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 2018-2025 Owners Manual: New Vehicle Break-In
Caution The vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines: Do not drive at any one constant speed, fast or slow, for the first 800 km (500 mi). Do not make full-throttle starts...
GMC Terrain 2018-2025 Owners Manual: Seat Adjustment - Manual Front Seats
To adjust a manual seat: Pull the handle at the front of the seat. Slide the seat to the desired position and release the handle. Try to move the seat back and forth to be sure it is locked in place. Seat Height Adjuster Move the lever up or down to manually raise or lower the seat...
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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.
