GMC Terrain: Warning Lights, Gauges, and Indicators / Security Light
The security light should come on briefly as the engine is started. If it does not come on, have the vehicle serviced by your dealer. If the system is working normally, the indicator light turns off.
If the light stays on and the engine does not start, there could be a problem with the theft-deterrent system. See Immobilizer Operation.
Diesel Exhaust Fluid (DEF) Warning Light
This light, a Driver Information
Center (DIC) Message, and a chime
come on when there is an issue with
the DEF.
If the DEF issue has not been
corrected, the light will continue to
flash...
High-Beam On Light, Front Fog Lamp Light and Lamps On Reminder
High-Beam On Light
This light comes on when the
high-beam headlamps are in use.
See Headlamp High/Low-Beam
Changer.
IntelliBeam Light
This light comes on when the
IntelliBeam system, if equipped, is
enabled...
Other information:
GMC Terrain 2018-2026 Owners Manual: Power Outlet 110/120 Volt Alternating Current
If equipped, this power outlet can be used to plug in electrical equipment that uses a maximum limit of 150 watts. The power outlet is on the rear of the center console. An indicator light on the outlet turns on to show it is in use. The light comes on when the ignition is on and equipment requiring less than 150 watts is plugged into the outlet, and no system fault is detected...
GMC Terrain 2018-2026 Owners Manual: Manual Reclining Seatbacks
Warning If either seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatbacks to be sure they are locked. To recline a manual seatback: Lift the lever...
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