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 test 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

    •  Fuel Gage Inaccurate or Inoperative
    •  Instrument Cluster Gages Inoperative

Indicators

    •  ABS Indicator Always On
    •  ABS Indicator Inoperative
    •  Air Bag Indicator Circuit Malfunction
    •  Brake Warning Indicator Always On
    •  Brake Warning Indicator Inoperative
    •  Change Engine Oil Indicator Always On
    •  Change Engine Oil Indicator Inoperative
    •  Charge Indicator Always On
    •  Charge Indicator Inoperative
    •  Door Ajar Indicator Malfunction
    •  Engine Coolant Temperature Indicator Always On
    •  Engine Oil Pressure Indicator Always On
    •  Low Washer Fluid Indicator Malfunction
    •  MPH (Km/h) Indicator Inoperative
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 3.8L engine
    •  Malfunction Indicator Lamp (MIL) Always On for the 5.3L engine
    •  Malfunction Indicator Lamp (MIL) Inoperative for the 5.3L engine
    •  Passenger Presence System Indicator Circuit Malfunction
    •  Seat Belt Indicator Circuit Malfunction - Driver
    •  Security Indicator LED Inoperative
    •  Stability System Disabled Indicator Always On
    •  Turn Signal Lamps and/or Indicators Always On or Flashing
    •  Turn Signal Lamps and/or Indicators Inoperative
    •  Traction Off Indicator Always On
    •  Traction Off Indicator Inoperative
    •  Trunk Ajar Indicator Always On
    •  Trunk Ajar Indicator Inoperative

Driver Information Center (DIC)

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

Head Up Display (HUD)

    •  Head Up Display (HUD) Inoperative
    •  Head Up Display (HUD) Hazard Indicators Inoperative
    •  Head Up Display (HUD) Image Adjustment Inoperative
    •  Head Up Display (HUD) Intensity Does Not Vary

Audible Warnings

    •  Chime Always On
    •  Chime Inoperative