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 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
    •  Head Up Display (HUD) Description and Operation
    •  Audible Warnings Description and Operation
    •  Door Ajar Indicator Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the instrument cluster, the driver information display, or the audible warnings. Refer to Checking Aftermarket Accessories.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    • For any indicator or message relating to fluid level, perform a visual inspection of the fluid level before beginning diagnosis.
    • Verify that the indicators and message display works properly during the displays check.

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:

Audible Warnings

    •  Chime Always On
    •  Chime Inoperative

Driver Information Center (DIC)

    •  Driver Information Center (DIC) Temperature Display Always Reads SC
    •  Driver Information Center (DIC) Temperature Display Always Reads OC
    •  Outside Air Temperature Display Inaccurate or Inoperative
    •  Driver Information Center (DIC) Compass Inaccurate or C Displayed
    •  Driver Information Center (DIC) Switch Inoperative

Gages

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

Heads Up Display

    •  Head Up Display (HUD) 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
    •  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
    •  High Beam Indicator Inoperative
    •  Low Traction Indicator Always On
    •  Low Traction Indicator Inoperative
    •  Low Washer Fluid Indicator Malfunction
    •  Malfunction Indicator Lamp (MIL) Diagnosis
    •  Park Lamp Out Indicator Inoperative
    •  Passenger Presence System Indicator Circuit Malfunction
    •  Seat Belt Indicator Circuit Malfunction
    •  Security Indicator LED Inoperative
    •  Traction Off Indicator Always On
    •  Traction Off Indicator Inoperative
    •  Turn Signal Lamps and/or Indicators Inoperative