GMC Hummer EV 2023 Owner's Manual page 264

GMC Hummer EV Owner Manual (GMNA-Localizing-MidEast-16569278) -
2023 - CRC - 1/25/23
264 Driving and Operating
The ITBC system is integrated with the
vehicle s brake, 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 s brake, 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
(Continued)
Warning (Continued)
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 control panel is on the instrument
panel to the right of the steering column.
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 control panel and the
DIC trailer brake display page to adjust and
display power output to the trailer brakes.
Trailer Brake DIC Display Page
The ITBC display page indicates:
Trailer Gain setting
Output to the trailer brakes
Trailer connection
System operational status
To display:
Scroll through the DIC menu pages
Press a Trailer Gain (+) or ( ) button
Activate the Manual Trailer Brake Apply
Lever
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