GM 15820927 Rear Suspension Trailing Arm Assembly

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For the removal of Trailing Arm 1, first release the rear wheel lug nuts and secure the front wheels. Next, lift the back of your vehicle and set it up on sturdy jackstands. Remove the rear wheels as well as the back part of the exhaust system. Lastly, unhook from stabilizer bar link at stabilizer bar and if there is any disconnect ABS wiring harness clips from arm. On trailing arms' rear knuckle remove mounting fasteners for both trailing arms and detach both arms from knuckle. Take off hydraulic brake line from above of rear suspension support and place a floor jack under it. Raise this until only touch its center with that support just a bit higher to make sure it does not slip out when a bolt is removed in step seventeen below. Unbolt rear suspension support on same side that arm is being removed from and loosen bolts on opposite side of support. Lower slowly with floor jack until trailing arm's mounting fasteners can be reached by you in case if required put one big bolt through last hole so that after flooring we will use that bolt to pull beam down safe .A pipe clamp put around top so we could tighten them all together so that they won't move apart anymore but check also what kind of other connections may exist between parts here.Put a stack or 2x4s on ground next to where jack will stand take stand out place directly under blue lifting device . Now go ahead remove remaining nuts completely before taking even larger ones loose then look carefully inspect bushings both sides neatness because if necessary replace these things (two small metal inserts into rubber) otherwise don't take anything off yet or else would be forced having them repaired pretty soon anyway. For Trailing Arm 2 follow exactly the same steps like those followed for Trailing Arm 1.To remove Trailing Arm, take out bracket-to-body mounting bolts and trailing arm-to-knuckle mounting fasteners of trailing arm. Finally, remove the trailing arm and check the condition of its bushing. Take it for bushing replacement if necessary.

Installation is the reverse of removal, with all fasteners tightened to torque specifications. A front wheel alignment check and adjustment are recommended.

Detach the ABS wheel speed sensor harness from the arm, and remove the trailing arm-to-knuckle bolts. Remove the trailing arm bracket-to-body bolts and remove the arm. If the bushing needs replacement, seek professional assistance.

After that, remove the fasteners that attach the control arm to the subframe and separate the control arm from the subframe.

To remove Suspension Arm 1, you need to detach the rear portion of the exhaust system, disconnect the stabilizer bar link, remove the ABS wiring harness clips, and detach the hydraulic brake line.

To remove Suspension Arm 1, you need to detach the rear portion of the exhaust system, disconnect the stabilizer bar link, remove the ABS wiring harness clips, and detach the hydraulic brake line. Then, place a floor jack beneath the rear suspension support, raise it slightly, and remove the mounting bolts for the rear suspension support. Lower the support to gain access to the suspension arm's mounting fasteners, and finally, remove the arm and inspect the bushings for deterioration.

For inspection, check the control arm for distortion and the bushings for wear, replacing any worn or damaged parts. Do not attempt to straighten a bent control arm. If the bushings are cracked or show signs of wear, take the control arm to have the bushings replaced.