GMC Terrain: Driving and Operating / Conversions and Add-Ons

Add-On Electrical Equipment

Warning

The Data Link Connector (DLC) is used for vehicle service and Emission Inspection/Maintenance testing. See Malfunction Indicator Lamp (Check Engine Light). A device connected to the DLC — such as an aftermarket fleet or driver-behavior tracking device — may interfere with vehicle systems. This could affect vehicle operation and cause a crash. Such devices may also access information stored in the vehicle’s systems.

Caution

Some electrical equipment can damage the vehicle or cause components to not work and would not be covered by the vehicle warranty. Always check with your dealer before adding electrical equipment.

Add-on equipment can drain the vehicle's 12-volt battery, even if the vehicle is not operating.

The vehicle has an airbag system. Before attempting to add anything electrical to the vehicle, see Servicing the Airbag-Equipped Vehicle and Adding Equipment to the Airbag-Equipped Vehicle.

 

    Towing Equipment

    Hitches Always use the correct hitch equipment for your vehicle. Crosswinds, large trucks going by, and rough roads can affect the trailer and the hitch...

    Vehicle Care

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    Other information:

    GMC Terrain 2018-2021 Owners Manual: Remote Vehicle Start


    If equipped, the engine can be started from outside of the vehicle. Starting the Vehicle Press and release on the RKE transmitter. Immediately press and hold for at least four seconds or until the turn signal lamps flash. When the vehicle starts, the parking lamps will turn on. Remote start can be extended. Start the vehicle normally after entering. Canceling a Remote Start To cance..

    GMC Terrain 2018-2021 Owners Manual: Resuming a Set Speed


    If the ACC is set at a desired speed and then the brakes are applied, ACC is disengaged without erasing the set speed from memory. To begin using ACC again, press RES+ briefly while moving more than 5 km/h (3 mph). The vehicle returns to the previous set speed. A green ACC indicator and the set speed display on the instrument cluster. The vehicle ahead indicator may be flashing if a vehic..

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