GM Service Manual Online
For 1990-2009 cars only

Displays Test

Certain instrument panel cluster (IPC) features are tested when the ignition is turned on in order to verify the features are working properly. The following occurs at key up:

    • The ABS indicator illuminates for 3 seconds.
    • The air bag indicator illuminates.
    • The brake indicator illuminates for 3 seconds.
    • The brake pad wear indicator illuminates for 3 seconds.
    • The brake to shift indicator illuminates.
    • The charge indicator illuminates.
    • The check engine indicator illuminates.
    • The coolant temperature indicator illuminates for 3 seconds.
    • The fasten safety belt indicator illuminates for 5 seconds and then flashes continuosly.
    • The fuel cap indicator illuminates.
    • The leveling indicator illuminates for 3 seconds.
    • The low coolant level indicator illuminates for 3 seconds.
    • The low engine oil level indicator illuminates.
    • The low fuel indicator illuminates for 3 seconds.
    • The low oil pressure indicator illuminates.
    • The low washer fluid indicator illuminates for 3 seconds.
    • The sport mode indicator illuminates for 3 seconds.
    • The traction control indicator illuminates for 3 seconds.

Indicators and Warning Messages

Refer to Indicator/Warning Message Description and Operation .

Engine Coolant Temperature Gage

The IPC displays the engine coolant temperature as determined by the engine coolant temperature gage sensor. The IPC receives a hardwire input from the engine coolant temperature gage sensor indicating the engine coolant temperature.

Engine Oil Pressure Gage

The IPC displays the engine oil pressure as determined by the engine oil pressure gage switch. The IPC receives a hardwire input from the engine oil pressure gage switch indicating the engine oil pressure.

Fuel Gage

The IPC displays the fuel level as determined by the fuel level sender. When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.

Odometers

Each instrument cluster (IPC) is equipped with a season and a trip odometer. The IPC uses the odometer rolling count message from the EBCM to determine vehicle mileage.

Season Odometer

The season odometer displays the total accumulated miles of the vehicle. This value is permanently stored in the IPC. If an odometer malfunction occurs or if the IPC must be replaced, an authorized Delphi service center must be contacted to program proper vehicle specifics (including mileage) for the IPC. The season odometer is capable of displaying 999,999 miles depending on units selected. Leading zeros are not displayed. The display will not roll-over to 000,000 if the maximum displayed miles are reached. If the display limit is exceeded, the maximum value (999,999) is displayed.

Trip Odometer

The trip odometer displays the accumulated miles to the tenths of a mile since the last reset. This value is stored in the IPC. The displayed trip odometer is reset on the IPC by pressing the trip reset button.

Speedometer

The IPC displays vehicle speed as determined by the EBCM. The IPC monitors the vehicle speed signal circuit to determine the vehicle speed.

Tachometer

The IPC monitors the engine speed signal circuit from the EBCM in order to determine engine speed.

Voltage Gage

The IPC displays the system voltage as detected at the switched battery input of the IPC.