Buick 2004 Rendezvous Owner's Manual page 165

CAUTION:
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Even with the Ultrasonic Rear Park Assist
system, the driver must check carefully before
backing up. The system does not operate above
typical backing speeds of 3 mph (5 km/h) while
parking. And, the system does not detect
objects that are more than 5 feet (1.5 meters)
behind the vehicle.
So, unless you check carefully behind you
before and when you back up, you could strike
children, pedestrians, bicyclists or pets behind
you, and they could be injured or killed.
Whether or not you are using Rear Park Assist,
always check carefully behind your vehicle
before you back up and then watch closely as
you do.
URPA can be turned off by
pressing the rear park aid
disable switch located
in the instrument panel
switchbank. When
the system is disabled, an
indicator light will glow
on the switch. You will not
see any lights on the
rear display if the switch is
in the off position.
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