GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Montana 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Diagnostic System Check - Driver Information Systems

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Perform the self-diagnostic tests on the driver information display. Go to Driver Information System Check .

The display segments light for 2 seconds, then turn off for 2 seconds.

Go to Driver Information Center (DIC) Display Inoperative

2
  1. Turn the ignition switch to the ON position.
  2. Toggle the display MODE button to temperature/compass.
    • The outside temperature is displayed.
    • The display shows a compass readout on one side of the display, when the trip functions are not displayed.

Go to Driver Information Center (DIC) Temperature Display Always Reads SC

Go to Driver Information Center (DIC) Temperature Display Always Reads OC

Go to Driver Information Center (DIC) Temperature Display Always Reads One Value

Go to Driver Information Center (DIC) Temperature Display Inaccurate

Go to Driver Information Center (DIC) Compass Inaccurate or CAL Displayed

3

Toggle the display MODE button to the trip computer functions.

The driver information display shows one of the following functions:

    • Average Fuel Economy
    • Instantaneous Fuel Economy
    • Trip Range
    • Fuel Used
    • Average Speed

Go to Driver Information Center (DIC) Always Displays Dashes

Go to Driver Information Center (DIC) Always Displays E

4
  1. Turn on the park lamps.
  2. Adjust the dimmer switch for the headlamp and instrument panel lamp assembly.
    • The display dims.
    • The driver information display brightness varies while adjusting the headlamp and instrument lamp dimmer switch.

Go to Driver Information Center (DIC) Display Does Not Dim

5
  1. Set the display to one of the following modes:
    2. • AVE ECON
    • FUEL USED
    • AVG SPEED
  2. Press the MODE button and the ENGLISH/METRIC button simultaneously for 2 seconds.
  1. The display shows all of the segments ON for less than a second.
  2. The display resets the following modes if you are in that function:
    3. • AVE ECON
    • FUEL USED
    • AVG SPEED

Go to Driver Information Center (DIC) Switch Inoperative - Reset

6

Press the ENGLISH/METRIC switch.

The display units change from English to metric.

Go to Driver Information Center (DIC) Switch Inoperative - English/Metric

7

Turn OFF the ignition switch, then turn ON the ignition switch.

The display retains the last request mode before turning off the ignition.

Go to Driver Information Center (DIC) Display Does Not Retain Last Request Mode

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.