Vehicles Equipped With UT3 Audio System

The secondary driver information display provides several on-screen menus, which may be used to select preferences or to make adjustments. Under normal operating conditions the secondary driver information display will display:

• A digital clock displaying the time.
• The current radio station frequency selected.
• Whether or not a CD is inserted in the audio system.

The following audio system messages may be displayed on the secondary driver information display screen:

• Security Lockout Active: This message is displayed when the coded security system has been activated.
• ERR: This message is displayed when the audio system is unable to play the inserted cassette or CD.
• LOC: This message is displayed when the audio system has entered theft mode.
• CAL/CAL ERR: This message is displayed when the audio system has detected an invalid calibration.
• CHECK CD: This message is displayed when the audio system encounters a tracking error.
• NO DISC: This message is displayed when there is no CD discs inserted in the audio system.
• NONE: This message is displayed when the audio system cannot detect the vehicle speed data from GMLAN.

Perform the appropriate diagnostic procedures when an error message is displayed.