GMC Terrain 2025 - Page 205

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18552429) - 2025
204 Driving and Operating
How the System Works
T
h
e LCA symbol lights up in the side mirrors
when the system detects amoving vehicle in
the next lane over that is in the side blind zone
or rapidly approaching that zone from behind.
Alit LCA symbol indicates it may be unsafe
to change lanes. Before making alane change,
check the LCA display, check mirrors, glance
over your shoulder, and use the turn signals.
Left Side Mirror
Di
splay
Right Side Mirror
Di
splay
When the vehicle is started, both outside mirror
LCA displays will briefly come on to indicate
the system is operating. When the vehicle is
in aforward gear, the left or right side mirror
display will light up if amoving vehicle is
detected in the next lane over in that blind
zone or rapidly approaching that zone. If the
turn signal is activated in the same direction as
adetected vehicle, this display will flash as an
extra warning not to change lanes.
LCA can be disabled through vehicle
pe
rsonalization. To view available settings
from the infotainment screen, touch Settings
>Vehicle >Collision/Detection Systems. If LCA
is disabled by the driver, the LCA mirror displays
will not light up.
When the System Does Not Seem to
Work Properly
The LCA system requires some driving for the
system to calibrate to maximum performance.
This calibration may occur more quickly if
the vehicle is driven on astraight highway
road with traffic and roadside objects (e.g.,
guardrails, barriers). During atrip, the LCA
system is not operational until the vehicle first
reaches aspeed of 24 km/h (15 mph).
LCA displays may not come on when passing
avehicle quickly or for astopped vehicle. LCA
may alert to objects attached to the vehicle,
such as abicycle, or object extending out to
either side of the vehicle. Attached objects may
also interfere with the detection of vehicles.
This is normal system operation; the vehicle
does not need service.
LCA may not always alert the driver to vehicles
in the next lane over, especially in wet
conditions or when driving on sharp curves.
The system does not need to be serviced. The
sy
stem may light up due to guardrails, signs,
trees, shrubs, and other non-moving objects.
This is normal system operation; the vehicle
does not need service.
LCA may not operate when the LCA sensors in
the left or right corners of the rear bumper are
covered with mud, dirt, snow, ice, or slush, or
in heavy rainstorms. For cleaning instructions,
see "Washing the Vehicle" under Exterior Care
3278. If the Driver Information Center (DIC)
still displays the system unavailable message
after cleaning both sides of the vehicle toward
the rear corners of the vehicle, see your dealer.
If the LCA displays do not light up when moving
vehicles are in the side blind zone or rapidly
approaching this zone and the system is clean,
the system may need service. Take the vehicle
to your dealer.
Driving with aTrailer
If equipped with Lane Change Alert (LCA), the
LCA detection zones that extend back from the
side of the vehicle do not move further back
when atrailer is towed.
Use caution while changing lanes when towing
atrailer.