GMC Terrain: Initial Drive Information / Interior Lighting

Steering Wheel Adjustment

To adjust the steering wheel: Pull the lever down. Move the steering wheel up or down. Pull or push the steering wheel closer or away from you...

Dome Lamps

The dome lamp controls are in the overhead console. To operate, press the following buttons: : Press to turn off the dome lamps when a door is open...

Other information:

GMC Terrain 2018-2026 Owners Manual: Engine Heater

Warning Do not plug in the engine block heater while the vehicle is parked in a garage or under a carport. Property damage or personal injury may result. Always park the vehicle in a clear open area away from buildings or structures. The engine heater, if available, can help in cold weather conditions at or below −18 °C (0 °F) for easier starting and better fuel economy during engine..

GMC Terrain 2018-2026 Owners Manual: Lumbar Adjustment and Reclining Seatbacks

Lumbar Adjustment If equipped, press and hold the front or rear of the control to increase or decrease lumbar support. Reclining Seatbacks Warning Sitting in a reclined position when the vehicle is in motion can be dangerous. Even when buckled up, the seat belts cannot do their job. The shoulder belt will not be against your body. Instead, it will be in front of you. In a crash, you coul..