Buick 2007 LaCrosse Owner's Manual page 165

The URPA display is located inside the vehicle,
above the rear window. It has three color-coded
lights that can be seen through the rearview mirror
or by turning around.
CAUTION:
{
The Ultrasonic Rear Park Assist (URPA)
system does not replace driver vision.
URPA does not:
•
Operate above speeds of
3 mph (5 km/h).
•
Detect objects more than 5 feet
(1.5 meters) behind the vehicle. This
distance may be less during warmer
or humid weather.
•
Detect objects that are below the
bumper, underneath the vehicle, or
that are very close to the vehicle.
•
Detect children, pedestrians,
bicyclists, or pets.
CAUTION: (Continued)
CAUTION: (Continued)
So if you do not use proper care before
backing up, you could hit a vehicle, child,
pedestrian, bicyclist, or pet, resulting in
vehicle damage, injury, or death. Even
though the vehicle has the URPA system,
always check carefully before backing up
by checking behind your vehicle.
How the System Works
URPA comes on automatically when the shift lever
is moved into REVERSE (R). When the system
comes on, the three lights on the display will briefly
illuminate to let you know that the system is
working. If your vehicle is moving in REVERSE (R)
at a speed greater than 3 mph (5 km/h), the red
light will flash to remind you the system does
not work at this speed.
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