Genuine Buick LaCrosse Trailing Arm

Buick LaCrosse Trailing Arm Parts Questions & Answers

• Rear Upper Suspension Control Arm Assembly
  20900531
  Q: How do you remove the Trailing Arm on 2010 and later Buick LaCrosse?

  A: To take off the upper trailing arm for any model, loosen lug nuts on wheels, lift up the vehicle and secure with jack stands. Pull out the bolt of the ABS wheel speed sensor harness from the trailing arm. Use a floor jack to brace the lower Control Arm and then unfasten nut as well as bolt leading into knuckle of upper trailing arm. Rear suspension models with RPO GNE should have their alignment marks created on an adjuster cam for upper trailing with respect to subframe prior to removal of nut and cam. Additionally remove pivot bolt. In contrast, cars that have been outfitted with GNC rear suspension must lose their inner pivot bolts for respective upper trailing arms. Upon removal, these are replaced in reverse order. Finally bring lower control arm back up to normal ride height and tighten fasteners accordingly according to torque specification supplied by manufacturer of your car.Use new fasteners during installation of RPO GNC rear suspension for upper trailing arm.Raise outer end of trailing arm using floor jack in order to attain normal ride height-tight all bolts according to torque specifications given by manufacturer.Install wheel and lug nuts; lower vehicle and tighten lug nuts (to specified torque). Check wheel alignment if necessary.Cut away coil spring first when removing lower run bar.For cars that come equipped with RPO GNE rear suspension remove shock absorber's bottom mounting bolt or make sure you mark the adjuster cam against the sub-frame in case it has RPO GNC rear suspension.Proceed by detaching said arms from sub-frame whereupon they can be removed after taking out their corresponding pivot bolts.Place trailing arm while simulating normal ride height near outer end using hoist.Raised outer end of running bar using jack stand making it appear like how it would be under normal operating conditions-Tighten every single nut having made reference to specifications furnished by automaker.Put wheels back onto vehicle; let down automobile onto pavement while observing correct torque for tightening lug nuts.Get wheel alignment checked. Remove the Coil Springs to take down trailing arm.Putting it in a different way, RPO GNE rear suspension will require one to eradicate shock absorbers by taking off its bottom mounting bolt or if it is powered by RPO GNC rear suspension, marking the adjuster cam on the sub-frame.Remove trailing arm subframe pivot bolts and detach arms from subframes-lift outer end of trailing arm with hoist in order to simulate normal ride height and tighten all bolts according to the required torque specifications.Installation of wheels and their fastening nuts should be done; vehicles lowered, while nuts are tightened at required degree.Remove lower link-to-knuckle bolt then remove links.Raise outer end of running bar using jack stand making it appear like how it would be under normal operating conditions-Tighten every single nut having made reference to specifications furnished by automaker.Put wheels back onto vehicle; let down automobile onto pavement while observing correct torque for tightening lug nuts.Check wheel alignment if necessary.
• Rear Suspension Trailing Arm Assembly
  15820927
  Q: How do I remove Suspension Arm for 2009 and earlier Buick LaCrosse?

  A: 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.