GMC Sierra 2011 Owner's Manual page 395

Integrated Trailer Brake
Control System
The vehicle may have an Integrated
Trailer Brake Control (ITBC) system
for electric trailer brakes.
This symbol is located on the Trailer
Brake Control Panel on vehicles
with an Integrated Trailer Brake
Control system. The power output to
the trailer brakes is based on the
amount of brake pressure being
applied by the vehicle s brake
system. 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 s brake, antilock brake,
and StabiliTrak (if equipped)
systems. In trailering conditions that
cause the vehicle s antilock brake or
StabiliTrak 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.
2500 and 3500 series vehicles with
StabiliTrak have a Trailer Sway
Control (TSC) feature. See Trailer
Sway Control (TSC) on page 9 119.
2500 and 3500 series vehicles with
StabiliTrak have a Hill Start Assist
(HSA) feature. See Hill Start Assist
(HSA) on page 9 67.
I n f o r ma t i o n P r o v i d e d b y :
Driving and Operating
If the vehicle s brake, antilock brake,
or StabiliTrak systems are not
functioning properly, the ITBC
system may not be fully functional
or may not function at all. Make sure
all of these systems are fully
operational to ensure full
functionality of the ITBC system.
The ITBC system is powered
through the vehicle's electrical
system. Turning the ignition off will
also turn off the ITBC system. The
ITBC system is fully functional only
when the ignition is in ON or
in RUN.
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