See also:

Playing an MP3/WMA Disc
CD players with the MP3 feature are capable of playing an MP3/WMA CD-R or CD-RW disc. See MP3 for more information. ...

PARKING ASSIST BLOCKED SEE OWNER'S MANUAL
If the vehicle has the Ultrasonic Rear Park Assist (URPA) system, this message displays if there is something interfering with the park assist system. See Ultrasonic Parking Assist for mor ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...