Chevrolet 2012 Avalanche User Manual Page 329

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Black plate (79,1)
Chevrolet Avalanche Owner Manual - 2012 - crc 2nd edition - 11/7/11
Driving and Operating 9-79
To determine if the electrical fault is
on the vehicle side or trailer side of
the trailer wiring harness
connection, do the following:
1. Disconnect the trailer wiring
harness from the vehicle.
2. Turn the ignition OFF.
3. Wait 10 seconds, then turn the
ignition back to RUN.
4. If the CHECK TRAILER WIRING
message re-appears, the
electrical fault is on the
vehicle side.
If the CHECK TRAILER WIRING
message only re-appears when
connecting the trailer wiring
harness to the vehicle, the
electrical fault is on the
trailer side.
SERVICE TRAILER BRAKE
SYSTEM This message will be
displayed when there is a problem
with the ITBC system. If this
message persists over multiple
ignition cycles there is problem with
the ITBC system. Take the vehicle
to an authorized GM dealer to have
the ITBC system diagnosed and
repaired.
If either the CHECK TRAILER
WIRING or SERVICE TRAILER
BRAKE SYSTEM message is
displayed while driving the vehicle,
power is no longer available to
the trailer brakes. When traffic
conditions allow, carefully pull the
vehicle over to the side of the road
and turn the ignition off. Check the
wiring connection to the trailer and
turn the ignition back on. If either of
these messages continues, either
the vehicle or trailer needs service.
An authorized 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. Please contact
your trailer dealer for assistance
with trailer repairs and trailer
warranty information.
Trailer Sway
Control (TSC)
Vehicles with StabiliTrak have a
Trailer Sway Control (TSC) feature.
If the vehicle is towing a trailer and
the system detects that the trailer is
swaying, the vehicle brakes are
applied without the driver pressing
the brake pedal. If the vehicle is
equipped with the Integrated Trailer
Brake Control (ITBC) system,
StabiliTrak may also apply the
trailer brakes. The TCS/StabiliTrak
warning light will flash on the
instrument panel cluster to notify the
driver to reduce speed. If the trailer
continues to sway, StabiliTrak will
reduce engine torque to help slow
the vehicle. See StabiliTrak
®
System on page 944 for more
information.
Adding nondealer accessories can
affect the vehicle performance. See
Accessories and Modifications on
page 103 for more information.
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