GM Service Manual Online
For 1990-2009 cars only

The driver information center (DIC) displays PONTIAC or BUICK for 3 seconds and then the most recently used key fob when it first powers up. The DIC returns to the last display status after displaying the key fob number. The DIC can be displayed in English or French. In order to change between English/French press and hold the Mode button for more than 3 seconds.

There are 2 buttons on the DIC:

  1. Set button
  2. MODE button

Set Button

The Set button allows options to be reset in the driver information center (DIC). Options can be reset by depressing and holding the Set button for 3 seconds.

Mode Button

The display format for each mode is indicated in the following table:

Parameter

Update Range

Range

Reset Value

Units

Average Fuel Economy

2 seconds

0.0-99.9

0.0

MPG or L/100 KM

Instant Fuel Economy

1 second

0-99.9

N/A

MPG or L/100 KM

Fuel Range

8 seconds

40-999 (Low<40)

N/A

MI or KM

Fuel Used

0.1 Gal/L

0.0-999

0.0

GAL or LTR

Average Speed

2 seconds

0.0-999.9

0.0

MPH or KM/HR

Oil Life Left

2 seconds

0-100

100

%

Pressing the MODE button changes the modes of operation for the driver information center. There are ten display modes available.

    • Off -- No driver information is displayed in this mode of operation.
    • Compass/Temperature -- displays for all modes, except personalization
    • Personalization
    • Average Fuel Economy (AFE)
    • Instantaneous Fuel Economy (IFE)
    • Fuel Range
    • Fuel Used
    • Average Speed
    • Oil Life Left
    • English/Metric Display

Compass/Temperature

This mode displays an 8 point compass heading on the left hand side of the driver information center (DIC). The compass will display the current vehicle direction relative to one of 8 compass headings using N,NE,E,SE,S,SW,W, and NW for the readout. The compass display is updated once every 2 seconds. The DIC will always display the compass reading and outside temperature. On Buick vehicles with automatic HVAC (RPO CJ2) the DIC will not display temperature, the ambient temperature will only be found on the HVAC control head display.

When the compass requires calibration, C or CALIBRATE COMPASS displays. For compass calibration and compass magnetic variation adjustment refer to Electronic Compass Calibration .

Ambient Air Temperature Sensor

The ambient air temperature sensor is a 2-wire negative temperature co-efficient thermistor. A 5-volt reference and signal circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance decreases. The sensor signal varies between 0-5 volts. The IPC receives input from the ambient air temperature sensor and converts the signal to a working temperature range.

The ambient temperature range is between -40°C (-40°F) and 60°C (140°F). If the ambient temperature is below 3°C (37°F), the temperature display will toggle every 8 seconds for 2 minutes between the outside temperature and the word ICE. After 2 minutes the ICE feature is disabled. When the temperature is less than -40°C (-40°F) or when there is an open in the circuit for more than 2 seconds, OC displays. When the temperature is above 60°C (140°F) or when there is a short in the circuit for more than 2 seconds, SC displays.

The ambient air temperature sensor is mounted in the forward engine area of the vehicle. In this position, it is exposed to the airflow through the grill before it reaches the radiators.

The DIC displays the ambient air temperature value that it receives from the instrument panel cluster (IPC). The ambient air temperature is updated or displayed under the following conditions:

Conditions

Display

At start up with the engine off more than 3 hours

Displays real-time temperature

At start up with the engine off equal to or less than 3 hours

Displays last stored temperature

Vehicle speed is more than or equal to 16 km/h (10 mph)

Displays real-time temperature

Vehicle speed is less than 16 km/h (10 mph)

Displays last temperature stored while driving above 16 km/h (10 mph)

Personalization

For personalization features refer to Personalization Description and Operation in Personalization.

Average Fuel Economy (AFE)

AFE is calculated as the ratio between the following values:

    • AFE = Distance/Fuel
    • Distance = The accumulated distance since the last AFE reset
    • Fuel = The accumulated fuel consumption since the last AFE reset

You can reset the AFE mode by depressing and holding the Set button for more than 3 seconds. The value of this mode is retained during ignition OFF.

Instantaneous Fuel Economy (IFE)

Instantaneous fuel economy is calculated as the ratio between the following values:

    • IFE = Distance/Fuel
    • Distance = The accumulated distance since last update
    • Fuel = The accumulated fuel delivered since last update

You cannot reset the IFE mode. The value of this mode is not retained during ignition OFF.

Fuel Range

Fuel Range is calculated between the following values:

    • Fuel Range = AFE x Fuel Remaining
    • Fuel Remaining = Fuel sender value of available fuel

When a low fuel condition exists, the DIC displays FUEL RANGE LOW.

You can not reset the Fuel Range mode. The value of this mode is retained during ignition OFF.

Fuel Used

The DIC calculates and displays the total amount of fuel used since the last reset operation.

You can reset the Fuel Used mode by depressing and holding the Set button for more than 3 seconds. The value of this mode is retained during ignition OFF.

Average Speed

Average speed is calculated as the ratio between the following values:

    • Average Speed = Distance/Ignition On
    • Distance = Accumulated distance since last reset
    • Ignition On = Accumulated ignition on time since last reset, ignition on is defined as run power mode with engine RPM greater than 100.

Ignition On time is measured from the time that the ignition is turned ON to the time when the ignition is turned OFF.

You can reset the Average Speed mode by depressing and holding the Set button for more than 3 seconds. The value of this mode is retained during ignition OFF.

Oil Life Left

Oil life left percentage is based on the information the DIC receives from a class  2 message from the PCM. The DIC displays the current percentage of the GM Oil Life System. When the oil needs changing the change engine oil indicator in the message center turns ON. When the engine oil is changed, reset the oil life left. Refer to GM Oil Life System Resetting in Maintenance and Lubrication.

Low Tire Pressure

Tire pressure is based on the information the DIC receives from a class 2 message from the EBCM. The DIC displays NORMAL when the tire pressure is normal. When there is low tire pressure, the DIC displays LOW TIRE PRESSURE HOLD SET TO RESET. In order to reset the low tire pressure, press and hold the Set button for 3 seconds. When the tire pressure has been reset, the DIC displays TIRE PRESSURE RESET for 3 seconds.

English/Metric Display

While in this mode pressing the Set button changes the units in the DIC and HUD from English to Metric and vice versa.