Warning messages related to service trailer brake system GMC Sierra typically
indicate that there is an issue with your ITBC (Integrated Trailer Brake Controller),
requiring it to be fixed immediately or it could lead to severe consequences. They
also signal you should refrain from connecting a trailer until the issue has been addressed and resolved.
First and foremost, it is necessary to locate the adjustment nut on your trailer brake
system. It should usually be located near the axle at the rear of your truck.
What is the Service Trailer Brake System Warning Message?
When the “Service Trailer Brake System” warning message displays on your
dashboard, it indicates that the integrated brake controller on your vehicle is having
difficulty providing power to your trailer’s brakes. While this issue is fairly common,
it can easily be rectified with just a few simple steps.
Trailer brakes should be checked every 12,000 miles or at least annually for optimal
performance, especially if your trailer is used frequently or is driven over longer
distances. Regular servicing can ensure smooth operations.
Your truck’s trailer brake control module (ITBC) is designed to detect problems in
various components associated with its brakes, such as its controller, brakes and
wiring between them. In many instances, such problems stem from either improper
wiring connections or malfunctioning controllers and will trigger an alert in your driver information center.
What is the Cause of the Warning Message?
Service trailer brake system warning messages could appear due to wires becoming
frayed or damaged, preventing signals from reaching their proper destinations and
setting off this error message. A professional is best-suited for this job since each
connection and wire must be assessed carefully for signs of wear and tear or potential damage.
Problems could also stem from a blown fuse, as these monitor the power that runs
through your vehicle and when too much voltage passes through, they can blow.
Therefore, it’s crucial that you inspect and replace it with one of comparable size.
Repairing this kind of issue is straightforward and inexpensive, while driving safely is
of utmost importance. Ignoring error messages could result in serious accidents;
staying safety conscious at all times – whether driving or towing a trailer – could result in dire repercussions.
What is the Solution to the Warning Message?
Warning message for Service Trailer Brake System indicates a problem with either
ITBC integrated trailer brake controller module or its wiring, meaning power cannot
reach brakes and it needs to be reset in order to restore them.
To address this problem, the easiest solution is to disconnect the brake controller
from your vehicle. Doing this will stop its input into sending electricity to the brakes;
however if your brake controller is hardwired into your truck’s chassis then this may
not be an option and instead cut any output wire between your controller and trailer
brakes to solve this issue.
After cutting the wire, using a screw driver you can access and unscrew the
adjusting nut to reset your system. Twist it clockwise using penetrating oil if your
adjusting nut is rusty for easier dismantling and reset. Once complete, reattach to
its place on the truck after having reset everything back correctly.
How Do I Fix the Warning Message?
Most trailer brake systems utilize a 30-amp fuse to monitor power usage and make
sure it doesn’t exceed its capacity. But like anything electronic on your vehicle,
there’s always the risk that this fuse may blow and stop working altogether; when
this occurs, brakes won’t function at all as they won’t receive enough voltage to
function effectively. To rectify this situation, consult your owner’s manual to identify
which fuse was affected and replace it with one similar from there to get your
brakes functioning again.
Although you are technically permitted to drive with this error message displayed,
you should refrain from towing loads until the problem has been addressed. Any
minor fault could damage your trailer brake and lead to an accident; so it is best to
find an immediate resolution as soon as you see this warning message.