2-125How the System WorksURPA comes on automatically when the shift lever ismoved into REVERSE (R) and the vehicle speed is lessthan 3 mph (5 km/h). When the system comes on, thethree lights on the display will illuminate to let youknow that the system is working. URPA senses howclose your vehicle is to an object. The distance isdetermined by the four ultrasonic sensors located on therear bumper. When you shift into REVERSE (R) and anobject is detected, the following will occur in sequencedepending on the distance from the object: At 5 feet (1.5 m) a chime will sound and one amberlight will be lit; at 40 inches (1.0 m) both amber lights will be lit; at 20 inches (0.5 m) a continuous chime will soundand all three lights (amber/amber/red) will be lit; and at 1 foot (0.3 m) a continuous chime will sound andall three lights (amber/amber/red) will flash.URPA can detect objects 3 inches (7.6 cm) and wider,and at least 10 inches (25.4 cm) tall, but it cannot detectobjects that are above the center of the Cadillac crestbadge on the tailgate. In order for the rear sensors torecognize an object, it must be within operating range.NOTICE:The URPA system will not work correctly withthe tailgate lowered. You could damage yourvehicle by backing into an object before URPAdetects it. Turn off the URPA system whendriving with the tailgate lowered.
