OnStar

See also:

Tire Messages
SERVICE TIRE MONITOR SYSTEM This message displays if there is a problem with the Tire Pressure Monitor System (TPMS). See Tire Pressure Monitor Operation for more information. TIRE LEARNING ACT ...

Volume Control
VOL/ (Volume/Power): Turn clockwise or counterclockwise to increase or decrease the volume. ...

Service Vehicle Messages
SERVICE AC SYSTEM This message is displayed if there is a problem with the air conditioning system. Take the vehicle to your dealer for service. SERVICE POWER STEERING This message is displa ...