GM Service Manual Online
For 1990-2009 cars only

System Overview

The Instrument Panel Cluster (IPC) is divided into 4 types. The types generally define the hardware style of the IPC, such as the number/shape of the multi-function displays (MFD) and trim.

Each type has therefore been additionally categorised in terms of the software functionality supported by the IPC. There are two levels of functionality distinguished as Low and High series.

A Police variant of IPC is also provided which is based on the low series, but which incorporates additional functionality for use in a policing situation. Some of the High series functionality are also removed in the Police model.

Low series vehicles only contain 1 MFD, where as High series vehicles contain 3 MFDs located on the IPC.

Low and High series vehicles will generally contain the same features except the functionality will differ for the following features;

    • Trip Computer Operation and Display
    • Customisation (Options Menu)

The instrument panel information displays provide visual information to the driver for a number of vehicle functions such as trip computer, audio, warnings and reminders.

When the ignition is switched on, a vehicle system check is performed and the status is shown on the display.

Certain IPC features will be tested in order to verify the features are working correctly. The following occurs at key ON.

    • The air bag indicator flashes.
    • The Anti-lock Brake System (ABS) indicator illuminates briefly.
    • The battery indicator illuminates briefly.
    • The brake indicator illuminates briefly.
    • The malfunction indicator lamp (MIL) illuminates briefly (not IPC controlled).
    • The seat belt indicator will stay illuminated until the driver seat belt is latched (not IPC controlled).

If there are no warnings or service reminders, the display shows a series of welcome screens. If the system check detects a problem, it displays the appropriate warning immediately. If a warning is displayed, press the TRIP button to acknowledge it (once for each warning). It then reverts to the original trip computer display.

    •  Pressing the TRIP button any time during the system check causes the display to jump ahead to the last trip computer screen displayed before the ignition was last switched off. The system check continues to run in the background.
    • To display the odometer screen, if not already displayed, press the TRIP button until the screen appears.
    • The transmission selector position indication is only displayed if the vehicle is fitted with automatic transmission

When the ignition is in the OFF position, the odometer appears on the display, unless a service reminder is active. Active service reminders will be displayed for 10 seconds before reverting back to the odometer.