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 Vehicle Diagnostic System Check 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
    •  Head Up Display (HUD) 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
    •  Tachometer Inaccurate or Inoperative

Indicators

    •  ABS Indicator Always On
    •  ABS Indicator Inoperative
    •  Air Bag Indicator Circuit Malfunction
    •  Brake Warning Indicator Always On
    •  Brake Warning Indicator Inoperative
    •  Charge Indicator Always On
    •  Charge Indicator Inoperative
    •  Door Ajar Indicator Malfunction
    •  Engine Oil Pressure Indicator Always On
    •  Fog Lamp Indicator Always On
    •  Rear Fog Lamp Indicator Always On
    •  Fog Lamp Indicator Inoperative
    •  Rear Fog Lamp Indicator Inoperative
    •  Rear Seat Heater Switch Indicator Malfunction
    •  Heated Steering Wheel Indicator Malfunction
    •  High Beam Indicator Always On
    •  High Beam Indicator Inoperative
    •  Lights On Indicator Always On
    •  Lights On Indicator Inoperative
    •  Low Engine Coolant Indicator Always On
    •  Low Washer Fluid Indicator Malfunction
    •  Malfunction Indicator Lamp (MIL) Always On for the 4.6L engine
    •  Malfunction Indicator Lamp (MIL) Inoperative for the 4.6L engine
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 4.4L engine
    •  MPH (Km/h) Indicator Inoperative
    •  Seat Belt Indicator Circuit Malfunction - Driver
    •  Seat Belt Indicator Circuit Malfunction - Passenger
    •  Security Indicator Inoperative
    •  Service Column Lock Indicator Always On
    •  Service Column Lock Indicator Inoperative
    •  Traction Control Indicator Always On
    •  Traction Control Indicator Inoperative
    •  Traction Off Indicator Always On
    •  Traction Off Indicator Inoperative
    •  Trunk Ajar Indicator Always On
    •  Trunk Ajar Indicator Inoperative
    •  Turn Signal Lamps and/or Indicators Always On or Flashing
    •  Turn Signal Lamps and/or Indicators Inoperative

Driver Information Center

Driver Information Center (DIC) Switch Inoperative

Head Up Display (HUD)

    •  Head Up Display (HUD) Inoperative
    •  Head Up Display (HUD) Image Adjustment Inoperative

Audible Warnings

    •  Chime Always On
    •  Chime Inoperative