GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Description

The driver information center (DIC) displays important vehicle information including compass and ambient air temperature. Power is provided to the DIC via the IP Fuse Block. The DIC communicates with the instrument panel cluster (IPC) via the serial data circuit.

Reference Information

Schematic Reference

    •  Instrument Cluster Schematics
    •  Driver Information System Schematics

Connector End View Reference

    •  Displays and Gages Connector End Views
    •  Inline Harness Connector End Views

Description and Operation

Driver Information Center (DIC) Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the DIC.
  2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal F and ground.
  3. If greater than the specified value, test the ground reference circuit for an open/high resistance.
  4. Ignition ON, verify that a test lamp illuminates when connected between the battery positive voltage circuit terminal L and ground.
  5. If the test lamp does not illuminate, test the battery positive voltage circuit for an open/high resistance. If the circuit tests normal, test or replace the DIC.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the DIC replacement, setup, and programming.