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 - Instrument Cluster before using the Symptom Tables in order to verify that all of the following are true:
  2. • There are no DTCs set.
    • The control module(s) 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
    •  Head Up Display (HUD) Description and Operation
    •  Audible Warnings Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the audible warnings, DIC, HUD, or IPC 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 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 in Wiring Systems.

Symptom List

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

Audible Warnings

    •  Chime Always On
    •  Chime Inoperative

Driver Information Center (DIC)

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

Gages and Odometer

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

Head-Up Display (HUD)

    •  Head Up Display (HUD) Inoperative
    •  Head Up Display (HUD) Speedometer Inoperative
    •  Head Up Display (HUD) Turn Signal Indicator Inoperative - Left and Right Side
    •  Head Up Display (HUD) Image Adjustment Inoperative
    •  Head Up Display (HUD) Intensity Does Not Vary

Indicators

    •  ABS Indicator Always On in Antilock Brake System.
    •  ABS Indicator Inoperative in Antilock Brake System.
    •  Air Bag Indicator Always On In SIR.
    •  Air Bag Indicator Does Not Come ON in SIR.
    •  Brake Warning Indicator Always On in Hydraulic Brakes.
    •  Brake Warning Indicator Inoperative in Hydraulic Brakes.
    •  Change Engine Oil Indicator Always On
    •  Change Engine Oil Indicator Inoperative
    •  Charge Indicator Always On in Engine Electrical.
    •  Charge Indicator Inoperative in Engine Electrical.
    •  Door Ajar Indicator Malfunction in Doors.
    •  Engine Coolant Temperature Indicator Always On in Engine Cooling.
    •  Engine Oil Pressure Indicator Always On
    •  Fasten Safety Belt Indicator/Chime Always On in Seat Belts.
    •  Fasten Safety Belt Indicator/Chime Inoperative in Seat Belts.
    •  High Beam Indicator Inoperative in Lighting Systems.
    •  Low Engine Coolant Indicator Always On in Engine Cooling.
    •  Low Engine Oil Level Indicator Always On
    •  Low Traction Indicator Always On in Antilock Brake System
    •  Low Traction Indicator Inoperative in Antilock Brake System.
    •  Low Washer Fluid Indicator Malfunction in Wipers/Washer Systems.
    •  Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls -- 3.1 L.
    •  Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls -- 3.8 L.
    •  Malfunction Indicator Lamp (MIL) Always On in Engine Controls -- 3.1 L.
    •  Malfunction Indicator Lamp (MIL) Always On in Engine Controls -- 3.8 L.
    •  Security Indicator Always On or Flashing in Theft Deterrent.
    •  Security Indicator Inoperative in Theft Deterrent.
    •  Traction Off Indicator Always On in Anitlock Brake System.
    •  Traction Off Indicator Inoperative in Anitlock Brake System.
    •  Trunk Ajar Indicator Always On in Body Rear End.
    •  Trunk Ajar Indicator Inoperative in Body Rear End.
    •  Turn Signal Lamps and/or Indicators Inoperative in Lighting Systems.