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
..
Other information:
GMC Terrain 2018-2025 Owners Manual: Vehicle Alarm System
This vehicle has an anti-theft alarm system. The indicator light, on the instrument panel near the windshield, indicates the status of the system: Off : Alarm system is disarmed. On Solid : Vehicle is secured during the delay to arm the system. Fast Flash : Vehicle is unsecured. A door, the hood, or the liftgate is open. Slow Flash : Alarm system is armed. Arming the Alarm System Turn o..
GMC Terrain 2018-2025 Owners Manual: Engine Power Messages and Vehicle Speed Messages
Engine Power Messages ENGINE POWER IS REDUCED This message displays when the vehicle's propulsion power is reduced. Reduced propulsion power can affect the vehicle's ability to accelerate. If this message is on, but there is no observed reduction in performance, proceed to your destination. The performance may be reduced the next time the vehicle is driven. The vehicle may be driven while..
