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If the control arm separates from the knuckle, the affected corner of the vehicle will drop and the control arm would be forced downward, contacting the wheel. The affected wheel could tilt outward and create a dragging action that would tend to slow the vehicle and create a tendency for the vehicle to turn in the direction of the affected wheel. In extreme situations, the affected wheel assembly could separate from the vehicle. Separation of the wheel assembly would also sever that wheel's hydraulic brake hose and result in diminished braking performance of the vehicle, which could result in a crash.

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On certain passenger vehicles involved in this campaign, the lower control arm ball stud nut/washer assemblies with washers were made of the wrong material. The washers may fracture and become loose or fall away from the vehicle, reducing clamp load. Separation of the control arm ball stud and steering knuckle, due to disengagement of the tapered attachment and retaining nut, is possible.
Dealers will inspect the ball stud joints and measure the torque of the nut for all front lower control arms in all models affected as well as the rear lower control arms on the xlr and Corvette. If the torque is not at specification, the dealers will replace the ball stud, the knuckle, and the nut. If the torque is at specification, the dealers will replace the nut/washer assembly only. The recall will begin on August 25, 2004. Owners should contact Cadillac at 1-866-982-2339 or Chevrolet at 1-800-630-2438.
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Date Announced
JUN 09, 2004
Vehicles Affected
Chevrolet Recall #
NHTSA Campaign #
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