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 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.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    • Inspect for proper fluid level.

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
    •  Engine Coolant Temperature Gage Inaccurate or Inoperative
    •  Fuel Gage Inaccurate or Inoperative

Indicators

    •  Compass Malfunction
    •  Change Engine Oil Indicator Malfunction
    •  Engine Oil Pressure Indicator Malfunction
    •  Service Indicator Always On for the BW 4484 transfer case
    •  Service Indicator Inoperative for the BW 4484 transfer case
    •  Brake Warning Indicator Malfunction
    •  ABS Indicator Malfunction
    •  StabiliTrak Indicator Malfunction
    •  Low Tire Pressure Indicator Malfunction
    •  Charge Indicator Malfunction
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 4.8L, 5.3L, 6.0L, 6.2L and 7.0L engines
    •  Tow/Haul Switch/Indicator Always On or Inoperative for the 6L50/6L80/6L90 automatic transmission
    •  Low Washer Fluid Indicator Malfunction
    •  Headlamps Malfunction
    •  Turn Signal Lamps and/or Indicators Malfunction
    •  Air Bag Indicator Circuit Malfunction
    •  Seat Belt Indicator Circuit Malfunction - Driver
    •  Security Indicator Malfunction

Driver Information Center (DIC)

Driver Information Center (DIC) Switch Malfunction

Audible Warnings

Chime Malfunction