GMC Sierra Denali 1500 2023 Owner's Manual page 297

296 Driving and Operating
Warning
Using LKA on slippery roads could cause
loss of control of the vehicle and a crash.
Turn the system off.
Warning
LKA will not alert the driver if a towed
trailer crosses into an adjacent lane of
travel. Serious injury or property damage
may occur if the trailer moves into
another lane. Always monitor the trailer
position while towing to make sure it is
within the same lane as the tow vehicle.
How the System Works
LKA uses a camera sensor installed on the
windshield ahead of the rearview mirror to
detect lane markings. It may provide brief
steering assist if it detects an unintended
lane departure. It may further provide an
audible alert or the driver seat may pulse
indicating that a lane marking has been
crossed. The system does not provide a Lane
Departure Warning (LDW) when
intentionally steering across a lane marker.
To turn LKA on and off, press
center stack. If equipped, the indicator light
on the button comes on when LKA is on and
turns off when LKA is disabled. In some
vehicles a long press of over three seconds
is required to turn LKA off.
A
When on, is white, if equipped,
indicating that the system is not ready to
A
assist. is green if LKA is ready to
assist. LKA may assist by gently turning the
steering wheel if the vehicle approaches a
A
detected lane marking.
assisting. It may also provide a Lane
Departure Warning (LDW) alert by flashing
A
amber if the vehicle crosses a
detected lane marking. Additionally, there
may be three beeps, or the driver seat may
pulse three times, on the right or left,
depending on the lane departure direction.
Take Steering
The LKA system does not continuously steer
the vehicle. If LKA does not detect active
driver steering, an alert and chime may be
provided. Steer the vehicle to dismiss. LKA
may become temporarily unavailable after
repeated take steering alerts.
A When the System Does Not Seem to
on the
Work Properly
The system performance may be
affected by:
Close vehicles ahead.
Sudden lighting changes, such as when
driving through tunnels.
Banked roads.
Roads with poor lane markings, such as
two-lane roads.
If the LKA system is not functioning
is amber when
properly when lane markings are clearly
visible, cleaning the windshield may help.
A camera blocked message may display if
the camera is blocked. Some driver
assistance systems may have reduced
performance or not work at all. An LKA or
LDW unavailable message may display if the
systems are temporarily unavailable. This
message could be due to a blocked camera.
The LKA system does not need service. Clean
the outside of the windshield behind the
rearview mirror.
LKA assistance and/or LDW alerts may occur
due to tar marks, shadows, cracks in the
road, temporary or construction lane
markings, or other road imperfections. This