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 serial data circuit.
  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
    •  Instrument Cluster Gages Inoperative

Indicators

    •  ABS Indicator Malfunction
    •  Air Bag Indicator Circuit Malfunction
    •  Brake Warning Indicator Malfunction
    •  Charge Indicator Malfunction
    •  Courtesy Lamps Malfunction
    •  Cruise Control Indicator Inoperative
    •  Door Ajar Indicator Malfunction
    •  Daytime Running Lamps Malfunction
    •  Engine Oil Pressure Indicator Malfunction
    •  Front Fog Lamps Malfunction
    •  Headlamps Malfunction
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 4.8L, 5.3L, 6.0L, 6.2L or 7.0L engine
    •  Park, License, and/or Tail Lamps Malfunction
    •  Seat Belt Indicator Circuit Malfunction
    •  Security Indicator Malfunction
    •  StabiliTrak Indicator Malfunction
    •  Trailer Lamps Malfunction
    •  Turn Signal Lamps and/or Indicators Malfunction

Audible Warnings

Chime Malfunction