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Upper Ball Joint ("S" Series)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1990 GMC S15 Pickup, 1990 GMC S15 Jimmy, 1990 GMC Pickup, 1990 GMC Cab & Chassis, and 1990 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support vehicle with jack stands under lower control arms, as close as possible to each lower ball joint. Ensure upper control arm bumper does not contact frame. Place dial indicator against lower part of wheel rim. Push in on bottom of tire while pulling outward at the top. Read dial indicator, then reverse push/pull procedure.
  2. Lateral (horizontal) deflection should not exceed .125" (3.18 mm). If deflection is excessive, replace ball joint.
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