GMC Sierra 2015 Owner's Manual page 318

Turn on and stay on when either
system is not working.
If either system fails to turn on or to
activate, a message displays in the
Driver Information Center (DIC),
and comes on and stays on to
indicate that the system is inactive
and is not assisting the driver in
maintaining control. The vehicle is
safe to drive, but driving should be
adjusted accordingly.
If comes on and stays on:
1. Stop the vehicle.
2. Turn the engine off and wait
15 seconds.
3. Start the engine.
Drive the vehicle. If comes on
and stays on, the vehicle may need
more time to diagnose the problem.
If the condition persists, see your
dealer.
Turning the Systems Off
and On
The button for TCS and StabiliTrak
is on the center stack.
Caution
Do not repeatedly brake or
accelerate heavily when TCS is
off. The vehicle driveline could be
damaged.
To turn off only TCS, press and
release the button. The traction
off light displays in the instrument
cluster. The appropriate message
will display in the DIC. See Ride
Control System Messages on
page 5-40. To turn TCS on again,
Driving and Operating
press and release the
traction off light displayed in the
instrument cluster will turn off.
If TCS is limiting wheel spin when
the button is pressed, the system
will not turn off until the wheels stop
spinning.
To turn off both TCS and StabiliTrak,
press and hold the
the traction off light
StabiliTrak OFF light
and stay on in the instrument
cluster, then release. The
appropriate message will display in
the DIC. See Ride Control System
Messages on page 5-40.
To turn TCS and StabiliTrak on
again, press and release the
button. The traction off light
the StabiliTrak OFF light
instrument cluster turn off.
9-51
button. The
button until
and the
come on
and
in the