GMC Terrain: Ride Control Systems / Hill Descent Control (HDC)
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
console.
Press
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 pressing +RES or
–SET on the steering wheel or by
applying the accelerator or brake
pedal. This adjusted speed
becomes the new set speed.
HDC will remain enabled between
22 and 60 km/h (14 and 37 mph);
however vehicle speed cannot be
set or maintained in this range.
It will automatically disable if the
vehicle speed is above 80 km/h
(50 mph) or above 60 km/h
(37 mph) for at least 30 seconds.
Press
again to re-enable HDC.
Caution
Do not repeatedly brake or
accelerate heavily when TCS is
off. The vehicle driveline could be
damaged.
At speeds of 56 km/h (35 mph) or
above, this ability to turn off or on is
disabled...
The Driver Mode Control has the
following Modes: Tour (FWD),
All-Wheel Drive (AWD), Snow/Ice,
and Tow/Haul. Turn the Driver Mode
Control knob on the center console
to make a mode selection...
Other information:
To have the Seat Entry Memory
movement begin when the
vehicle is started, select the
Settings menu, then Vehicle,
then Seating Position, and then
Seat Entry Memory. Select On or
Off. See “Seat Entry Memory”
later in this section.
Seat Exit Memory movement
begins when the ignition is
turned off and the driver door is
opened, or when the ignition is
turned off with the d..
If equipped, Adaptive Cruise Control
(ACC) allows the cruise control set
speed and following gap to be
selected. Read this entire section
before using this system. The
following gap is the following time
between your vehicle and a vehicle
detected directly ahead in your path,
moving in the same direction. If no
vehicle is detected in your path,
ACC works like regular cruise
control. ACC..