Cleaning The System - GMC 2014 Sierra Owner's Manual

If the FCA system does not seem to
operate properly, cleaning the
outside of the windshield in front of
the camera sensor and the front of
the vehicle may correct the issue.
LDW may help avoid crashes due to
unintentional lane departures. It may
provide a warning if the vehicle is
crossing a detected lane marking
without using a turn signal. LDW
uses a camera sensor to detect the
lane markings. It only operates at
speeds of 56 km/h (35 mph) or
greater.
When the vehicle crosses a
detected lane marking, the LDW
indicator will flash and either three
beeps will be sounded from the left
or right side, or three Safety Alert
Seat pulses will occur on the left or
right side of the seat, depending on
the lane departure direction. LDW
will not warn if the turn signal is on
or if a sharp maneuver is made.
The LDW system is an aid to help
the vehicle stay in the driving
lane. It does not steer the vehicle.
The LDW system may not:
Provide enough time to avoid
a crash.
Detect lane markings under
bad weather conditions or if
the windshield is dirty.
Detect lane markings and will
not detect road edges.
Warn that the vehicle is
crossing a lane marking if the
system does not detect the
lane marking.
If LDW only detects lane
markings on one side of the road,
it will only warn you when
departing the lane on the side
where it has detected a lane
marker. Even with LDW, always
keep your attention on the road
and maintain proper vehicle
position within the lane, or vehicle
damage, injury, or death could
occur. Always keep the
windshield clean and do not use
LDW in bad weather conditions.
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