A Preliminary Information

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

1. Perform the Diagnostic Starting Point - Instrument Panel, Gauges and Warning Indicators before using the symptom table in order to verify that all of the following are true: Diagnostic Starting Point
^ There are no DTCs set.
^ The 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
^ 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 or audible warnings. Refer to Checking Aftermarket Accessories in Diagrams.
^ 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, message display works properly during the bulb check.

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:

Audible Warnings
For symptom diagnosis refer to one of the following:
^ Chime Always On
^ Chime Inoperative

Gages
For symptom diagnosis refer to one of the following:
^ Engine Coolant Temperature Gage Inaccurate or Inoperative
^ Engine Oil Pressure Gage Inaccurate or Inoperative
^ Fuel Gage Inaccurate or inoperative
^ Speedometer and/or Odometer Inaccurate or Inoperative
^ Tachometer Inaccurate or Inoperative
^ Volt Gage Inaccurate or Inoperative

Indicators
For symptom diagnosis refer to one of the following:
^ ABS Indicator Always On in Antilock Brake System ABS Indicator Always On
^ ABS Indicator Inoperative in Antilock Brake System ABS Indicator Inoperative
^ Air Bag Indicator Circuit Malfunction in Restraint Systems Testing and Inspection
^ For ASR OFF indicator refer to Traction Off Indicator Always On in Antilock Brake System Traction Off Indicator Always On
^ For ASR OFF indicator refer to Traction Off Indicator Inoperative in Antilock Brake System Symptom Related Diagnostic Procedures
^ Brake Warning Indicator Always On in Hydraulic Brakes Instrument Panel, Gauges and Warning Indicators
^ Brake Warning Indicator Inoperative in Hydraulic Brakes Instrument Panel, Gauges and Warning Indicators
^ Change Engine Oil Indicator Always On
^ Change Engine Oil Indicator inoperative
^ Check Gages Indicator Inoperative
^ 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
^ For the fuel level indicator refer to Fuel Gage Inaccurate or Inoperative
^ High Beam Indicator Always On in Lighting and Horns
^ High Beam Indicator Inoperative in Lighting and Horns
^ Low Engine Oil Level Indicator Always On
^ Low Traction Indicator Always On in Antilock Brake System
^ Low Traction Indicator Inoperative in Antilock Brake System
^ Malfunction Indicator Lamp (MIL) Always On in Computers and Control Systems-3.8L Testing and Inspection
^ Malfunction Indicator Lamp (MIL) Inoperative in Computers and Control Systems-3.8L Testing and Inspection
^ Malfunction Indicator Lamp (MIL) Always On in Computers and Control Systems-5.7L Testing and Inspection
^ Malfunction Indicator Lamp (MIL) Inoperative in Computers and Control Systems-5.7L Testing and Inspection
^ Security Indicator Always On or Flashing in Antitheft and Alarm Systems
^ Security Indicator Inoperative in Antitheft and Alarm Systems
^ For Skip Shift indicator refer to Diagnostic System Check - Skip Shift System in Manual Transmission-MM6
^ For TCS OFF indicator refer to Traction Off Indicator Always On in Antilock Brake System ABS Indicator Always On
^ For TCS OFF indicator refer to Traction Off Indicator Inoperative in Antilock Brake System Acceleration Slip Regulation Indicator Inoperative
^ Trunk Ajar Indicator Always On in Trunk/Liftgate
^ Trunk Ajar Indicator Inoperative in Trunk/Liftgate
^ Turn Signal Lamps and/or Indicators Always On or Flashing in Lighting and Horns
^ Turn Signal Lamps and/or Indicators Inoperative in Lighting and Horns

"For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application ID".