Cadillac 2011 DTS Owner's Manual page 139

For vehicles with the Ultrasonic Front and Rear Parking
Assist (UFRPA) system, it operates at speeds less than
8 km/h (5mph), and assists the driver with parking and
avoiding objects. It can determine how close objects are
to the front bumper, up to 1.2 m (4 ft.) in front of the
vehicle and the rear bumper, up to 2.5 m (8 ft.) behind
the vehicle. The distance sensors are located on the
front and rear bumper.
The Ultrasonic Front and Rear Parking Assist
(UFRPA) system does not replace driver vision.
It cannot detect:
Objects that are below the bumper,
underneath the vehicle, or if they are too close
or far from the vehicle.
Children, pedestrians, bicyclists, or pets.
If you do not use proper care before moving
forward and while backing; vehicle damage, injury,
or death could occur. Even with UFRPA, always
check in front of the vehicle before moving
forward and behind the vehicle before backing up.
While moving forward and backing, be sure to
look for objects and check the vehicle mirrors.
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