GMC 2010 Sierra 1500 Crew Cab Owner's Manual page 296

This message displays when there is a problem with
the theft-deterrent system. The vehicle may or may
not restart so you may want to take the vehicle to
your dealer before turning off the engine. See
for more information.
If your vehicle has the Tire Pressure Monitor System
(TPMS), this message displays if a part on the system
is not working properly. The tire pressure light also
flashes and then remains on during the same ignition
cycle. See
conditions may cause this message to appear. See
information. If the warning comes on and stays on,
there may be a problem with the TPMS. See your
dealer.
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If your vehicle has StabiliTrak, this message displays
when there is a problem with the Traction Control
System (TCS). When this message displays, the
system will not limit wheel spin. Adjust your driving
accordingly. See your dealer for service. See
information.
On vehicles with the Integrated Trailer Brake Control
(ITBC) system, this message displays and a chime may
sound when there is a problem with the ITBC system.
. Several
When this message displays, power is no longer
available to the trailer brakes.
for more
As soon as it is safe to do so, carefully pull your 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 this message still displays, either
your vehicle or the trailer needs service. See your
dealer.
See Integrated Trailer Brake Control System under
for more
for more information.