A Preliminary Information

IMPORTANT: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Instrument Cluster or the Diagnostic System Check - Audible Warnings before using the Symptom Tables in order to verify that all of the following are true:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
^ Instrument Panel Cluster (IPC) Description and Operation
^ Driver Information Center (DIC) Description and Operation
^ Indicator/Warning Message Description and Operation
^ Audible Warnings Description and Operation

Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the Instrument Cluster, Driver Information Center or Audible Warning Systems. Refer to Checking Aftermarket Accessories in Diagrams. Diagnostic Aids
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
^ Inspect the reservoirs for the proper fluid level before beginning diagnosis.
^ Verify that the indicators work properly during the displays test.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams.

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

Gauges and Odometer
^ Engine Coolant Temperature Gage Inaccurate or Inoperative
^ Engine Oil Pressure Gage Inaccurate or Inoperative
^ Fuel Gage Inaccurate or Inoperative
^ Odometer Trip/Reset Switch Inoperative
^ Speedometer and/or Odometer Inaccurate or Inoperative
^ Volt Gage Inaccurate or Inoperative

Indicators
^ ABS Indicator Always On in Antilock Brake System Symptom Related Diagnostic Procedures
^ ABS Indicator Inoperative in Antilock Brake System Symptom Related Diagnostic Procedures
^ Air Bag Indicator Circuit Malfunction in Restraint Systems Testing and Inspection
^ Brake Warning Indicator Always On in Hydraulic Brakes Symptom Related Diagnostic Procedures
^ Brake Warning Indicator Inoperative in Hydraulic Brakes Symptom Related Diagnostic Procedures
^ Charge Indicator Always On in Starting and Charging Testing and Inspection
^ Charge Indicator Inoperative in Starting and Charging Testing and Inspection
^ Fasten Safety Belt Indicator/Chime Always On in Seat Belts Testing and Inspection
^ Fasten Safety Belt Indicator/Chime Inoperative in Seat Belts Testing and Inspection
^ High Beam Indicator Always On in Lighting and Horns Symptom Related Diagnostic Procedures
^ High Beam Indicator Inoperative in Lighting and Horns Symptom Related Diagnostic Procedures
^ Low Fuel Indicator Inoperative
^ Malfunction Indicator Lamp (MIL) Always On in Computers and Control Systems - 4.3L Malfunction Indicator Lamp (MIL) Always On
^ Malfunction Indicator Lamp (MIL) Inoperative in Computers and Control Systems - 4.3L Malfunction Indicator Lamp (MIL) Inoperative
^ Security Indicator Always On or Flashing in Antitheft and Alarm Systems Symptom Related Diagnostic Procedures
^ Security Indicator Inoperative in Antitheft and Alarm Systems Symptom Related Diagnostic Procedures
^ Service Indicator Always On in Transfer Case
^ Service Indicator Inoperative in Transfer Case
^ Tow/Haul Switch/Indicator Always On or Inoperative in Automatic Transmission 4L60E.
^ Turn Signal Lamps and/or Indicators Always On or Flashing in Lighting and Horns Symptom Related Diagnostic Procedures
^ Turn Signal Lamps and/or Indicators Inoperative in Lighting and Horns Symptom Related Diagnostic Procedures

Driver Information Center
^ Driver Information Center (DIC) Compass Inaccurate or C Displayed
^ Driver Information Center (DIC) Compass Display Inoperative
^ Driver Information Center (DIC) Inoperative
^ Driver Information Center (DIC) Switch (es) Inoperative
^ Driver Information Center (DIC) Temperature Display Always Reads OC
^ Driver Information Center (DIC) Temperature Display Always Reads SC
^ Driver Information Center (DIC) Temperature Display Inaccurate or Inoperative

Instrument Cluster Dimming
^ Interior Backlighting Does Not Dim in Lighting and Horns Symptom Related Diagnostic Procedures
^ Interior Backlighting Inoperative in Lighting and Horns Symptom Related Diagnostic Procedures

Audible Warning
^ Chime Always On
^ Chime Inoperative