GM Service Manual Online
For 1990-2009 cars only

Odometer

The odometer displays the total accumulated miles/Km of the vehicle. This value is permanently stored in the EEPROM of 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.

Trip Odometer

The trip odometer displays the accumulated mileage/Km to the tenths of a mile/Km since the last reset. This value is stored in KAM of the IPC. The IPC has two trip odometers and slectable by pressing the TRIP A/B button. The trip odometer(s) may be reset on the IPC by pressing the TRIP RESET button when the trip information is being displayed in the DIC. If a button is not used to reset the trip odometer, the display will roll-over automatically as follows. The trip odometer will roll-over at 999.9 miles when operated in English mode and at 999.9 Km in metric mode. When the trip odometer is displaying greater than 621.4 miles (operating in English mode) and the English/metric button is pressed, the trip odometer will reset to zero and display Km values. If the English/metric button is pushed again, the cluster will convert the displayed Km value into miles.