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 air bag indicator flashes 7 times. |
| • | The ABS indicator illuminates briefly. |
| • | The service engine soon indicator (MIL) illuminates briefly. |
| • | The charge indicator illuminates briefly. |
| • | The seat belt indicator illuminates for 70 seconds or until the driver seat belt is latched. |
| • | The brake indicator illuminates briefly. |
| • | All odometer segments illuminate briefly. |
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 PCM. The IPC receives a class 2 message from the PCM indicating the engine coolant temperature.
Fuel Gage
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent.
Odometers
Each instrument cluster (IPC) is equipped with a season odometer and 2 trip odometers. The IPC uses the odometer rolling count message from the PCM. The rolling count value is determined by counting the speed pulses from the vehicle speed signal (VSS). The IPC uses the rolling count data from the PCM and a software program to determine vehicle mileage. The odometers can be displayed in miles or kilometers. The units displayed is switched between english and metric by pressing the E/M button on the DIC (if equipped). When the E/M button is pressed to show the odometer in metric, km and the number will be displayed. When the odometer is in english, only the number will be displayed. During a bulb check all segments on the odometer including A, B and the word TRIP illuminate for 5 seconds.
Season Odometer
The season odometer displays the total accumulated miles or kilometers 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 Delco service center must be contacted to program proper vehicle specifics (including mileage) for the IPC. The season odometer is capable of displaying 999,999 kilometers or 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 or kilometers are reached. If the display limit is exceeded, the maximum value (999,999) is displayed. If the mileage is above 621,503 miles and metric units are selected the odometer shall display 999,999 km.
Trip Odometer
The trip odometer displays the accumulated miles or kilometers to the tenths of a mile or kilometer since the last reset. This value is stored in the IPC. The IPC has 2 trip odometers which can be selected by pressing the trip reset button. Pressing this button puts you in the trip mode A. Pressing this button again will put you in trip mode B. Pressing this button again will put you in Oil Life Left Index. Pressing this button again will put you in the season (total miles) mode assuming you started from the season mode. The displayed trip odometer is reset on the IPC by pressing and holding the trip reset button for 1.5 seconds. You have to be in the specific trip mode (A or B) in order to reset that specific trip odometer. Both trip odometers accumulate miles or kilometers even when they are not displayed. If the trip reset button is pressed and held for 3 seconds while in a trip mode (A or B), the display will reset to the number of miles (km) travelled since the start of the current ignition cycle.
Oil Life Left
Oil life left percent is based on the information it receives from a class 2 message from the PCM. The IPC displays the current percent of the GM Oil Life System in the trip odometer display. When the oil needs changing the change oil indicator in the message center turns on. When the engine oil is changed the oil life left percent needs to be reset in the trip odometer. Press and hold the trip reset button for 1.5 seconds until 100 percent is displayed in the trip odometer.
PRNDL Display
The IPC is equipped with a PRNDL display. The IPC PRNDL receives a class 2 message from the PCM indicating the PRNDL position.
Speedometer
The IPC displays vehicle speed as determined by the PCM. The IPC receives a class 2 message from the PCM. The Vehicle Speed Sensor (VSS) discrete signal is pulled up to ignition voltage in the PCM. The IPC uses the VSS data received from the PCM and a software program to determine the proper vehicle speed to display.
Tachometer
The IPC displays the engine speed as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine speed.
