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.
(TCS) / (ESC). Turning the Systems Off and On (Base Level DIC)
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...
Driver Mode Control
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:
GMC Terrain 2018-2023 Owners Manual: Power Outlets and Universal Remote System
Power Outlets The vehicle has two 12-volt accessory power outlets, which can be used to plug in electrical equipment, such as a cell phone or MP3 player. There are power outlets: On the center stack below the climate control system. In the rear cargo area...
GMC Terrain 2018-2023 Owners Manual: Engine Exhaust
Engine Exhaust Warning Engine exhaust contains carbon monoxide (CO), which cannot be seen or smelled. Exposure to CO can cause unconsciousness and even death. Exhaust may enter the vehicle if: The vehicle idles in areas with poor ventilation (parking garages, tunnels, deep snow that may block underbody airflow or tail pipes)...
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Tire Pressure Light
For vehicles with the Tire Pressure Monitor System (TPMS), this light comes on briefly when the engine is started. It provides information about tire pressures and the TPMS.
