GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the Starting and Charging operation and perform the necessary inspections?

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Go to Step 2

Go to Diagnostic Starting Point

2

  1. Start the engine
  2. Observe the Charge indicator on the instrument cluster (IPC)

Does the charge indicator illuminate?

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Go to Step 3

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

3

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

Does the charge indicator remain illuminated?

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Go to Step 4

Go to Step 5

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?

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Go to Step 7

Go to Step 6

5

Replace the generator. Refer to Generator Replacement .

Did you complete the replacement?

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Go to Step 7

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6

Important: Perform the set up procedure for the VCM.

Replace the VCM.

Refer to VCM Replacement/Programming in Engine Controls - 4.3L.

Did you complete the replacement?

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Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3