotated
outside of the defined mounting
location (see camera installation
instructions).