GM Service Manual Online
For 1990-2009 cars only

Tapered leaf springs have three leaves of parabolic taper form. Tapered leaf springs use a front eye and rear compression shackle.

Multileaf springs use a front eye and rear slider. All springs are a two stage-design. All spring and shackle eyes are rubber bushed and non-lubricated.

Spring eyes are fully reamed in order to accept the rubber bushings. The auxiliary spring is a single leaf parabolic taper form and the frame brackets are shaped cams to produce a variable rate.

A polyurethane spring aid and rubber bump stop are attached to the frame and hang suspended above the spring center.

Dampening is provided by twin-tube shock absorbers mounted vertically behind the axle. Top and bottom attachments are pin-type with rubber insulators. The upper end is attached to a frame crossmember. The lower end is attached to a bracket that mounts below the axle housing.

Shocks are required with the tapered leaf springs. Shocks are optional with the multileaf springs.

The stabilizer shaft assembly consists of a shaft attached to the frame by two links. The ends are attached to the axle by castings mounted between the spring assembly and the axle housing.