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: Brake Fluid
The brake master cylinder reservoir is filled with GM approved DOT 3 brake fluid as indicated on the reservoir cap. See Engine Compartment Overview for the location of the reservoir. Checking Brake Fluid With the vehicle in P (Park) on a level surface, the brake fluid level should be between the minimum and maximum marks on the brake fluid reservoir...
GMC Terrain 2018-2025 Owners Manual: Alerting the Driver
If ACC is engaged, driver action may be required when ACC cannot apply sufficient braking because of approaching a vehicle too rapidly. When this condition occurs, six red lights will flash on the windshield. Either eight beeps will sound from the front, or both sides of the Safety Alert Seat will pulse five times...