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 GMC Terrain. Hill Descent Control (HDC) to enable or disable HDC. Vehicle speed must be below 50 km/h (31 mph).

GMC Terrain. Hill Descent Control (HDC)

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 GMC Terrain. Hill Descent Control (HDC) again to re-enable HDC.

    (TCS) / (ESC). Turning the Systems Off and On (Base Level DIC)

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    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 2018-2024 Owners Manual: Manual Operation


    Select OFF to manually operate the liftgate. Caution Attempting to move the liftgate too quickly and with excessive force may result in damage to the vehicle. Operate the liftgate manually with a smooth motion and moderate speed. The system includes a feature which limits the manual closing speed to protect the components...

    GMC Terrain 2018-2024 Owners Manual: Brake Assist and Hill Start Assist (HSA)


    Brake Assist The Brake Assist feature is designed to assist the driver in stopping or decreasing vehicle speed in emergency driving conditions. This feature uses the stability system hydraulic brake control module to supplement the power brake system under conditions where the driver has quickly and forcefully applied the brake pedal in an attempt to quickly stop or slow down the vehicl..

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