The driver information center (DIC) displays important vehicle information and is used to warn the driver of certain critical vehicle conditions. The DIC is also used to display Odometer, engine oil life and language selection. The trip odometer reset switch serves as an interface to reset the trip odometer, reset engine oil life, acknowledge warning messages, select language preference and recall the season odometer when the ignition is OFF. The instrument panel cluster (IPC) receives class 2 serial data messages from the body control module (BCM) or the PCM/ECM commanding the display of a particular message. Once the IPC displays a message, it sends a class 2 message to the BCM to activate the associated chime if necessary.

The trip odometer switch serves as a multipurpose switch to perform the following functions:

While in the odometer display mode, each trip odometer switch press for less than 2 seconds cycles through all available information options. Pressing the switch for greater than 2 seconds resets the trip odometer to zero.

Odometer

The odometer information is stored in the body control module (BCM) and is transmitted to the instrument panel cluster (IPC) for display in the driver information center (DIC). The IPC stores a backup copy of the odometer value in case the IPC does not receive a valid odometer reading form the BCM. The last known good odometer value from the BCM is displayed by the IPC before ERROR is displayed in the DIC. When a non critical vehicle information is displayed in the DIC and the trip odometer switch is pressed , the DIC displays the season odometer information. When the ignition is in OFF or ACC position, pressing the trip odometer switch prompts the display of the odometer and trip odometer.

Oil Life Reset

The powertrain control module (PCM)/engine control module (ECM) sends the oil life remaining percentage to the body control module (BCM) via a serial data message. The IPC receives a serial data message from the BCM indicating the remaining oil life. The DIC displays the current percentage of the GM Oil Life System as determined by the PCM/ECM. When the oil life remaining percentage drops below 10 percent, the DIC displays CHANGE ENGINE OIL. When the engine oil is changed, reset the engine oil life in order to clear the oil life remaining percentage display. The DIC displays OIL LIFE until the trip reset switch is pressed for greater than 2 seconds. The oil life monitor resets after the switch press and the DIC displays RESET until the trip reset switch is pressed again.

Language (Export Canada)

The DIC displays in either English or French. The DIC displays the language that is currently being used. Once the language transition function is activated by pressing the trip reset switch, the DIC displays the new language

COMPASS

The mirror uses two magnetic field sensors for compass direction. One sensor is for north and south, the other is for east and west. The mirror supplies a signal and low reference to each sensor. As the vehicle travels with or against the earth's magnetic pull, there will be a change in voltage on one or both sensors. As a result of the change in voltage, the mirror changes the heading on the compass display.

TEMPERATURE DISPLAY

The inside rearview mirror monitors the ambient air temperature sensor. As the outside air temperature gets warmer, the ambient air temperature sensor will lower resistance. The inside rearview mirror monitors this change and will show this as a warmer temperature on the display. Temperatures exceeding 62°C (143°F) will be out of the mirror's temperature range and SC will be shown on the temperature display. In colder outside air temperatures, the ambient air temperature sensor will raise in resistance. The inside rearview mirror will show a colder temperature on the display. Temperatures lower than -40°C (-40°F) will be out of the mirror's temperature range and OC will be shown on the temperature display. In cold temperatures such as 3°C (37°F) or below, the temperature display will show ICE when the ignition is first turned on. The display will toggle between ICE and the actual outside temperature until the temperature update process is complete.

The inside rearview mirror has two switches that perform the following functions:

The inside rearview mirror has four switches. The on/off switch located at the left side of the mirror performs the following functions:

The three switches on the right side of the mirror are for OnStar® operation. For more information, refer to OnStar Description and Operation .