Buick 25990164 Rear Suspension Trailing Arm Assembly

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Installation follows the reverse of the removal process with new fasteners and proper tightening.

Yes, for RPO GNE, scribe an alignment mark on the upper control arm adjuster cam to the subframe before removing the nut and cam, and remove the pivot bolt. For RPO GNC, remove the upper control arm inner pivot bolt.

Start by loosening the rear wheel lug nuts and blocking the front wheels. Raise the rear of the vehicle and support it securely on jackstands. Remove the rear wheels and the rear portion of the exhaust system.

Loosen the wheel lug nuts, apply the parking brake, and raise the front of the vehicle. Support it securely on jackstands and remove the wheel.

Finally, it is recommended to have the front wheel alignment checked and adjusted if necessary after completing this job.

To remove and replace the rear suspension components, start by loosening the rear wheel lug nuts and blocking the front wheels to prevent the vehicle from rolling. Then, raise the rear of the vehicle and support it securely on jackstands. Remove the rear wheels and proceed to remove Trailing Arm 1 by detaching the rear portion of the exhaust system, disconnecting the stabilizer bar link, removing the ABS wiring harness clips, and detaching the hydraulic brake line. Place a floor jack beneath the rear suspension support and raise it slightly, then remove the mounting bolts for the rear suspension support and lower it to gain access to the trailing arm's mounting fasteners. Remove the arm and inspect the bushings for deterioration. For Trailing Arm 2, follow similar steps, including detaching the stabilizer bar link and removing the mounting fasteners for both trailing arms at the rear knuckle. Lower the rear suspension support to access the trailing arm's mounting fasteners, remove the arm, and inspect the bushings. Finally, for the trailing arm, remove the trailing arm bracket-to-body mounting bolts and the trailing arm-to-knuckle mounting fasteners. Inspect the trailing arm bushing and then reinstall the components, ensuring the mounting fasteners are tightened to the correct torque specifications. It is recommended to have the wheel alignment checked and, if necessary, adjusted, and to take the trailing arm to a shop for bushing replacement.