GM Service Manual Online
For 1990-2009 cars only

The lip seals seal rotating shafts. The lip seals require special treatment. The steering gear and the drive shaft of the steering pump use this type of seal. Inspect and thoroughly clean the sealing surfaces. When there is a leak in one of these areas, always replace the seal(s).

Replace the shaft only if you find very severe pitting.

If the corrosion in the lip seal contact zone is slight, clean the surface of the shaft with a crocus cloth. Replace the shaft only if you can not stop the leakage by smoothing the shaft with the crocus cloth.