GMC Terrain: Lighting Features / Entry/Exit lighting
Entry Lighting
Some exterior lamps and interior
lamps turn on briefly at night, or in
areas with limited lighting, when 
is pressed on the Remote Keyless
Entry (RKE) transmitter. When a
door is opened, the interior lamps
come on. They stay on for about
20 seconds. When all of the doors
have been closed or the ignition is
turned on, they gradually fade out.
This feature can be changed. See “Vehicle Locator Lights” under Vehicle Personalization.
Exit Lighting
Some exterior lamps and interior lamps come on at night, or in areas with limited lighting, when the driver door is opened after the ignition is turned off. The dome lamp comes on after the ignition is turned off. The exterior lamps and dome lamp remain on for a set amount of time, then automatically turn off.
The exterior lamps turn off immediately by turning the exterior lamp control off. This feature can be changed. See Vehicle Personalization 0 152.
Battery Load Management, Battery Power Protection and Exterior
Lighting Battery Saver
Battery Load Management
The vehicle has Electric Power
Management (EPM) that estimates
the battery's temperature and state
of charge. It then adjusts the voltage
for best performance and extended
life of the battery...
Other information:
GMC Terrain 2018-2025 Owners Manual: Replacing Airbag System Parts after a Crash
Warning A crash can damage the airbag systems in the vehicle. A damaged airbag system may not properly protect you and your passenger(s) in a crash, resulting in serious injury or even death. To help make sure the airbag systems are working properly after a crash, have them inspected and any necessary replacements made as soon as possible...
GMC Terrain 2018-2025 Owners Manual: 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. When is pressed on the power door lock switch with the door open, a chime will sound three times indicating that delayed locking is active...