GMC Sierra Limited 1500 2019 Owner's Manual page 285

284 Driving and Operating
Warning (Continued)
Under many conditions, these
systems will not:
Detect children,
pedestrians, bicyclists,
or animals.
Detect vehicles or objects
outside the area monitored
by the system.
Work at all driving speeds.
Warn you or provide you
with enough time to avoid a
crash.
Work under poor visibility or
bad weather conditions.
Work if the detection sensor
is not cleaned or is covered
by ice, snow, mud, or dirt.
Work if the detection sensor
is covered up, such as with
a sticker, magnet, or metal
plate.
(Continued)
Warning (Continued)
Work if the area surrounding
the detection sensor is
damaged or not properly
repaired.
Complete attention is always
required while driving, and you
should be ready to take action
and apply the brakes and/or steer
the vehicle to avoid crashes.
Audible or Safety Alert Seat
Some driver assistance features
alert the driver of obstacles by
beeping. To change the volume of
the warning chime, see Comfort
and Convenience under Vehicle
Personalization 0 163.
If equipped with the Safety Alert
Seat, the driver seat cushion may
provide a vibrating pulse alert
instead of beeping. To change this,
see Collision/Detection Systems
under Vehicle Personalization
0 163.
Cleaning
Depending on vehicle options, keep
these areas of the vehicle clean to
ensure the best driver assistance
feature performance. Driver
Information Center (DIC) messages
may display when the systems are
unavailable or blocked.