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

  1. Turn ON the ignition, with the engine OFF.
  2. Observe the Charge indicator on the instrument cluster (IPC).

Does the charge indicator illuminate?

Go to Step 3

Go to Symptoms - Engine Electrical

3

  1. Turn OFF the ignition.
  2. Disconnect the generator connector.
  3. Turn ON the ignition, with the engine OFF.

Does the charge indicator illuminate?

Go to Step 4

Go to Charging System Test

4

Test the charge indicator control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Important: Perform the set up procedure for the PCM.

Replace the PCM. Powertrain Control Module Replacement in Engine Controls - 4.8L, 5.3L and 6.0L.

Did you complete the replacement?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3