trailer CHEVROLET SILVERADO EV 2024 Repair Manual

Chevrolet Silverado EV Owner Manual (GMNA-Localizing-U.S./Canada-
16702912) - 2024 - CRC - 1/17/23
Driving and Operating 305
Trailer Lamps
Always check that all trailer lamps are
working at the beginning of each trip, and
periodically on longer trips.
If equipped, the Trailering App will monitor
the right-hand turn/brake lamp circuit,
left-hand turn/brake lamp circuit, running
lamp circuit, and reverse lamp circuits on
the trailer. DIC messages and Trailering App
alerts may be displayed if lighting circuit
issues are detected on the trailer.
If a trailer cannot be detected, the
trailer-related DIC messages and/or
Trailering App alerts will not display.
Pressing START LIGHT TEST in the Trailering
App automatically activates trailer lamps.
The Trailering App is not a substitute for
manually inspecting your trailer lamps. See
Trailering App0310.
Trailer Connection and Lamp Messages
When a trailer is properly connected and
working, no trailer connection or lamp
messages appear on the Driver Information
Center (DIC). However, if the vehicle detects
an issue with a trailer connection or lamp,
you may see the following DIC message(s):
.TRAILER DISCONNECTED CHECK
CONNECTION appears when a connected
trailer is disconnected. It appears
immediately when the vehicle is on,
or upon the next start-up if the trailer
was disconnected while the vehicle was
off. Check the trailer connection as
appropriate.
.CHECK TRAILER XXX LAMP appears when
there is a detected lamp or wiring fault
on the trailer. Check the trailer wiring and
lamps.
Turn Signals When Towing a Trailer
When properly connected, the trailer turn
signals will illuminate to indicate the vehicle
is turning, changing lanes, or stopping.
When towing a trailer, the arrows on the
instrument cluster will illuminate even if the
trailer is not properly connected or the bulbs
are burned out.
Tow/Haul Mode
For instructions on how to enter Tow/Haul
mode, see Driver Mode Control 0209.
Tow/Haul mode assists when pulling a
heavy trailer or a large or heavy load. Tow/Haul mode is designed to be most
effective when the vehicle and trailer
combined weight is at least 75% of the
vehicle's Gross Combined Weight Rating
(GCWR). See
“Maximum Trailer Weight”
under Trailer Towing 0297.
Tow/Haul mode is most useful when towing
a heavy trailer or carrying a large or
heavy load:
.through rolling terrain
.in stop-and-go traffic
.in busy parking lots
Integrated Trailer Brake Control System
The vehicle may have an Integrated Trailer
Brake Control (ITBC) system for use with
electric trailer brakes or most electric over
hydraulic trailer brake systems. These
instructions apply to both types of electric
trailer brakes.

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This symbol is on the Trailer Brake Control
Panel on vehicles with an ITBC system. The
power output to the trailer brakes is
proportional to the amount of vehicle
braking. This available power output to the
trailer brakes can be adjusted to a wide
range of trailering situations.
The ITBC system is integrated with the
vehicle brakes, Antilock Brake System (ABS),
and StabiliTrak/Electronic Stability Control
(ESC) systems. In trailering conditions that
cause the vehicle’s anti-lock brake or
StabiliTrak/ESC systems to activate, power
sent to the trailer's brakes will be
automatically adjusted to minimize trailer
wheel lock-up. This does not imply that the
trailer has StabiliTrak/ESC.
If the vehicle brakes, ABS, or StabiliTrak/ESC
systems are not functioning properly, the
ITBC system may not function fully or at all.
Make sure all of these systems are fully
operational to allow the ITBC system to
function properly.
The ITBC system is powered through the
vehicle's electrical system. Turning the
vehicle off will also turn off the ITBC
system. The ITBC system is fully functional
only when the vehicle is in ON/RUN.{Warning
Connecting a trailer that has an air brake
system may result in reduced or
complete loss of trailer braking, including
increased stopping distance or trailer
instability which could result in serious
injury, death, or property damage. Only
use the ITBC system with electric or
electric over hydraulic trailer brake
systems.
Trailer Brake Control Panel
1. Manual trailer brake apply lever
2. Trailer symbol
3. Trailer gain adjustment buttons
The trailer symbol on the control panel will
light amber when a trailer with electric
brakes is connected.
The ITBC panel is on the instrument panel.
See Instrument Panel Overview 04. The
control panel allows adjustment to the
amount of output, referred to as Trailer
Gain, available to the trailer brakes and
allows manual application of the trailer
brakes. Use the ITBC panel and the trailer
brake DIC display page to adjust and display
power output to the trailer brakes.
Trailer Brake DIC Display Page
The ITBC display page shows:
.Trailer Gain setting
.Output to the trailer brakes
.Trailer connection
.System operational status
To view the Trailer Brake DIC page, do one
of the following::
.Scroll through the DIC menu pages
.Press a Trailer Gain (+) or (−) button
.Activate the Manual Trailer Brake Apply
Lever

Chevrolet Silverado EV Owner Manual (GMNA-Localizing-U.S./Canada-
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Driving and Operating 307
TRAILER GAIN:
Press a Trailer Gain button to recall the
current Trailer Gain setting. Each press and
release of the gain buttons will change the
Trailer Gain setting. Press the Trailer
Gain (+) or (−) to adjust. Press and hold to
continuously adjust the Trailer Gain. To turn
the output to the trailer off, adjust the
Trailer Gain setting to 0.0. This setting can
be adjusted from 0.0 to 10.0 with a trailer
connected or disconnected.
TRAILER OUTPUT: This displays anytime a
trailer with electric brakes is connected.
Output to the trailer brakes is based on the
amount of vehicle braking present and
relative to the Trailer Gain setting. Output is
displayed from 0–100% for each gain
setting.
The Trailer Output will indicate“- - - - - -”on
the Trailer Brake Display Page whenever the
following occur:
.No trailer is connected
.A trailer without electric brakes is
connected, no DIC message will display
.A trailer with electric brakes has become
disconnected, a CHECK TRAILER WIRING
message displays on the DIC
.There is a fault present in the wiring to
the trailer brakes, a CHECK TRAILER
WIRING message displays on the DIC
.The ITBC system is not working due to a
fault, a SERVICE TRAILER BRAKE SYSTEM
message displays in the DIC
Manual Trailer Brake Apply Lever
Slide this lever right to apply the trailer’s
electric brakes independent of the vehicle’s
brakes. Use this lever to adjust Trailer Gain
to achieve the proper power output to the
trailer brakes. This lever may also be used
to request additional trailer braking at any
time. The trailer and vehicle brake lamps
will come on when either vehicle brakes or
manual trailer brakes are applied and
properly connected.
Trailer Gain Adjustment Procedure
Trailer Gain should be set for a specific
trailering condition and it must be
readjusted anytime vehicle loading, trailer
loading, or road surface conditions change.
{Warning
Trailer brakes that are over-gained or
under-gained may not stop the vehicle
and the trailer as intended and can result (Continued)
Warning (Continued)
in a crash. Always follow the instructions
to set the Trailer Gain for the proper
trailer stopping performance.
To adjust Trailer Gain for each towing
condition: 1. Drive the vehicle with the trailer attached on a level road surface
representative of the towing condition
and free of traffic at about 32–40 km/h
(20–25 mph) and fully apply the Manual
Trailer Brake apply lever. Adjusting
Trailer Gain at speeds lower than
32–40 km/h (20–25 mph) may result in
an incorrect gain setting.
2. Adjust the Trailer Gain, using the Trailer Gain adjustment buttons, to just below
the point of trailer wheel lockup,
indicated by trailer wheel squeal or tire
smoke when a trailer wheel locks. Trailer
wheel lockup may not occur if towing a
heavily loaded trailer. In this case, adjust
the Trailer Gain to the highest allowable
setting for the towing condition.

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308 Driving and Operating
3. Readjust Trailer Gain any time vehicleloading, trailer loading, or road surface
conditions change or if trailer wheel
lockup is noticed at any time while
towing.
Other ITBC-Related DIC Messages
TRAILER BRAKES CONNECTED: This message
will briefly display when a trailer with
electric brakes is first connected to the
vehicle. This message will automatically turn
off in about 10 seconds. This message can
be acknowledged before it automatically
turns off.
CHECK TRAILER WIRING: This message will
display if:
.The ITBC system first determines
connection to a trailer with electric brakes
and then the trailer harness becomes
disconnected from the vehicle.
‐ If the disconnect occurs while the
vehicle is stationary, this message will
automatically turn off in about
30 seconds. This message will also turn
off if it is acknowledged or if the trailer
harness is reconnected.
‐ If the disconnect occurs while the
vehicle is moving, this message will
continue until the vehicle is turned off. This message will also turn off if it is
acknowledged or if the trailer harness
is reconnected.
.There is an electrical fault in the wiring to
the trailer brakes. This message will
continue as long as there is an electrical
fault in the trailer wiring. This message
will also turn off if it is acknowledged.
To determine whether the electrical fault is
on the vehicle side or trailer side of the
trailer wiring harness connection: 1. Disconnect the trailer wiring harness from the vehicle.
2. Turn the vehicle off.
3. Wait 10 seconds, then turn the vehicle back to RUN.
4. If the CHECK TRAILER WIRING message reappears, the electrical fault is on the
vehicle side.
If the CHECK TRAILER WIRING message
only reappears when connecting the
trailer wiring harness to the vehicle, the
electrical fault is on the trailer side.
SERVICE TRAILER BRAKES OR REDUCED
TRAILER BRAKING: This message will display
if the electric trailer brake performance is
either reduced or non-functional. HOLD LAST KNOWN GAIN: This message will
display if it is no longer possible to adjust
the trailer brake gain. Trailer brakes may or
may not still be functional, and it is not
possible to adjust brake gain based on road
conditions. The trailer brakes may remain
functional until the next time the vehicle is
turned off.
TRAILER BRAKES DISABLED SERVICE
REQUIRED: This message will display when
there is a problem with the ITBC system.
If this message continues over multiple
restarts, have the vehicle serviced.
If the CHECK TRAILER WIRING, TRAILER
BRAKES DISABLED SERVICE REQUIRED,
SERVICE TRAILER BRAKE SYSTEM, or REDUCED
TRAILER BRAKING message displays while
driving, the ITBC system may not be fully
functional or may not function at all. When
traffic conditions allow, carefully pull the
vehicle over to the side of the road and turn
the vehicle off. Check the wiring connection
to the trailer and turn the vehicle back on.
If either of these messages continue, either
the vehicle or trailer needs service.

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{Warning
Driving while the trailer braking system is
malfunctioning may increase loading on
the vehicle's braking system or lead to
trailer instability. Use caution. Drive
slowly and allow for increased stopping
distances.
A GM dealer may be able to diagnose and
repair problems with the trailer. However,
any diagnosis and repair of the trailer is not
covered under the vehicle warranty. Contact
your trailer dealer for assistance with trailer
repairs and trailer warranty information.
Trailer Sway Control (TSC)
Vehicles with StabiliTrak/Electronic Stability
Control (ESC) have a Trailer Sway Control
(TSC) feature. Trailer sway is unintended
side-to-side motion of a trailer while towing.
If the vehicle is towing a trailer and the TSC
detects that sway is increasing, the vehicle
brakes are selectively applied at each wheel,
to help reduce excessive trailer sway.
If equipped with the Integrated Trailer Brake
Control (ITBC) system, and the trailer has an
electric brake system, StabiliTrak may also
apply the trailer brakes.
If TSC is enabled, the Traction Control
System (TCS)/StabiliTrak warning light will
flash on the instrument cluster. Reduce
vehicle speed by gradually removing your
foot from the accelerator. If trailer sway
continues, StabiliTrak can help slow the
vehicle down. TSC will not function if
StabiliTrak is turned off. See Traction
Control/Electronic Stability Control 0207.
{Warning
Trailer sway can result in a crash and in
serious injury or death, even if the
vehicle is equipped with TSC.
(Continued)
Warning (Continued)
If the trailer begins to sway, reduce
vehicle speed by gradually removing your
foot from the accelerator. Then pull over
to check the trailer and vehicle to help
correct possible causes, including an
improperly or overloaded trailer,
unrestrained cargo, improper trailer hitch
configuration, or improperly inflated or
incorrect vehicle or trailer tires. See
Towing Equipment0301 for trailer
ratings and hitch setup recommendations.
Aftermarket Electronic Trailer Sway
Control Devices
Some trailers may come equipped with an
electronic device designed to reduce or
control trailer sway. Aftermarket equipment
manufacturers also offer similar devices that
connect to the wiring between the trailer
and the vehicle. These devices may interfere
with the vehicle’s trailer brake systems or
other systems, including integrated
anti-sway systems, if equipped. Messages
related to trailer connections or trailer
brakes could appear on the DIC. The effects

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310 Driving and Operating
of these aftermarket devices on vehicle
handling or trailer brake performance is not
known.
{Warning
Use of aftermarket electronic trailer sway
control devices could result in reduced
trailer brake performance, loss of trailer
brakes, or other malfunctions, and result
in a crash. You or others could be
seriously injured or killed. Before using
one of these devices:
.Ask the device or trailer manufacturer
if the device has been thoroughly
tested for compatibility with the
make, model, and year of your vehicle
and any optional equipment installed
on your vehicle.
.Before driving, check the trailer brakes
are working properly, if equipped.
Drive the vehicle with the trailer
attached on a level road surface that
is free of traffic at about 32-40 km/h
(20-25 mph) and fully apply the
manual trailer brake apply lever. Also,
check the trailer brake lamps and
other lamps are functioning correctly.(Continued)
Warning (Continued)
.If the trailer brakes are not operating
properly at any time, or if a DIC
message indicates problems with the
trailer connections or trailer brakes,
carefully pull the vehicle over to the
side of the road when traffic
conditions allow.
Trailer Tires
Special Trailer (ST) tires differ from vehicle
tires. Trailer tires are designed with stiff
sidewalls to help prevent sway and to
support heavy loads. These features can
make it difficult to determine if the trailer
tire pressures are low only based on a visual
inspection.
Always check all trailer tire pressures before
each trip when the tires are cool. Low trailer
tire pressure is a leading cause of trailer tire
blow-outs.
If the vehicle is equipped with a trailer tire
pressure monitoring system, see the trailer
tire pressure monitoring system description
and the trailering app. Trailer tires deteriorate over time. The trailer
tire sidewall will show the week and year
the tire was manufactured. Many trailer tire
manufacturers recommend replacing tires
more than six years old.
Overloading is another leading cause of
trailer tire blow-outs. Never load your trailer
with more weight than the tires are
designed to support. The load rating is
located on the trailer tire sidewall.
Always know the maximum speed rating for
the trailer tires before driving. This may be
significantly lower than the vehicle tire
speed rating. The speed rating may be on
the trailer tire sidewall. If the speed rating is
not shown, the default trailer tire speed
rating is 105 km/h (65 mph).
Trailering App
Trailer Light App
If equipped, the Trailering App is on the
infotainment home screen.

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Status View
The Status view shows:
.Lights
.Checklists
.Brakes (If equipped)
Each section shows high-level status
information for the feature. Selecting a
section opens up a new screen with
additional information and/or options.
Light Test
Select “Start” to cycle the trailer lamps on
and off to determine if they are working.
The test follows this sequence:
1. The running lights turn on first and remain on throughout the sequence.
2. The brake lights turn on for about two seconds. 3. The left turn signal light flashes three
times.
4. The right turn signal light flashes three times.
5. The reverse lights turn on for about two seconds.
6. Steps 2–5 repeat for about one minute and 45 seconds, or until the test
deactivates.
Select Stop to stop the test.
The sequence also deactivates when any of
the following occur:.The vehicle is turned off.
.The electric drive unit is shifted out of
P (Park).
.The brake pedal is pressed.
.The turn signal is activated
.The hazard warning lights are activated.
Checklist
This view shows the recommended steps to
take before towing a trailer.
Touch the box next to each item if that step
has been completed.
Touch > to access a detailed view of
each step. Within each detailed view, touch Next and
Previous to navigate between steps.
Touch Clear All to clear the completed
statuses from all items in the current
checklist.
Brakes
If equipped with Integrated Trailer Brake
Controller (ITBC) system and if the
connected trailer is equipped with electric
brakes or electric over hydraulic brakes, this
view displays the current state of the brakes
including brake gain setting and output.
If no electric brakes are detected or if no
trailer is connected, this view displays the
last known brake gain setting and the
output shows dashed lines.
Touch Add to Driver Display to show trailer
brake gain and output in the Driver
Information Center (DIC).
Touch How To Set Brake Gain to view
detailed steps to set trailer brake gain.
The Trailering App System shows any brake
issues reported by the trailer brake
controller in the Brakes view. Trailer
diagnosis and service may be required.
Repair your trailer brakes if needed. A trailer
braking issue is not covered by your GM
warranty.

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312 Driving and Operating
See“Integrated Trailer Brake Control
System” section under Towing Equipment
0 301.
Trailering App
If equipped, the Trailering App is on the
Home Page of the infotainment home
screen.
If equipped, this feature allows profiles for
connected trailers to be created to view
status, to store and track trailer usage
information, and to set up towing assist
features.
The Trailering App welcome page appears
when the Trailering App is opened for the
first time from the infotainment home
screen.
When a trailer is electrically connected and
a trailer profile has not been created, there
is an option to create a profile, use a guest
profile, or select Accessory/No trailer.
When a trailer is electrically connected after
a Trailer Profile has been created, the trailer
detection pop-up appears with a list of all of
the custom Trailer Profiles made on the
vehicle. To load an existing Trailer Profile,
select one of the Trailer Profiles listed,
or load the Guest Trailer Profile by selecting GUEST TRAILER. Touching Accessory/No
trailer selects Accessory/No trailer as the
active Trailer Profile and dismisses the
pop-up.
Create a Trailer Profile
1. Touch Add Trailer on the trailer detection pop-up or touch + Add Trailer in the
Trailering App.
2. Follow the on-screen instructions to set up a profile.
3. After a profile is created, set up for additional trailer features may become
available, such as Tow/Haul mode
reminder, Trailer Tire Pressure
Monitoring System, maintenance
reminders, or camera views and guides.
Import a Trailer Profile 1. Touch Import on the trailer detection pop-up or touch Import in the
Trailering App.
2. Follow the on-screen instructions to import a profile.
3. After a profile is imported, it can be selected from the trailer list. The Tow/
Haul mode reminder, Brake Gain Setting
and Trailer Tire Pressure sensor learning,
if equipped, do not import.
Trailer Feature Setup
Tow/Haul Mode Reminder
To turn the Tow/Haul Mode Reminder
setting on, touch Yes. To turn it off,
touch No.
Trailer Tire Monitoring
If the TTPMS is detected, touch the Trailer
Tire Monitoring icon to set up trailer tire
monitoring.
1. Select trailer tire speed rating.
2. Enter trailer tire manufacturing date number.
3. Follow the on-screen instructions to complete the trailer tire sensor learn
process.
The trailer tire pressure sensors can transmit
up to 7 m (23 feet) from the hitch receiver of
the vehicle.
A trailer must be electrically connected to
the vehicle before starting the
sensor-to-vehicle learn process.
After selecting Start from the Learn Sensors
screen, use the Tool Method or the Manual
Method (described below) to learn each
TTPMS sensor, during which the current tire
number will be highlighted. The vehicle has

Chevrolet Silverado EV Owner Manual (GMNA-Localizing-U.S./Canada-
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Driving and Operating 313
a maximum of two minutes to detect and
label each TTPMS sensor. After each sensor
is learned, a check mark appears next to the
tire, the vehicle horn sounds, the vehicle
brake lamps flash, and all working trailer
lamps flash.
The recommended tire pressure must be
entered for the trailer tires. An alert appears
when a trailer tire's pressure is high or low.
Tool Method: A TTPMS activation tool can
be purchased separately to learn the trailer
TTPMS sensor locations.
Manual Method: Without the TTPMS
activation tool, the air pressure can be
increased or decreased in each tire for
10 seconds. Do not exceed the maximum
inflation pressure found on the tire
sidewalls. Make sure to readjust tire
pressure to the recommended level when
the process is complete.
Sensor Learning Steps
To complete the sensor-to-vehicle learn
process:1. Touch Start on the Learn Sensors screen. The horn chirps twice and the Learning
Active screen appears on the
infotainment display. 2. Start with the driver side front
trailer tire.
3. Activate the tool near the valve stem or adjust the air pressure of this tire until
the horn chirps and all working vehicle
and trailer lights flash.
The process stops without saving the
sensor locations if this step takes more
than two minutes.
4. Move to the next tire and repeat Step 3 for each sensor. The horn chirps twice
when all sensors are completed.
5. Return to the vehicle to complete the setup.
Maintenance Reminders
To set up maintenance reminders, touch the
Trailer Maintenance icon. Follow the
on-screen prompts. The maximum number
of reminders is 50.
Camera Views and Guides
To set up the trailer camera and guideline
features, if equipped, touch the Camera
Views and Guides icon.
1. Select the number of axles on the trailer.
2. Select the wheel location on the trailer (inboard or outboard). 3. Enter the trailer dimensions as prompted.
Follow the on-screen instructions to
complete setup for available features.
Certain trailer features require a compatible
trailer profile be configured and selected.
A compatible trailer is a box-type trailer
(cargo, camper, etc.) with a conventional
hitch.
Transparent Trailer Setup
If equipped, the rear trailer camera must be
mounted on the trailer and electrically
connected to the vehicle before transparent
trailer feature can be used. See Assistance
Systems for Parking or Backing 0246.
Follow the on-screen instructions to enter
the trailer dimensions.
Trailer dimensions must be in range and
transparent trailer must be calibrated
before use.
.Trailer Length: Measure from center of
coupler to furthest rear point on the
trailer.
.Trailer Total Width: Measure from the left
most edge of trailer, including the wheels,
to the right most edge.

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.Trailer Body Width: Measure from the left
edge to the right edge of the trailer
body. This is only applicable to trailers
with outboard tires.
.Trailer Height: Measure from ground to
tallest point of the trailer.
.Hitching Point Length: Measure from
center of coupler to middle of tires.
.Trailer Tongue Length: Measure from the
center of the coupler to the trailer front
wall, if the trailer has a flat front. If it
does not have a flat front, measure from
the center of the coupler to the corner of
the sidewall. The point where the taper
meets the full width of the trailer.
.Vehicle Hitch Height: Measure from
ground to top of coupler.
.Vehicle Hitch Length: Measure from hitch
receiver to center of ball.
If trailer dimensions are out of range, this
feature is unavailable. Ensure the rear trailer
camera is connected.
Follow on-screen instructions to drive
forward to complete calibration.
Rear Trailer Guidance Setup
If equipped, a rear trailer camera must be
mounted on the trailer and electrically
connected to the vehicle before the rear trailer guidance feature can be used. See
Assistance Systems for Parking or Backing
0
246.
Trailer dimensions must be in the following
range to enable this feature:
.Trailer Length: Measure from center of
coupler to furthest rear point on the
trailer.
If trailer dimensions are out of range, this
feature is unavailable. Ensure rear trailer
camera is connected.
Follow the on-screen instructions to drive
forward to complete calibration.
Jack-Knife Alert Setup
If equipped, follow the on-screen instructions
to drive forward to complete calibration.
Trailer Length Indicator Setup
Follow on-screen instructions to drive
forward to complete calibration.
Trailer Side Blind Zone Alert Setup
Follow the on-screen instructions to enter
the trailer dimensions.
Trailer dimensions must be in range to
enable this feature.
.Trailer Length: Measure from center of
coupler to furthest rear point on the
trailer.
.Trailer Width: Measure from the left edge
to right edge of the trailer body.
If trailer dimensions are out of range, this
feature is unavailable.
Status View
If a trailer is connected, the Status view
shows status information for the active
trailer profile.
If no trailer is connected, the Status view
shows the last trailer profile with a status of
Not Connected.
The Status view shows:
.Tires (if equipped)
.Lights
.Cameras (if equipped)