GM Service Manual Online
For 1990-2009 cars only

Lip Seals

Lip seals, which seal rotating shafts, require special treatment. This type of seal is used on the hydraulic pump shaft of the pump. When leakage occurs in this area, always replace the seal or seals, after inspecting and thoroughly cleaning the sealing surface. Replace the shaft if pitting is found. If corrosion in the lip seal contact zone is slight, clean the surface of the shaft with crocus cloth. Replace the shaft only if the leakage cannot be stopped by smoothing with crocus cloth first.

O-Ring Seals

Whenever a part which forms a sealing surface for an O-ring is removed, the O-ring seal should also be removed and replaced with a O-ring seal. Lubricate all new O-rings with fresh power steering fluid to ease installation.