For 1990-2009 cars only
Important: The following steps must be completed before using the symptom tables.
- Perform Diagnostic System Check - Instrument Cluster before using the Symptom Tables in order to verify that all of the following are true:
- Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
| • | There are no DTCs set. |
| • | The control module(s) can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the Instrument Cluster or Audible Warning 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 the reservoirs for the proper fluid level before beginning diagnosis. |
| • | Inspect the applicable reservoir for the proper fluid level related to the indicator or message. |
| • | Verify that the indicators work properly during the bulb check. |
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:
Gauges
| • | Tachometer Inaccurate or Inoperative. Refer to Tachometer Inoperative |
| • | Tachometer Inaccurate or Inoperative. Refer to Tachometer Inaccurate |
Indicators
| • | ABS Indicator Always On or Inoperative. Refer to Diagnostic System Check in Antilock Brake System. |
| • | AIR BAG Indicator Always On or Inoperative. Refer to Diagnostic System Check - SIR in SIR. |
| • | Brake Warning Indicator Always On or Inoperative. Refer to Diagnostic System Check in Hydraulic Brakes. |
| • | SERVICE ENGINE SOON Indicator (MIL) Always On or Inoperative. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 4.3L. |
| • | SERVICE ENGINE SOON Indicator Always On or Inoperative. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 4.8L, 5.3L, 6.0L. |
| • | Fasten Safety Belt Indicator/Chime Always On in Seat Belts. |
| • | Fasten Safety Belt Indicator/Chime Inoperative in Seat Belts. |
| • | High Beam Indicator Always On in Lighting Systems. |
| • | High Beam Indicator Inoperative in Lighting Systems. |
| • | Turn Signal Indicators Inoperative - Left Side in Lighting Systems. |
| • | Turn Signal Indicators Inoperative - Right Side in Lighting Systems. |
| • | CRUSE Indicator Always On or Inoperative. Refer to Diagnostic System Check - Cruise Control in Cruse Control. |
| • | TOW/HAUL Indicator Always On or Inoperative. Refer to Tow/Haul Switch/Indicator Always On or Inoperative in Automatic Transmission - 4L60E. |
| • | TOW/HAUL Indicator Always On or Inoperative. Refer to Tow/Haul Switch/Indicator Always On or Inoperative in Automatic Transmission - 4L60E. |
| • | TOW/HAUL Indicator Always On or Inoperative. Refer to Tow/Haul Switch/Indicator Always On or Inoperative in Automatic Transmission - 4L80E. |
| • | 4WD Indicator Always On. Refer to Four-Wheel Drive Indicator Does Not Turn Off in Automatic Transfer Case. |
| • | 4WD Indicator Inoperative. Refer to Four-Wheel Drive Indicator Does Not Light in Automatic Transfer Case. |
Message Center
| • | CHECK COOLANT TEMP Message Always On or Inoperative. Refer to Engine Overheating |
| in Engine Cooling. |
| • | ENGINE OVERHEATED Message Always On or Inoperative. Refer to Engine Overheating in Engine Cooling. |
| • | LOW COOLANT Message Always On or Inoperative. Refer to Low Engine Coolant Level Indicator Diagnosis |
| in Engine Controls - 4.3L |
| • | LOW COOLANT Message Always On or Inoperative. Refer to Engine Coolant Level Switch/Sensor Diagnosis in Engine Controls - 4.8L, 5.3L and 6.0L. |
| • | LOW WASHER FLUID Message Always On in Wipers/Washers System. |
| • | LOW WASHER FLUID Message Inoperative in Wipers/Washers System. |
| • | BATTERY Message Always ON. Refer to Battery Charge Indicator Always On in Engine Electrical. |
| • | BATTERY Message Inoperative. Refer to Battery Charge Indicator Inoperative in Engine Electrical. |
| • | CARGO DOOR AJAR Message Always ON. Refer to Body Rear End. |
| • | CARGO DOOR AJAR Inoperative. Refer to Body Rear End. |
| • | CARGO LAMP ON Message Inoperative in Lighting Systems. |
| • | CARGO LAMP ON Message Always On in Lighting Systems. |
| • | SECURITY Message Always On or Inoperative. Refer to Diagnostic System Check - Theft Deterrent in Theft Deterrent. |
| • | SERVICE 4WD Message Always On or Inoperative. Refer to Diagnostic System Check in Automatic Transfer Case - NVG 246. |
| • | SERVICE 4WD Message Always On or Inoperative. Refer to Diagnostic System Check in Automatic Transfer Case - NVG 261. |
| • | SERVICE RIDE CONTROL Message Always ON. Refer to SERVICE RIDE CONTROL Message Always On in Real Time Damping - RTD. |
| • | SERVICE RIDE CONTROL Message Inoperative. Refer to SERVICE RIDE CONTROL Message Inoperative in Real Time Damping - RTD. |
Instrument Cluster Dimming
| • | Instrument Cluster Illumination Lamps Inoperative in Lighting Systems. |
| • | Instrument Panel Lamps Do Not Dim in Lighting Systems. |
Odometer
PRNDL Display
