GMC 2012 Sierra Denali Owner's Manual page 323

A. Manual Trailer Brake Apply
Lever
B. Trailer Gain Adjustment Buttons
The ITBC system has a control
panel located on the instrument
panel to the left of the steering
column. See
. The control panel allows
adjustment to the amount of output,
referred to as trailer gain, available
to the electric trailer brakes and
allows manual application of the
trailer brakes.
The Trailer Brake Control Panel is
used along with the Trailer Brake
Display Page on the DIC to adjust
and display power output to the
trailer brakes.
The ITBC system displays
messages on the vehicle s Driver
Information Center (DIC). See
for more information.
The display page indicates Trailer
Gain setting, power output to the
electric trailer brakes, trailer
connection, and system operational
status.
The Trailer Brake Display Page can
be displayed by performing any of
the following actions:
Scrolling through the DIC menu
pages using the odometer trip
stem or the DIC Vehicle
Information button (if equipped).
Pressing a Trailer Gain button; if
the Trailer Brake Display Page is
not currently displayed, pressing
a Trailer Gain button will first
recall the current Trailer Gain
setting. After the Trailer Brake
Display Page is displayed, each
press and release of the gain
buttons will then cause the
Trailer Gain setting to change.
Activating the Manual Trailer
Brake Apply lever.
Connecting a trailer equipped
with electric trailer brakes.
All DIC warning and service
messages must first be
acknowledged by the driver by
pressing the odometer trip stem or
the DIC Vehicle Information button
(if equipped) before the Trailer
Brake Display Page can be
displayed and Trailer Gain can
be adjusted.
TRAILER GAIN: This setting is
displayed any time the Trailer Brake
Display Page is active. This setting
can be adjusted from 0.0 to 10.0
with either a trailer connected or
disconnected.