GM Service Manual Online
For 1990-2009 cars only
    â€¢ Inspect the carrier connector for damaged splines and teeth. Replace as required.
    â€¢ Inspect the shift fork for wear, scoring, and damage to the thrust surfaces. Replace as required.
    â€¢ Inspect the differential sleeve and the inner output shaft for damaged splines and teeth. Replace as required.
    â€¢ Inspect the damper spring for breakage. Replace or repair the damper spring as needed.
    â€¢ Inspect the differential actuator and the engagement switch for damage and frayed wiring.