Investigation EA88007: 1984–1987 Chevrolet C30

Status

CLOSED

Opened

Nov 6, 1987

Closed

Oct 24, 1988

Model years

1984–1987

Subject

Lower control arm

Component: Suspension

Summary

Summary of information from manufacturer:manufacturer is in receipt ofone complaint and five field reports.product report analysis states thelower control arm from waggoner corporation appears to have a small radiusat the transition of the side wall to the ball stud nose.current stampingsource, s.k.d., also has a small radius in the same area.s.k.d. Haschanged the trim to increase the radius to 1 inch and provide additionalstrength in the ball stud area.analysis:failure data indicates the left control arm and diesel engineapplication are over represented.all known failures have occurred at lowspeeds, or have been located as a result of an increase in the frequency ofmaintenance inspections.ball joint separation could result in collapse offront wheel suspension and loss of vehicle control.action: ir to gm sent 11/19/87 contact fleet owners.===

An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.