When the System Does Not Seem to Work Properly

The following messages may be displayed on the DIC:

SERVICE PARKING 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. This can occur under the following conditions:

○ The driver has disabled 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 Exterior Care on page 10‑83.
○ The park assist sensors are covered by frost or ice. Frost or ice can form around and behind the sensors and may not always be seen; this can occur after washing the vehicle in cold weather. The message may not clear until the frost or ice has melted.
○ A trailer was attached to the vehicle, or an object was hanging out of the liftgate during the last drive cycle. Once the object is removed, URPA will return to normal operation. . A tow bar is attached to the vehicle.
○ The bumper is damaged. Take the vehicle to your dealer to repair the system.
○ Other conditions, such as vibrations from a jackhammer or the compression of air brakes on a very large truck, are affecting system performance.

    See also:

    Vehicle Load Limits
    It is very important to know how much weight your vehicle can carry. This weight is called the vehicle capacity weight and includes the weight of all occupants, cargo, and all nonfactory-installed opt ...

    Storing and Deleting Phone Numbers
    The system can store up to 30 phone numbers as name tags in the Hands&-Free Directory that is shared between the Bluetooth and OnStar systems. The following commands are used to delete and stor ...

    Cellular and GPS Antennas
    Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...