
Black plate (51,1)
GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 2/11/15
Driving and Operating
9-51
press and release the
g
button. The
traction off light
i
displayed in the
instrument cluster will turn off.
If TCS is limiting wheel spin when
the
g
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
g
button until
the traction off light
i
and the
StabiliTrak OFF light
g
come on
and stay on in the instrument
cluster, then release. The
appropriate message will display in
the DIC. See
Ride Control System
Messages on page 5-36
.
To turn TCS and StabiliTrak on
again, press and release the
g
button. The traction off light
i
and
the StabiliTrak OFF light
g
in the
instrument cluster turn off.
StabiliTrak will automatically turn on
if the vehicle exceeds 56 km/h
(35 mph). Traction control will
remain off.
The vehicle has a Trailer Sway
Control (TSC) feature and a Hill
Start Assist (HSA) feature. See
Trailer Sway Control (TSC) on
page 9-87
or
Hill Start Assist (HSA)
on page 9-48
.
Adding accessories can affect the
vehicle performance. See
Accessories and Modifications on
page 10-3
.
Hill Descent
Control (HDC)
If equipped, HDC can be used when
driving downhill. It sets and
maintains vehicle speed while
descending a very steep incline in a
forward or reverse gear.
The HDC switch is on the center
stack, below the climate controls.
Press
5
to enable or disable HDC.
Vehicle speed must be below
50 km/h (31 mph).
The HDC light displays on the
instrument cluster when enabled.
HDC can maintain vehicle speeds
between 3 and 22 km/h (2 and
14 mph) on an incline greater than
or equal to a 10% grade. A blinking
HDC light indicates the system is
actively applying the brakes to
maintain vehicle speed.
When HDC is activated, the initial
HDC speed is set to the current
driving speed. It can be increased or
decreased by applying the
accelerator or brake pedal. This
adjusted speed becomes the new
set speed.