GMC 2018 Terrain Owner's Manual page 140

Turning On and Enabling
IntelliBeam
To enable the IntelliBeam system,
press on the turn signal lever
when it is dark outside and the
exterior lamp control is in AUTO or
. The blue high-beam on light
appears on the instrument cluster
when the high beams are on.
Driving with IntelliBeam
The system only activates the high
beams when driving over 40 km/h
(25 mph).
There is a sensor near the top
center of the windshield that
automatically controls the system.
Keep this area of the windshield
clear of debris to allow for best
system performance.
The high-beam headlamps remain
on, under the automatic control,
until one of the following situations
occurs:
The system detects an
approaching vehicle's
headlamps.
The system detects a preceding
vehicle's taillamps.
The outside light is bright
enough that high-beam
headlamps are not required.
The vehicle's speed drops below
20 km/h (12 mph).
The IntelliBeam system is
disabled by the button on the
turn signal lever. If this happens,
press on the turn signal
lever when the exterior lamp
control is in the AUTO or
position to reactivate the
IntelliBeam system. The
instrument cluster light will come
on to indicate the IntelliBeam
system is reactivated.
Lighting
The IntelliBeam system will turn
off if the front fog lamps are
turned on.
The high beams may not turn off
automatically if the system cannot
detect another vehicle's lamps
because of any of the following:
The other vehicle's lamps are
missing, damaged, obstructed
from view, or otherwise
undetected.
The other vehicle's lamps are
covered with dirt, snow, and/or
road spray.
The other vehicle's lamps cannot
be detected due to dense
exhaust, smoke, fog, snow, road
spray, mist, or other airborne
obstructions.
The vehicle's windshield is dirty,
cracked, or obstructed by
something that blocks the view
of the light sensor.
The vehicle is loaded such that
the front end points upward,
causing the light sensor to aim
high and not detect headlamps
and taillamps.
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