Cadillac 2008 STS, Owner'S Manual, Page: 118 / 500

How the System Works
URPA comes on automatically when the shift lever
is moved into REVERSE (R). The rear display will
then briefly illuminate to let you know the system
is working.
URPA operates only at speeds less than 3 mph (5 km/h).
If you are above this speed, the red light on the rear
display will flash.
To be detected, objects must be at least 10 inches
(25.4 cm) off the ground and below trunk level.
Objects must also be within 5 feet (1.5 m) from your
rear bumper. This distance may be less during warmer
or humid weather.
A single beep will sound the first time an object is
detected between 20 inches (0.5 m) and 5 feet (1.5 m)
away. Repeated beeping will occur when you are
closer than 20 inches (0.5 m) from the object.
The following describes what will occur with the URPA
display as you get closer to a detected object:
Description English Metric
amber light 5 ft 1.5 m
amber/amber lights 40 in 1.0 m
amber/amber/red
lights/continuous beep
20 in 0.5 m
amber/amber/red lights
flashing and
continuous beep
1 ft 0.3 m
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