For 1990-2009 cars

### Driver Information Display Description and Operation

The driver information display processes various input signals and displays the relative information on the driver information display screen.

### Vehicles equipped with UT3 Audio System

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

### Vehicles equipped with UWP Audio System

The driver information display, displays a digital voltage gauge and a digital oil pressure gauge on the display screen.

#### Voltage Gauge Display

The driver information display processes input signals and displays the current vehicle's electrical system voltage value in the form of a bar graph on the driver information display screen. Under normal operating conditions, the voltage gauge should display between 13.8 - 15.4 volts.

#### Oil Pressure Gauge Display

The driver information display processes input signals and displays the current vehicle's engine oil pressure value in the form of a bar graph on the driver information display screen. Under normal operating conditions, the oil pressure gauge should display a minimum oil pressure of 74 kPa/10 psi at idle speed and a maximum oil pressure of 377 kPa/54 psi at 2,000 RPM.