GMC Terrain: Keys and Locks / Power Door Locks

Driver Door Key Lock Cylinder Access (In Case of Dead Battery)

To access the driver door key lock cylinder: Pull the door handle (1) to the open position and hold it open until cap removal is complete. Insert the key into the slot (3) on the bottom of the cap (2) and lift the key upward...

Delayed Locking

This feature delays the actual locking of the doors until five seconds after all doors are closed. Delayed locking can only be turned on when the Open Door Anti-Lockout feature has been turned off...

Other information:

GMC Terrain 2018-2024 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 2018-2024 Owners Manual: Safety Locks

The rear door safety locks prevent passengers from opening the rear doors from inside the vehicle. Manual Safety Locks If equipped, the safety lock is on the inside edge of the rear doors. To use the safety lock: Move the lever down to the lock position. Close the door. Do the same for the other rear door. To open a rear door when the safety lock is on: Unlock the door by activati..