2004 Buick Park Avenue Owner's Manual - Page 139

How the System Works CAUTION: (Continued) 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 comes on automatically when the shift lever is moved into REVERSE (R). When the system comes on, the three lights on the display will briefly illuminate to let you know that the system is working. If your vehicle is moving in REVERSE (R) at a speed greater than 3 mph (5 km/h), the red light will flash to remind you the system does not work at this speed. The first time an object is detected while in REVERSE (R), a chime will sound and the following will occur in sequence, depending on the distance from the object: • At 5 feet (1.5 m) a chime will sound and one amber light 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 sound and all three lights (amber/amber/red) will be lit. • At 1 foot (0.3 m) a continuous chime will sound and all 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 detect objects that are above trunk level. In order for the rear sensors to recognize an object, it must be within operating range. 3-21