GMC Terrain 2025 - Daytime Running Lamps (DRL); Automatic Headlamp System

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18552429) - 2025
112 Lighting
To flash the high beams, pull the turn signal
l
e
ver toward you momentarily and then
release it.
Daytime Running Lamps (DRL)
DRL can make it easier for others to see the front
of your vehicle during the day.
Fully functional DRL are required on all vehicles
first sold in Canada.
The DRL come on when all of the following
conditions are met:
•
The vehicle is on.
•
The exterior lamp control is in AUTO.
•
The light sensor determines it is daytime.
The taillamps, instrument panel lights, and
other lamps will not turn on when this feature
is activated.
The DRL turn off when the headlamps are
turned to O or the vehicle is off.
For vehicles first sold in Canada, the DRL can
only be turned off when the vehicle is parked.
Automatic Headlamp System
Wh
en the exterior lamp control is set to AUTO
and it is dark enough outside, the headlamps
come on automatically.
There is a light sensor on top of the instrument
panel. Do not cover the sensor; otherwise
the headlamps will come on when they are
not needed.
The system may also turn on the headlamps
when driving through aparking garage
or tunnel.
If the vehicle is started in adark garage,
the automatic headlamp system comes on
immediately. If it is light outside when the
vehicle leaves the garage, there is aslight
delay before the automatic headlamp system
ch
anges to the Daytime Running Lamps (DRL).
During that delay, the instrument cluster
may not be as bright as usual. Make sure
the instrument panel brightness control is in
the full bright position. See Instrument Panel
Illumination Control 3114.
When it is bright enough outside, the
headlamps will turn off or may change to DRL.
The automatic headlamp system turns off
when the exterior lamp control is turned to O
or the ignition is off.
Lights On with Wipers
If the windshield wipers are activated in
daylight with the engine on, and the exterior
lamp control is in AUTO, the headlamps,
parking lamps, and other exterior lamps come
on. The transition time for the lamps coming
on varies based on wiper speed. When the
wipers are not operating, these lamps turn off.
Move the exterior lamp control to O or ; to
disable this feature.