2009 Buick LaCrosse Owner's Manual - Page 112

The display is located above the rear window and can be seen by looking over your right shoulder. 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 the 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 the vehicle gets closer to a detected object: Description amber light amber/amber lights amber/amber/red lights/continuous beep amber/amber/red lights flashing and continuous beep English 5 ft 40 in 20 in 1 ft Metric 1.5 m 1.0 m 0.5 m 0.3 m URPA uses three color-coded lights to provide distance and system information. How the System Works URPA comes on automatically when the shift lever is moved into R (Reverse). 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 the vehicle is above this speed, the red light on the rear display will flash. 2-38