GM Service Manual Online
For 1990-2009 cars only

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

  1. Perform Diagnostic System Check - Instrument Cluster and Diagnostic System Check - Audible Warnings 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 link.
  3. Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
  4. •  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 could affect the operation of the Instrument Cluster or Audible Warning Systems. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    • Inspect the applicable reservoir for the proper fluid level related to the indicator or message.
    • Verify that the indicators work properly during the displays test.

Intermittent

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

Symptom List

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

Gages

    •  Engine Coolant Temperature Gage Inaccurate or Inoperative
    •  Engine Oil Pressure Gage Inaccurate or Inoperative
    •  Fuel Gage Inaccurate or Inoperative
    •  Speedometer and/or Odometer Inaccurate or Inoperative
    •  Tachometer Inaccurate or Inoperative
    •  Volt Gage Inaccurate or Inoperative

Indicators

    •  ABS Indicator Always On in Antilock Brake System
    •  ABS Indicator Inoperative in Antilock Brake System
    •  Air Bag Indicator Circuit Malfunction
    •  Charge Indicator Always On in Engine Electrical
    •  Charge Indicator Inoperative in Engine Electrical
    •  High Beam Indicator Always On in Lighting Systems
    •  High Beam Indicator Inoperative in Lighting Systems.
    •  Malfunction Indicator Lamp (MIL) Always On in Engine Controls - 2.8L
    •  Malfunction Indicator Lamp (MIL) Always On in Engine Controls - 3.5L
    •  Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 2.8L
    •  Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 3.5L
    •  Security Indicator Inoperative in Theft Systems
    •  Service Four-Wheel Drive Indicator Always On in Transfer Case
    •  Service Four-Wheel Drive Indicator Inoperative in Transfer Case
    •  Traction Off Indicator Inoperative in Antilock Brake System
    •  Turn Signal Lamps and/or Indicators Always On or Flashing in Lighting Systems
    •  Turn Signal Lamps and/or Indicators Inoperative in Lighting Systems

Instrument Cluster Dimming

    •  Interior Backlighting Does Not Dim in Lighting Systems
    •  Interior Backlighting Inoperative in Lighting Systems

Odometer

Odometer Trip/Reset Switch Inoperative

Audible Warning

    •  Chime Always On
    •  Chime Inoperative