GM Service Manual Online
For 1990-2009 cars only

A Diagnostic Starting Point -- Manual Transmission

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 Manual Transmission Description and Operation in order to identify the correct procedure for diagnosing the system and where the procedure is located.