GM Service Manual Online
For 1990-2009 cars only

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

  1. Before using the symptom diagnostic tables, perform the Diagnostic System Check - Vehicle in order to determine that there are no DTCs set, and that the control modules can communicate via the serial data link.
  2. Review the system operation in order to understand the system functions. Refer to the following description and operations:
  3. •  Instrument Cluster Description and Operation
    •  Indicator/Warning Message Description and Operation
    •  Driver Information Center (DIC) Description and Operation
    •  Audible Warnings Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which can affect the operation of the instrument panel cluster or the audible warnings system. Refer to Checking Aftermarket Accessories.
    • Inspect the accessible system components or the visible system components for obvious damage or for obvious conditions which can cause the symptom.
    • Inspect for the proper 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 list in order to diagnose the symptom:

Gages and Odometer

    •  Instrument Cluster Gages Inoperative
    •  Fuel Gage Inaccurate or Inoperative

Indicators

    •  ABS Indicator Malfunction
    •  Air Bag Indicator Circuit Malfunction
    •  Brake Warning Indicator Malfunction
    •  Charge Indicator Malfunction
    •  Door Ajar Indicator Malfunction
    •  Daytime Running Lamps Malfunction
    •  Engine Coolant Temperature Indicator Malfunction
    •  Engine Oil Pressure Indicator Malfunction
    •  Front Fog Lamps Malfunction
    •  Headlamps Malfunction
    •  Hood Ajar Indicator/Message Malfunction
    •  Low Washer Fluid Indicator Malfunction
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 3.8L engine
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 4.8L, 5.3L, 6.0L, 6.2L, and 7.0L engines
    •  Passenger Presence System Indicator Circuit Malfunction
    •  Seat Belt Indicator Circuit Malfunction - Driver
    •  Seat Belt Indicator Circuit Malfunction - Passenger
    •  Security Indicator Malfunction
    •  Turn Signal Lamps and/or Indicators Malfunction
    •  Trunk Ajar Indicator Malfunction

Driver Information Center

    •  Driver Information Center (DIC) Inoperative
    •  Driver Information Center (DIC) Switch Malfunction

Audible Warnings

Chime Malfunction