Chevrolet 94840587 Rear Suspension Trailing Arm

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Loosen the wheel lug nuts, raise the front of the vehicle, and support it securely on jackstands while applying the parking brake before removing the wheel. Support the lower control arm with a jack or jackstand, ensuring the support point is close to the balljoint for maximum leverage. Disconnect the upper balljoint from the steering knuckle, avoiding the use of a "pickle fork" type separator to prevent damage to the balljoint seals. Remove the control arm-to-frame nuts and bolts, taking care to record the position of any alignment shims for reinstallation to maintain wheel alignment. Detach the control arm from the vehicle, noting that the control arm bushings are pressed in and require special tools for removal and installation; if replacement is necessary, take the control arm to a dealer service department or an automotive machine shop for the bushings to be pressed out and new ones pressed in. Position the control arm on the frame, install the bolts and nuts, and any alignment shims that were removed, tightening the nuts to the specified torque. Insert the balljoint stud into the steering knuckle, tighten the nut to the specified torque, and install a new cotter pin, adjusting the nut slightly if needed to align a slot with the hole in the balljoint stud. Finally, install the wheel and lug nuts, lower the vehicle, and tighten the lug nuts to the specified torque before driving to an alignment shop for a front end alignment check and adjustment if necessary.

When removing the control arm, keep in mind that the bushings are pressed in and require special tools for removal and installation. If replacement is necessary, consult a dealer service department or an automotive machine shop for assistance.