2011 Buick Lucern Owner's Manual - Page 140

The system can be disabled through the Driver Information Center (DIC). See "Park Assist" under DIC Operation and Displays on page 4 ‑ 42 for more information. . . A tow bar is attached to the vehicle. The vehicle's bumper is damaged. Take the vehicle to your dealer to repair the system. Other conditions may affect system performance, such as vibrations from a jackhammer or the compression of air brakes on a very large truck. . When the System Does Not Seem to Work Properly SERVICE PARK ASSIST: If this message occurs, take the vehicle to your dealer to repair the system. PARK ASSIST OFF: If the URPA system does not activate due to a temporary condition, the message displays on the DIC, see DIC Operation and Displays on page 4 ‑ 42 for more information. This can occur under the following conditions: . . If the system is still disabled, after driving forward at least 40 km/h (25 mph), take the vehicle to your dealer. Side Blind Zone Alert (SBZA) The vehicle may have a Side Blind Zone Alert (SBZA) system. Read this entire section before using the system. The driver disables the system. The ultrasonic sensors are not clean. Keep the vehicle's rear bumper free of mud, dirt, snow, ice and slush. For cleaning instructions, see Washing Your Vehicle on page 6‑102. A trailer was attached to the vehicle, or a bicycle or an object was hanging out of the trunk during the last drive cycle. Once the object is removed, URPA will return to normal operation. { WARNING: SBZA is only a lane changing aid and does not replace driver vision. SBZA does not detect: . . Vehicles outside the side blind zones which may be rapidly approaching. Pedestrians, bicyclists, or animals. (Continued) . 3-36