GM Service Manual Online
For 1990-2009 cars only

Vibration

Checks

Causes

Torque Converter (55)

    â€¢ Out of balance
    â€¢ Internal Failure

Transmission or Engine

Misaligned

Output (94) or Stub Shafts (58)

    â€¢ Out of balance
    â€¢ Worn or damaged bushings

Turbine Shaft (39)

    â€¢ Out of balance
    â€¢ Worn bushings