GM Service Manual Online
For 1990-2009 cars only

Important: The following steps must be completed before using the symptom tables.

  1. Perform the Diagnostic System Check - Vehicle , before using the Symptom Tables in order to verify that all of the following are true:
  2. • There are no DTCs set.
    • The control modules can communicate via the GMLAN.
  3. Review the system operation in order to familiarise yourself with the system functions. Refer to the following procedures:
  4. •  Instrument Cluster Description and Operation.
    •  Indicator/Warning Message Description and Operation.

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the instrument panel cluster (IPC). Refer to Checking Aftermarket Accessories.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    • Inspect for the correct fluid levels.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.

Symptom List

Refer to a symptom diagnostic procedure from the following lists in order to diagnose the symptom:

Gauges and Odometer

    •  Fuel Gage Inaccurate or Inoperative.
    •  Speedometer and/or Odometer Inaccurate or Inoperative.
    •  Tachometer Inaccurate or Inoperative.

Indicators

    •  ABS Indicator Always On.
    •  ABS Indicator Inoperative.
    •  Brake Warning Indicator Always On.
    •  Brake Warning Indicator Inoperative.
    •  Charge Indicator Always On.
    •  Charge Indicator Inoperative.
    •  Driver Information Center (DIC) Switch Inoperative.
    •  Engine Oil Pressure Indicator Always On.
    •  Fuel Gage Inaccurate or Inoperative.
    •  Headlamps Malfunction.
    •  Front Fog Lamps Malfunction.
    •  Traction Control Indicator Always On.
    •  Trunk Ajar Indicator Always On
    •  Trunk Ajar Indicator Inoperative
    •  Turn Signal Lamps and/or Indicators Malfunction.

Audible Warnings

Chime Always On.