GM Service Manual Online
For 1990-2009 cars only

Begin the system diagnosis by reviewing the following Description and Operations:

    •  Battery Description and Operation
    •  Starting System Description and Operation
    •  Charging System Description and Operation

Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Engine Electrical in order to identify the correct procedure for diagnosing the system and where the procedure is located.