GM Service Manual Online
For 1990-2009 cars only

Review the system and operation in order to familiarize yourself with the system functions. Refer to Locking Differential Description and Operation or Limited Slip Differential Description and Operation .

Visual/Physical Inspection

    • Inspect the system for the following:
       - Loose or missing fasteners
       - Obvious damage or conditions which may cause the symptom.
    • Check the system for proper operation. Refer to Locking Differential Diagnosis .

Symptom List

Refer to a system diagnostic procedure from the following list in order to diagnose the symptom:

    •  Locking Rear Axle Does Not Lock
    •  Locking Rear Axle Locks in Turns
    •  Locking Rear Drive Axle Chatters in Turns
    •  Noise in Addition to Normal Clutch Engagement