GM Service Manual Online
For 1990-2009 cars only

Begin the system diagnosis by reviewing the following information:

    •  Propeller Shaft Description and Operation
    •  Transfer Case Description and Operation for the NVG 900 transfer case

Reviewing the description and operation information will help you to determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also help you to determine if the condition described by the customer is normal operation. Refer to Symptoms - Propeller Shaft to diagnose the system and locate the procedure.