GM Service Manual Online
For 1990-2009 cars only

The driver information center (DIC) displays the DIC WOW for 5 seconds when it first powers up. If enabled through Personalization, the DIC returns to the last display status before no power condition.

There are 7 switch functions for the DIC.

    • Trip/Fuel Switch
    • Vehicle Information Switch
    • Personalization Switch
    • Set/Reset Switch

Trip/Fuel Information Switch

The trip/fuel button is used to navigate between fuel information and trip options. Cycle through the following trip/fuel menus by successive pressing of the trip/fuel button.

    • Average Fuel Economy (AFE)
    • Average Vehicle Speed (AVE)
    • Elapsed Time
    • Fuel Range
    • Fuel Used
    • Odometer
    • Outside Air Temperature
    • Trip Timer
    • Trip A
    • Trip B
    • Blank

Vehicle Information Switch

The driver information center (DIC) vehicle information switch is used to navigate between various vehicle information. Cycle through the following vehicle information by successive pressing of the vehicle information button.

    • Blank Display
    • Battery Voltage
    • Compass Recalibration
    • Compass Zone Setting
    • Engine Oil Life Index
    • English/Metric Units
    • Front Tire Pressure
    • Key Fob Programming Menu
    • Oil Pressure
    • Oil Temperature
    • Rear Tire Pressure
    • Tire Programming Menu

Personalization Switch

The personalization switch is used to navigate between vehicle personalization options. Cycle through the following vehicle personalization options by successive pressing of the personalization button.

    • Approach Lighting
    • Auto Lock
    • Auto Unlock
    • Chime Volume
    • Delay Lock
    • Display Language
    • Exit Lighting
    • Factory Settings
    • Feature Settings
    • Remote Lock
    • Remote Unlock
    • Remote Start

For more information on vehicle personalization features, refer to the Owner's Manual.

Set/Reset Switch

Press the set/reset button in order to set or acknowledge any switch menu options.

Average Fuel Economy

Average fuel economy is calculated using the equation: AFE = Distance/Fuel

    • Distance = The accumulated distance travelled since the last reset of this value
    • Fuel = The accumulated fuel consumption since the last reset of this value

The engine control module (ECM) sends the average fuel economy serial data message to the instrument panel cluster (IPC). The value of this mode is retained during ignition OFF and can be changed between English units and metric units by selecting from the DIC trip/fuel information switch.

Average Vehicle Speed

Average vehicle speed is calculated using the equation: Average Speed = AVS Distance/AVS Time

    • Distance = The accumulated distance travelled since the last reset of this value
    • Time = The accumulated time since the last reset of this value

Fuel Range

This message indicates the estimated distance that the vehicle can travel under the current fuel economy and fuel level conditions since the last battery connection to the IPC. Fuel Range is calculated using the equation: Fuel Range = Range Distance/Range Fuel Used.

    • Range Distance = The accumulated distance travelled since the last reset of this value.
    • Range Fuel Used = The accumulated fuel delivered since the last reset of this value

The ECM sends the fuel range value to the IPC. IPC receives a serial data message with the fuel information. The fuel range value is retained during ignition OFF and can be changed between English and Metric units by accessing the DIC trip/fuel information switch. The Fuel Range display cannot be reset. LOW is displayed when fuel range is below a predetermined value.

Fuel Used

This message indicates the amount of fuel used since last reset. Fuel Used is calculated using the equation: Fuel Used = Fuel Sum.

    • Fuel Used = The accumulated fuel used since the last reset of this value.
    • Fuel Sum = The accumulated fuel sum since the last reset of this value

The ECM sends the fuel used value to the IPC. The IPC receives a serial data message with the fuel information. The fuel used value is retained as long as battery power is available to the DIC. The fuel used value can be changed between English and Metric units by accessing the DIC trip/fuel information switch.

Elapsed Time

The timer records elapsed time starting from activation. When the DIC displays the timer, pressing the DIC SET/RESET switch for 1 second resets the timer. Pressing the SET/RESET button on the DIC switch for approximately 1 second starts and stops the timer. The DIC displays the timer in one of the following formats:

The DIC displays the timer in the following format: XX: XX:XX:

The first XX represents hours elapsed, the second XX represents minutes elapsed, and the third XX represents seconds elapsed. The maximum range of the timer is 99 hours, 59 minutes, and 59 seconds. After the maximum range is reached, the timer displays all zeros (00:00:00).

Battery Voltage

Battery voltage data is not determined by the DIC and is not a resettable parameter. The DIC displays (- - -) when an invalid battery data is received or when the IPC experiences a loss serial data communications.

Engine Oil Life Index

The Engine Oil Life Index displays the estimated percentage of oil life remaining. The engine control module (ECM) sends the oil life remaining percentage to the instrument panel cluster (IPC) via the serial data circuit. The driver information center (DIC) displays the current percentage of the GM Oil Life System as determined by the ECM. When the engine oil life remaining percentage drops below 5 percent, the DIC displays CHANGE ENGINE OIL SOON message. When the engine oil is changed, reset the GM Oil Life System. Refer to GM Oil Life System Resetting.

Tire Pressure Monitor

The instrument panel cluster (IPC) receives serial data messages from the tire pressure monitoring (TPM) system for the front and rear tire pressure. The driver information center (DIC) displays the pressure for each of the front and rear tires. Tire pressure values are not reset through the DIC.

Tire Programming Menu

The DIC displays the tire programming menu. The tire programming menu is used to initiate programming of the tire pressure monitoring sensors. The DIC displays the tire programming menu only when the vehicle is in PARK or NEUTRAL.

Compass Zone Setting

The DIC displays the compass zone information. The DIC display allows the user to change the currently selected compass zone. Refer to Compass Calibration and Magnetic Variance.

Compass Recalibration

The DIC provides the display that allows the resetting of the currently stored compass calibrations data and establish new calibration data. Refer to Compass Calibration and Magnetic Variance.

Key FOB Programming Menu

The key fob programming menu is used to initiate programming of the key fobs. The key fob programming menu can only be achieved with the vehicle transmission in PARK. Refer to Transmitter Programming for more information on compass zone setting.

English/Metric Button

The English/Metric button is used to toggle between English and Metric unit and can be accessed through the DIC trip/fuel switch.

Trip A/B

The trip odometer A or B can be accessed through the DIC trip/fuel switch.

Trip Display

DIC Trip Display

Range

Metric

English

TRIP A

####.#km

####.#MI

TRIP B

####.#km

####.#MI

Language

The driver information center (DIC) is capable of displaying in the languages listed below. However, the DIC is capable of storing at least 3 different languages at any one time.

    • English
    • French
    • Spanish

A simultaneous press of the DIC Vehicle Information and Personalization Switches for about 1 second provides a shortcut to change the language without understanding the currently displayed language. The Language settings may also be assessed through the DIC personalization switch.

Outside Air Temperature

The driver information center (DIC) displays the outside air temperature based on serial data message from the HVAC controller. The outside air temperature can be displayed in English or Metric Units. English or Metric Units can be selected from the DIC vehicle information menu. The DIC displays (-- -- --) when an invalid outside air temperature is received or communication is lost with the HVAC controller.

Oil Pressure

The driver information center (DIC) displays the engine oil pressure as determined by the ECM. The instrument panel cluster (IPC) receives a serial data message from the ECM indicating the current engine oil pressure.

Oil Temperature

The driver information center (DIC) displays the engine oil temperature as determined by the ECM. The instrument panel cluster (IPC) receives a serial data message from the ECM indicating the current engine oil temperature.

Compass

The driver information center (DIC) displays the compass based on serial data message from the BCM. The compass module communicates with the body control module (BCM) through a bi-directional data circuit. The instrument panel cluster (IPC) receives compass information from the BCM via the serial data circuit. The compass is displayed in the DIC with other vehicle information and is centered at the bottom line of the DIC. The compass display is blank when a malfunction is present with the compass module or a compass serial data communication fault exists. The compass displays 'CAL' or 'C' when the compass needs to be calibrated or the compass zone needs to be reset. Cycle the ignition before performing the compass magnetic variation adjustment procedure. The DIC vehicle information switch allows the compass zone to be reset or the compass calibrated.

Check that the compass module is properly installed in the vehicle since this may cause the compass to malfunction. The embossed arrow on the compass module should be parallel to the centerline of the vehicle.