GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Charging System Check?

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Go to Step 2

Go to Charging System Check

2

Using the scan tool, inspect for DTCs.

Are any DTCs present?

--

Go to the Appropriate DTC

Go to Step 3

3

  1. Using the scan tool, perform the IPC Indicator Bulb Check.
  2. Turn the indicators ON and OFF.

Do all of the indicators turn ON and OFF properly?

--

Go to Step 4

Go to Instrument Cluster System Check in Instrument Panel, Gauges and Console

4

Test for voltage at pin B of the generator.

Is the voltage within the specified range?

9-16 V

Go to Step 5

Go to Step 6

5

Replace the generator.

Is the repair complete?

--

Go to Charging System Check

--

6

Locate and repair the open in CKT 225 (RED) between the generator and the PCM/VCM.

Is the repair complete?

--

Go to Charging System Check

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