GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check for starting and charging?

Go to Step 2

Go to Diagnostic System Check - Engine Electrical

2

Start the engine.

Does the charge indicator lamp remain ON?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

3

  1. Install a scan tool.
  2. With a scan tool view the Volt Lamp parameter in the Instrument Panel Cluster (IPC) data list.

Does the scan tool indicate that the Volt Lamp parameter is ON?

Go to Step 4

Go to Charging System Test

4

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition

Go to Step 6

Go to Step 5

5

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Did you complete the replacement?

Go to Step 6

--

6

Operate the system for which the symptom occurred.

Did you correct the condition?

System OK

Go to Step 2