GMC 2014 Sierra Owner's Manual page 318

1. View Displayed by the Camera
2. Corners of the Rear Bumper
Displayed images may be farther or
closer than they appear. The area
displayed is limited and objects that
are close to either corner of the
bumper or under the bumper do not
display.
A warning triangle may display on
the RVC screen to show where the
Ultrasonic Rear Parking Assist
(URPA) has detected an object. This
triangle changes from amber to red
and increases in size the closer the
object.
With URPA, as the vehicle backs up
at speeds of less than 8 km/h
(5 mph), the system detects objects
up to 2.5 m (8 ft) behind the vehicle
that are within a zone 25 cm (10 in)
high off the ground and below
bumper level.
The parking assist system does
not detect children, pedestrians,
bicyclists, animals, or objects
located below the bumper or that
are too close or too far from the
vehicle. It is not available at
speeds greater than 8 km/h
(5 mph). To prevent injury, death,
or vehicle damage, even with
parking assist, always check the
area around the vehicle and
check all mirrors before moving
forward or backing.
The instrument cluster parking
assist display has bars that show
distance to object and object
location information for URPA, and
on some vehicles, for the Front
Parking Assist system. As the object
gets closer, more bars light up.
When an object is first detected in
the rear, one beep will be heard
from the rear, or both sides of the
Safety Alert Seat will pulse two
times. When an object is very close
(<0.6 m (2 ft) in the vehicle rear,
or <0.3 m (1 ft) in the vehicle front),
a continuous beep will sound from
the front or rear, or both sides of the