For 1990-2009 cars only
Symptoms - Instrument Panel, Gages and Console for GMC Truck TopKick C-Series (Conventional) C4/C5 2005
Important: The following steps must be completed before using the symptom diagnostic tables.
- Before using the symptom diagnostic tables, perform the Diagnostic System Check - Vehicle in Vehicle DTC Information in order to verify the following conditions:
- Review the system operation in order to understand the system functions. Refer to the following description and operations:
| • | There are not any DTCs set. |
| • | The control modules can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which can affect the operation of the instrument panel cluster or the audible warnings system. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | Inspect the accessible system components or the visible system components for obvious damage or for obvious conditions which can 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:
Gages and Odometer
Indicators
| • | ABS Indicator Always On in Antilock Brake System |
| • | ABS Indicator Inoperative in Antilock Brake System |
| • | Air ABS Indicator Always On in Air Antilock Brake System |
| • | Air ABS Indicator Inoperative in Air Antilock Brake System |
| • | Air Low Traction Indicator Always On in Air Antilock Brake System |
| • | Air Low Traction Indicator Inoperative in Air Antilock Brake System |
| • | Air Traction Off Indicator Always On in Air Antilock Brake System |
| • | Air Traction Off Indicator Inoperative in Air Antilock Brake System |
| • | Brake Warning Indicator Always On in Hydraulic Brakes |
| • | Brake Warning Indicator Inoperative in Hydraulic Brakes |
| • | Charge Indicator Always On in Engine Electrical |
| • | Charge Indicator Inoperative in Engine Electrical |
| • | CHECK TRANS Indicator Malfunction in Automatic Transmission |
| • | Daytime Running Lamps (DRL) Indicator Inoperative in Lighting Systems |
| • | Differential Lock Indicator Inoperative in Rear Drive Axle - Locking / Limited Slip Rear Axle |
| • | EXHAUST BRAKE Indicator Malfunction in Engine Exhaust |
| • | High Beam Indicator Inoperative in Lighting Systems |
| • | Low Air Indicator Always On in Air Brakes |
| • | Low Air Indicator Inoperative in Air Brakes |
| • | Low Engine Coolant Indicator Always On in Engine Cooling |
| • | 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) Always On in Engine Controls - 6.6 L |
| • | Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 6.6 L |
| • | Malfunction Indicator Lamp (MIL) Always On in Engine Controls - 7.8 L |
| • | Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 7.8 L |
| • | Service Brake Soon Indicator Always On in Hydraulic Brakes |
| • | Service Brake Soon Indicator Inoperative in Hydraulic Brakes |
| • | Traction Off Indicator Always On in Antilock Brake System |
| • | Traction Off Indicator Inoperative in Antilock Brake System |
| • | Trailer ABS Indicator Always On in Air Antilock Brake System |
| • | Trailer ABS Indicator Inoperative in Air Antilock Brake System |
| • | Turn Signal Lamps and/or Indicators Inoperative in Lighting Systems |
Audible Warnings
