Hill Descent Control (Hdc) - GMC YUKON 2018 Owner's Manual

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 traction off light
displays in the instrument cluster.
The appropriate message will
display in the DIC. To turn TCS on
again, press and release
traction off light displayed in the
instrument cluster will turn off.
If TCS is limiting wheel spin when
is pressed, the system will not turn
off until the wheels stop spinning.
To turn off both TCS and StabiliTrak,
press and hold until the traction
off light and the StabiliTrak OFF
light come on and stay on in the
instrument cluster, then release. The
appropriate message will display in
the DIC.
To turn TCS and StabiliTrak on
again, press and release
traction off light
StabiliTrak OFF light
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.
. The See Trailer Sway Control (TSC)
0 273 or Hill Start Assist (HSA)
0 229.
Adding accessories can affect the
vehicle performance. See
Accessories and Modifications
0 278.
Hill Descent
Control (HDC)
If equipped, Hill Descent Control
(HDC) sets and maintains vehicle
speed while driving down steep
Driving and Operating
grades in a forward or reverse gear.
The HDC switch is on the center
. The
stack, below the climate controls.
and the
Press
in the
Vehicle speed must be below
50 km/h (31 mph).
When enabled, the HDC light
displays on the instrument cluster.
A blinking HDC light indicates the
system is actively applying the
brakes to maintain vehicle speed.
HDC can maintain vehicle speeds
between 1 and 30 km/h (1 and
19 mph) on grades greater than or
equal to 10%.
If HDC is to be used for more than
three minutes or on grades steeper
than 25%, the transfer case should
be put into Four-Wheel Drive Low
(4 ) to reduce the possibility of
brake overheating.
231
to enable or disable HDC.