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Rear Suspension System Buick LaCrosse II

Suspension Rear 20 illustrations ~1679 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Rear Axle Lower Control Arm Inner Fastener90 N.m + 60 degrees66 lb ft + 60 degrees
Rear Axle Lower Control Arm Outer Fastener (GNC)70 N.m + 90 degrees + 15 degrees51 lb ft + 90 degrees + 15 degrees
Rear Axle Lower Control Arm Outer Fastener (GNE)115 N.m + 90 degrees + 15 degrees85 lb ft + 90 degrees + 15 degrees
Rear Axle Upper Control Arm Inner Fastener150 N.m111 lb ft
Rear Axle Upper Control Arm Outer Fastener115 N.m + 90 degrees + 15 degrees85 lb ft + 90 degrees + 15 degrees
Rear Suspension Link Inner Fastener150 N.m111 lb ft
Rear Suspension Link Fastener150 N.m + 60 degrees + 15 degrees111 lb ft + 60 degrees + 15 degrees
Rear Suspension Link Outer Fastener150 N.m + 60 degrees + 15 degrees111 lb ft + 60 degrees + 15 degrees
Rear Wheel Hub Fastener90 N.m + 75 degrees66 lb ft + 75 degrees
Shock Absorber Bracket Nut30 N.m + 60 degrees + 15 degrees22 lb ft + 60 degrees + 15 degrees
Shock Absorber Lower Fastener (GNC)100 N.m + 75 degrees74 lb ft + 75 degrees
Shock Absorber Lower Fastener (GNE)150 N.m + 60 degrees + 15 degrees111 lb ft + 60 degrees + 15 degrees
Shock Absorber Upper Fastener (GNC)100 N.m + 75 degrees74 lb ft + 75 degrees
Shock Absorber Upper Fastener (GNE)110 N.m81 lb ft
Stabilizer Shaft Insulator Fastener22 N.m + 30 degrees16 lb ft + 30 degrees
Stabilizer Shaft Link Fastener50 N.m37 lb ft
Support Bolts (GNC)90 N.m + 120 degrees + 15 degrees66 lb ft + 120 degrees + 15 degrees
Support Bolts (GNE)150 N.m + 30 degrees + 15 degrees111 lb ft + 30 degrees + 15 degrees
Trailing Arm Fastener150 N.m + 30 degrees111 lb ft + 30 degrees

Fastener Tightening Specifications

Adhesives, Fluids, Lubricants, and Sealers

ApplicationType of MaterialGM Part Number
Rear Shock Absorber Bolts Upper BodyThreadlockRefer to Electronic Parts Catalog

Adhesives, Fluids, Lubricants, and Sealers

Scheme 1

Scheme 1: Rear Wheel Bearing and Hub Replacement (GNC)
Scheme 1: Rear Wheel Bearing and Hub Replacement (GNC)
CalloutComponent Name
Preliminary Procedure Remove the rear tire and wheel. Refer to Tire and Wheel Removal and Installation . Remove the rear wheel speed sensor. Refer to Rear Wheel Speed Sensor Replacement (4-Link) , Rear Wheel Speed Sensor Replacement (H-Arm) Remove the rear brake rotor. Refer to Rear Brake Rotor Replacement (J60) , Rear Brake Rotor Replacement (J61) .
1Rear Wheel Bearing Bolts (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure Remove the upper control arm. Refer to Rear Axle Upper Control Arm Replacement (GNC) , Rear Axle Upper Control Arm Replacement (GNE) . Remove and discard the bolts. DO NOT reuse, replace with NEW only. Tighten First Pass: 90 N.m (66 lb ft) Final Pass: plus 75 degrees
2Rear Wheel Bearing CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Rear Wheel Bearing and Hub Replacement (GNC)

Scheme 2

Scheme 2: Rear Wheel Bearing and Hub Replacement (GNE)
Scheme 2: Rear Wheel Bearing and Hub Replacement (GNE)
CalloutComponent Name
Preliminary Procedures Remove the rear tire and wheel. Refer to Tire and Wheel Removal and Installation . Remove the rear wheel speed sensor. Refer to Rear Wheel Speed Sensor Replacement (4-Link) , Rear Wheel Speed Sensor Replacement (H-Arm) . Separate the wheel drive shaft from the knuckle. Refer to Rear Wheel Drive Shaft Replacement . Remove the rear brake rotor. Refer to Rear Brake Rotor Replacement (J60) , Rear Brake Rotor Replacement (J61) . Remove the rear spring. Refer to Rear Spring, Insulator, and Jounce Bumper Replacement (GNE) . Remove lower control arm bolt and nut from the rear wheel hub bracket. Refer to Rear Suspension Control Arm Replacement .
1Rear Wheel Bearing Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure Remove and discard the rear wheel hub bolts and install the NEW bolts. Tighten 90 N.m (66 lb ft)
2Rear Wheel Bearing CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Rear Wheel Bearing and Hub Replacement (GNE)

Scheme 3

Scheme 3: Rear Wheel Hub Bracket Replacement (GNE)
Scheme 3: Rear Wheel Hub Bracket Replacement (GNE)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Remove the rear wheel bearing and hub. Refer to Rear Wheel Bearing and Hub Replacement (GNC) , Rear Wheel Bearing and Hub Replacement (GNE) .
1Rear Wheel Hub Bracket CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Support the rear suspension lower control arm with a suitable jack stand. Remove the rear suspension link from the upper and lower control arms. Refer to Rear Suspension Link Replacement - Upper to Lower Control Arm (GNE) . Remove the bolt from the adjust link to the rear wheel hub bracket. Refer to Adjust Link Replacement (GNC) , Adjust Link Replacement (GNE) Remove the bolt from the shock absorber to the rear wheel hub bracket. Refer to Shock Absorber Replacement (GNE) , Shock Absorber Replacement (GNC) .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Rear Wheel Hub Bracket Replacement (GNE)

Scheme 4

Scheme 4: Rear Suspension Link Replacement - Upper to Lower Control Arm (GNE)
Scheme 4: Rear Suspension Link Replacement - Upper to Lower Control Arm (GNE)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
1Rear Suspension Link Nut (Qty: 2)
2Rear Suspension Link Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure Remove and discard the bolt, replace with NEW only. Tighten First Pass: 150 (111 lb ft) Final Pass: plus 60 degrees
3Rear Suspension Link CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Support the rear suspension lower control arm with the proper jack stand.
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Rear Suspension Link Replacement - Upper to Lower Control Arm (GNE)

Scheme 5

Scheme 5: Rear Axle Upper Control Arm Replacement (GNC)
Scheme 5: Rear Axle Upper Control Arm Replacement (GNC)
CalloutComponent Name
Preliminary Procedures Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
1Rear Suspension Upper Control Arm Nut CAUTION: Refer to Fastener Caution . CAUTION: This bolt is designed to permanently stretch when tightened, and therefore MUST be replaced anytime it is removed. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged. Procedure Remove and discard the nut and the bolt, replace with NEW only. Tighten 70 N.m (52 lb ft) + 60 degrees
2Rear Suspension Upper Control Arm
3Rear Suspension Upper Control Arm Nut Procedure Remove and discard the nut and the bolt, replace with NEW only. Tighten 150 N.m (85 lb ft) + 90 degrees
4Rear Suspension Upper Control Arm Bolt Procedure Remove and discard the bolt, replace with NEW only.
5Rear Suspension Upper Control Arm
CAUTION
Refer to Fastener Caution .
CAUTION
This bolt is designed to permanently stretch when tightened, and therefore MUST be replaced anytime it is removed. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged.

Rear Axle Upper Control Arm Replacement (GNC)

Scheme 6

Scheme 6: Rear Axle Upper Control Arm Replacement (GNE)
Scheme 6: Rear Axle Upper Control Arm Replacement (GNE)
CalloutComponent Name
Preliminary Procedures Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
1Rear Suspension Upper Control Arm Inner Nut CAUTION: Refer to Fastener Caution . Tighten 150 N.m (111 lb ft)
2Rear Suspension Upper Control Arm Washer
3Rear Suspension Upper Control Arm Inner Bolt
4Rear Axle Upper Control Arm Procedure Use a proper jack stand, support the lower control arm and the rear wheel bracket. Remove the bolt from the upper control to the lower control arm. Refer to Rear Suspension Link Replacement - Upper to Lower Control Arm (GNE) . Remove cable harness clips from control arm. Verify the rear wheel alignment. Refer to Wheel Alignment Measurement .
CAUTION
Refer to Fastener Caution .

Rear Axle Upper Control Arm Replacement (GNE)

Scheme 7

Scheme 7: Rear Suspension Control Arm Replacement
Scheme 7: Rear Suspension Control Arm Replacement
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
1Rear Wheel Hub Bracket Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure Remove and discard the bolts. DO NOT reuse, replace with NEW only. Tighten First Pass: 150 N.m (111 lb ft) Final Pass: plus 30 degrees Special Tools EN-45059 Angle Meter For equivalent regional tools, refer to Special Tools .
2Rear Suspension Control Arm Bracket Bolt (Qty: 2) Procedure Remove and discard the bolts. DO NOT reuse, replace with NEW only. Tighten First Pass: 150 N.m (111 lb ft) Final Pass: plus 30 degrees
3Rear Suspension Control Arm CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Remove the rear speed sensor harness from the rear suspension control arm. Refer to Rear Wheel Speed Sensor Replacement (4-Link) , Rear Wheel Speed Sensor Replacement (H-Arm) .
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Rear Suspension Control Arm Replacement

Scheme 8

Scheme 8: Rear Suspension Control Arm Bushing Replacement
Scheme 8: Rear Suspension Control Arm Bushing Replacement
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear suspension control arm. Refer to Rear Suspension Control Arm Replacement .
1Rear Suspension Control Arm Bushing Procedure Using the CH-21474 kit, install the rear suspension control arm bushing. Adjust the rear suspension control arm bushing 18.7 mm from center of hole, when parallel to bushing console with the J-21474 kit. Special Tools CH-21474 Remover/Installer Kit For equivalent regional tools, refer to Special Tools .

Rear Suspension Control Arm Bushing Replacement

Scheme 9

Scheme 9: Rear Axle Lower Control Arm Replacement (GNC)
Scheme 9: Rear Axle Lower Control Arm Replacement (GNC)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Remove the rear spring. Refer to Rear Spring, Insulator, and Jounce Bumper Replacement (GNE) .
1Rear Suspension Lower Control Arm Inner Nut CAUTION: Refer to Fastener Caution . Tighten First Pass: 90 N.m (66 lb ft) Final Pass: plus 60 degrees Special Tools EN-45059 Angle Meter For equivalent regional tools, refer to Special Tools .
2Rear Suspension Lower Control Arm Washer
3Rear Suspension Lower Control Arm Bolt Procedure Remove and discard the bolt. DO NOT reuse, replace with NEW only.
4Rear Suspension Lower Control Arm Nut
5Rear Suspension Lower Control Arm Bolt Procedure Remove and discard the bolt. DO NOT reuse, replace with NEW only. Tighten First Pass: 70 N.m (51 lb ft) Final Pass: plus 90 degrees Special Tools EN-45059 Angle Meter For equivalent regional tools, refer to Special Tools .
6Rear Lower Control Arm CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Check the rear alignment after installation. Refer to Wheel Alignment Measurement .
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Rear Axle Lower Control Arm Replacement (GNC)

Scheme 10

Scheme 10: Rear Axle Lower Control Arm Replacement (GNE)
Scheme 10: Rear Axle Lower Control Arm Replacement (GNE)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Remove the rear spring. Refer to Rear Spring, Insulator, and Jounce Bumper Replacement (GNE) . Remove the shock absorber lower bolt at the rear wheel hub bracket. Refer to Shock Absorber Replacement (GNE) , Shock Absorber Replacement (GNC) .
1Rear Suspension Lower Control Arm Nut CAUTION: Refer to Fastener Caution . Tighten First Pass: 150 N.m (111 lb ft) Final Pass: plus 90 degrees
2Rear Suspension Lower Control Arm Bolt Procedure Remove and discard the bolt. DO NOT reuse, replace with NEW only.
3Rear Suspension Lower Control Arm Nut Tighten First Pass: 150 N.m (111 lb ft) Final Pass: plus 90 degrees
4Rear Suspension Lower Control Arm Bolt Procedure Remove and discard the bolt. DO NOT reuse, replace with NEW only.
5Rear Suspension Link Lower Nut Tighten First Pass: 150 N.m (111 lb ft) Final Pass: plus 90 degrees
6Rear Suspension Link Lower Bolt Procedure Remove and discard the bolt. DO NOT reuse, replace with NEW only.
7Rear Suspension Lower Control Arm CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Lower the fuel tank so as to gain enough clearance to remove the lower control arm from the vehicle. For those vehicles equipped with the 2.2L/2.4L, refer to Fuel Tank Replacement . For those vehicles equipped with the 2.8L/3.0L/3.2L/3.6L, refer to Fuel Tank Replacement (With AWD) , Fuel Tank Replacement (With FWD) . Use a proper jack stand to load the control arm when tightening the bolts
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Rear Axle Lower Control Arm Replacement (GNE)

Scheme 11

Scheme 11: Stabilizer Shaft Replacement (GNE)
Scheme 11: Stabilizer Shaft Replacement (GNE)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Disconnect the stabilizer links from the stabilizer shaft. Refer to Stabilizer Shaft Link Replacement .
1Stabilizer Shaft Insulator Fastener (Qty: 4) Install NEW clamp bolts. CAUTION: Refer to Fastener Caution . Tighten 22 N.m (16 lb ft) + 30 degrees
2Stabilizer Shaft Bracket (Qty 2)
3Stabilizer Shaft Procedure Replace insulator if necessary.
CAUTION
Refer to Fastener Caution .

Stabilizer Shaft Replacement (GNE)

Removal Procedure

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/ii-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/lacrosse/ii-2009-2013/remont/wheel-tire-system/#tires-and-wheels) .
  3. Remove the rear muffler assembly. Refer to «Exhaust Muffler Replacement (Single)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) , «Exhaust Muffler Replacement (LFX)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
  4. Remove the rear suspension control arm bolts from the body. Refer to «Rear Suspension Control Arm Replacement»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  5. Remove the rear spring. Refer to «Rear Spring, Insulator, and Jounce Bumper Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  6. Remove the park brake cables from the trailing arms. Refer to «Parking Brake Rear Cable Replacement (J71)»(/buick/lacrosse/ii-2009-2013/remont/parking-brake-system/#parking-brake-system) .
  7. Without disconnecting the hydraulic brake hose from the caliper, remove and support the brake caliper. Refer to «Rear Brake Caliper Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical-hydraulic/#disc-brake-system) .
  8. Remove the lower shock absorber bolts. Refer to «Shock Absorber Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Shock Absorber Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  9. Support and secure adjustable jack stands to the rear support.
  10. Mark up support position to body with spray paint.
  11. Remove the mounting bolts (1) for the support. Refer to «Rear Suspension Support Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) , «Rear Suspension Support Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  12. Lower the support enough to gain access to the rear stabilizer shaft insulator clamps mounting bolts.
  13. Remove the stabilizer shaft (1) from the stabilizer shaft link (2). Refer to «Stabilizer Shaft Link Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Stabilizer Shaft Link Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  14. Remove and discard the stabilizer shaft bolts (1). Replace with NEW only.
  15. Remove the stabilizer shaft assembly (4) from the support (5).

Installation Procedure

  1. Load the suspension with the proper jack stand before tightening the bolts to specifications.
  2. Install the stabilizer shaft (4) on the support (5).
  3. Install NEW clamp bolts (1) and tighten to: Tighten First Pass: 22 N.m (16 lb ft). Final Pass: plus 30 degrees.
  4. Install the stabilizer shaft (1) to stabilizer shaft link (2). Refer to «Stabilizer Shaft Link Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Stabilizer Shaft Link Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  5. Raise the rear support back into position.
  6. Install the rear support bolts (1). Refer to «Rear Suspension Support Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) , «Rear Suspension Support Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  7. Install the lower shock absorber mounting bolts. Refer to «Shock Absorber Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Shock Absorber Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  8. Install the rear brake calipers. Refer to «Rear Brake Caliper Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical-hydraulic/#disc-brake-system) .
  9. Install the rear suspension control arm bolts to the body. Refer to «Rear Suspension Control Arm Replacement»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  10. Install the rear springs. Refer to «Rear Spring, Insulator, and Jounce Bumper Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  11. Remove the adjustable jack stands from the rear support.
  12. Install the park brake cables on the trailing arms. Refer to «Parking Brake Rear Cable Replacement (J71)»(/buick/lacrosse/ii-2009-2013/remont/parking-brake-system/#parking-brake-system) .
  13. Install the rear muffler assembly. Refer to «Exhaust Muffler Replacement (Single)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) , «Exhaust Muffler Replacement (LFX)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
  14. Install the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/buick/lacrosse/ii-2009-2013/remont/wheel-tire-system/#tires-and-wheels) .
  15. Lower the vehicle.

Scheme 12

Scheme 12: Stabilizer Shaft Insulator Replacement (GNE)
Scheme 12: Stabilizer Shaft Insulator Replacement (GNE)
CalloutComponent Name
Preliminary Procedure Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Disconnect the stabilizer links from the stabilizer shaft. Refer to Stabilizer Shaft Link Replacement (GNC) , Stabilizer Shaft Link Replacement (GNE) .
1Stabilizer Shaft Insulator Fastener (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure Install NEW bolts. Tighten 22 N.m (16 lb ft) + 30 degrees
2Stabilizer Shaft Bracket Procedure Replace one insulator at a time to ensure the right position and angle.
3Stabilizer Shaft Insulator
CAUTION
Refer to Fastener Caution .

Stabilizer Shaft Insulator Replacement (GNE)

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/ii-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/lacrosse/ii-2009-2013/remont/wheel-tire-system/#tires-and-wheels) .
  3. Remove the rear muffler assembly. Refer to «Exhaust Muffler Replacement (Single)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) , «Exhaust Muffler Replacement (LFX)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
  4. Remove the rear suspension control arm bolts from the body. Refer to «Rear Suspension Control Arm Replacement»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  5. Remove the rear spring. Refer to «Rear Spring, Insulator, and Jounce Bumper Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  6. Remove the park brake cables from the trailing arms. Refer to «Parking Brake Rear Cable Replacement (J71)»(/buick/lacrosse/ii-2009-2013/remont/parking-brake-system/#parking-brake-system) .
  7. Without disconnecting the hydraulic brake hose from the caliper, remove and support the brake calliper. Refer to «Rear Brake Caliper Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical-hydraulic/#disc-brake-system) .
  8. Remove the lower shock absorber fasteners. Refer to «Shock Absorber Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Shock Absorber Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  9. Support and secure adjustable jack stands to the rear support.
  10. Mark up support position to body with spray paint.
  11. Remove the mounting bolts (1) for the support. Refer to «Rear Suspension Support Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) , «Rear Suspension Support Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  12. Lower the support enough to gain access to the rear stabilizer shaft insulator clamps mounting bolts.
  13. Remove the stabilizer shaft (1) from the stabilizer shaft link (2). Refer to «Stabilizer Shaft Link Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Stabilizer Shaft Link Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  14. Remove the bracket bolt (1), the bracket (2) and the insulator (3).
  1. Install the insulator (3), the bracket (2), on the stabilizer shaft (4).
  2. Install the NEW bolts (1) and tighten to: First Pass: 22 N.m (16 lb ft). Final Pass: plus 30 degrees.
  3. Install the stabilizer shaft (1) to stabilizer shaft link (2). Refer to «Stabilizer Shaft Link Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Stabilizer Shaft Link Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  4. Raise the rear support back into position.
  5. Install the rear support bolts (1). Refer to «Rear Suspension Support Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) , «Rear Suspension Support Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/frames-subframes-crossmembers/#frame-and-underbody) .
  6. Install the lower shock absorber mounting bolts. Refer to «Shock Absorber Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Shock Absorber Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  7. Install the rear brake callipers. Refer to «Rear Brake Caliper Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical-hydraulic/#disc-brake-system) .
  8. Install the rear suspension control arm bolts to the body. Refer to «Rear Suspension Control Arm Replacement»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  9. Install the rear springs. Refer to «Rear Spring, Insulator, and Jounce Bumper Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  10. Remove the adjustable jack stands from the rear support.
  11. Install the park brake cables on the trailing arms. Refer to «Parking Brake Rear Cable Replacement (J71)»(/buick/lacrosse/ii-2009-2013/remont/parking-brake-system/#parking-brake-system) .
  12. Install the rear muffler assembly. Refer to «Exhaust Muffler Replacement (Single)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) , «Exhaust Muffler Replacement (LFX)»(/buick/lacrosse/ii-2009-2013/remont/exhaust/#engine-exhaust-system) .
  13. Install the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/buick/lacrosse/ii-2009-2013/remont/wheel-tire-system/#tires-and-wheels) .
  14. Lower the vehicle.

Scheme 13

Scheme 13: Stabilizer Shaft Link Replacement (GNC)
Scheme 13: Stabilizer Shaft Link Replacement (GNC)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
1Stabilizer Shaft Link Nut CAUTION: Refer to Fastener Caution . Procedure Load the rear suspension with the proper jack stand before tightening the nut to specifications. Tighten 50 N.m (37 lb ft)
2Stabilizer Shaft Link Bolt Procedure Load the rear suspension with the proper jack stand before tightening the bolt to specifications. Tighten 50 N.m (37 lb ft)
3Stabilizer Shaft Link
CAUTION
Refer to Fastener Caution .

Stabilizer Shaft Link Replacement (GNC)

Scheme 14

Scheme 14: Stabilizer Shaft Link Replacement (GNE)
Scheme 14: Stabilizer Shaft Link Replacement (GNE)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
1Stabilizer Shaft Link Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 50 N.m (37 lb ft)
2Stabilizer Shaft Link
CAUTION
Refer to Fastener Caution .

Stabilizer Shaft Link Replacement (GNE)

Scheme 15

Scheme 15: Shock Absorber Replacement (GNC)
Scheme 15: Shock Absorber Replacement (GNC)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Remove the rear wheelhouse panel liner from the vehicle. Refer to Rear Wheelhouse Panel Liner Replacement .
1Rear Shock Absorber Bolts Upper Body (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure Support the lower control arm with a suitable jack stand. Tighten 100 N.m (74 lb ft)
2Rear Shock Absorber Bolt Procedure Remove and discard the bolt. Replace with NEW only. Tighten First Pass: 150 N.m (110 lb ft) plus 60 degrees
3Shock Absorber Nut CAUTION: Do Not use air tools to remove the upper shock absorber nut. Doing so could damage the shock absorber internally. Tighten 20 N.m (15 lb ft)
4Rear Shock Absorber Upper Mount Procedure Transfer the upper mount to the new shock absorber.
5Shock Absorber CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Disconnect any electrical connectors, if equipped.
CAUTION
Refer to Fastener Caution .
CAUTION
Do Not use air tools to remove the upper shock absorber nut. Doing so could damage the shock absorber internally.
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Shock Absorber Replacement (GNC)

Scheme 16

Scheme 16: Shock Absorber Replacement (GNE)
Scheme 16: Shock Absorber Replacement (GNE)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation . Remove the rear wheelhouse panel liner from the vehicle. Refer to Rear Wheelhouse Panel Liner Replacement .
1Rear Shock Absorber Bolt Upper Body (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure Disconnect any electrical connectors if equipped. Tighten 100 N.m (74 lb ft)
2Rear Shock Absorber Bolt Procedure Remove and discard the bolt. DO NOT reuse, replace with NEW only. Tighten First Pass: 150 N.m (111 lb ft) Final Pass: plus 60 degrees
3Shock Absorber CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Shock Absorber Replacement (GNE)

Shock Absorber Disposal

WARNINGGas charged shock absorbers contain high pressure gas. Do not remove the snap ring from inside the top of the tube. If the snap ring is removed, the contents of the shock absorber will come out with extreme force which may result in personal injury.
WARNINGTo prevent personal injury, wear safety glasses when centerpunching and drilling the shock absorber. Use care not to puncture the shock absorber tube with the centerpunch.
  1. Make an indentation 10 mm (0.4 in) from the bottom (4) of the tube (3) using a centerpunch.
  2. Clamp the shock absorber in a vise horizontally with the shock absorber rod (1) completely extended.
  3. Drill a hole in the shock absorber at the centerpunch (4) using a 5 mm (3/16 in) drill bit. Gas or a gas/oil mixture will exhaust when the drill bit penetrates the shock absorber. Use shop towels in order to contain the escaping oil.
  4. Make an indentation in the middle (2) of the tube (3) with a centerpunch.
  5. Drill a second hole in the shock absorber at the centerpunch (2) using a 5 mm (3/16 in) drill bit. Oil will exhaust when the drill bit penetrates the shock absorber. Use shop towels in order to contain the escaping oil.
  6. Remove the shock absorber from the vise. Hold the shock absorber over a drain pan horizontally with the holes down. Move the rod (1) in and out of the tube (3) to completely drain the oil from the shock absorber.

Scheme 17

Scheme 17: Rear Spring, Insulator, and Jounce Bumper Replacement (GNE)
Scheme 17: Rear Spring, Insulator, and Jounce Bumper Replacement (GNE)
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear tire and wheel. Refer to Tire and Wheel Removal and Installation . Remove the rear stabilizer shaft link from the rear suspension lower control arm. Refer to Stabilizer Shaft Link Replacement (GNC) , Stabilizer Shaft Link Replacement (GNE) . Disconnect the rear suspension lower control arm from the rear wheel hub bracket. Refer to Rear Wheel Hub Bracket Replacement (GNE) .
1Rear Spring Procedure Ensure that the rear spring is seated correctly in the center of the insulator as not to come in contact the lower control arm.
2Rear Spring Upper Insulator
3Rear Spring Lower Insulator

Rear Spring, Insulator, and Jounce Bumper Replacement (GNE)

Scheme 18

Scheme 18: Adjust Link Replacement (GNE)
Scheme 18: Adjust Link Replacement (GNE)
CalloutComponent Name
Preliminary Procedures Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the rear tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
1Rear Suspension Adjust Link Nut CAUTION: Refer to Fastener Caution . Procedure Support the fuel tank using a proper jack stand. Remove fuel tank strap and loosen the other fuel tank strap fastener. Lower the fuel tank to get access to rear suspension adjust link nut. Remove and discard the bolt and nut. DO NOT reuse, replace with NEW only. Tighten 150 N.m (111 lb ft)
2Rear Suspension Link Inner Bolt
3Rear Suspension Link Outer Bolt CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Remove and discard the bolt and nut. DO NOT reuse, replace with NEW only. Tighten First Pass: 150 N.m (111 lb ft) Final Pass: plus 60 degrees
4Rear Suspension Adjust Link CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Use a proper jack stand to load the knuckle when tightening the fasteners. After installation, check the rear alignment. Refer to Wheel Alignment Measurement .
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Adjust Link Replacement (GNE)

Scheme 19

Scheme 19: Adjust Link Replacement (GNC)
Scheme 19: Adjust Link Replacement (GNC)
CalloutComponent Name
Preliminary Procedure Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Rear Suspension Link Inner Nut CAUTION: Refer to Fastener Caution . CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Remove and discard the bolt and nut. Replace with NEW only. Support the adjust link horizontally with a jack before tightening the nut. Tighten First Pass: 90 (66 lb ft) Final Pass: plus 60 degrees Special Tools EN-45059 Angle Meter For equivalent regional tools, refer to Special Tools .
2Rear Suspension Washer
3Rear Suspension Link Bolt (Inner) Procedure Remove and discard the bolt. Replace with NEW only.
4Rear Suspension Link Nut (Outer)
5Rear Suspension Link Bolt (Outer) CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Procedure Remove and discard the rear suspension link bolt. Replace with NEW only. Tighten First Pass: 115 (85 lb ft) Final Pass: plus 90 degrees Special Tools EN-45059 Angle Meter For equivalent regional tools, refer to Special Tools .
6Adjust Link Procedure After installation, check the rear alignment. Refer to Wheel Alignment Measurement .
CAUTION
Refer to Fastener Caution .
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
CAUTION
This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

Adjust Link Replacement (GNC)

Wheel Stud Replacement

Special Tools

CH-49455 Ball Joint Remover

For equivalent regional tools, refer to Special Tools .

  1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/lacrosse/ii-2009-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/lacrosse/ii-2009-2013/remont/wheel-tire-system/#tires-and-wheels) .
  3. Remove the rear wheel bearing and hub. Refer to «Rear Wheel Bearing and Hub Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Rear Wheel Bearing and Hub Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  4. Use CH-49455 remover (1) to remove and discard the wheel stud.
  1. Install the NEW wheel stud into the wheel bearing hub.
  2. Add enough washers (3) in order to draw the stud into the hub.
  3. Install the wheel nut (1) with the flat side against the washers.
  4. Tighten the wheel nut (1) until the head of the wheel stud is fully seated against the back of the bearing hub flange.
  5. Remove the wheel nut (1) and the washers (3).
  6. Install the rear wheel bearing and hub. Refer to «Rear Wheel Bearing and Hub Replacement (GNC)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) , «Rear Wheel Bearing and Hub Replacement (GNE)»(/buick/lacrosse/ii-2009-2013/remont/suspension-rear/#rear-suspension-system) .
  7. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/lacrosse/ii-2009-2013/remont/wheel-tire-system/#tires-and-wheels) .
  8. Lower the vehicle.

Rear Suspension Description and Operation

The rear suspension system on this vehicle is of the independent link type. Rear suspension adjustment is achieved through adjustable toe links and lower control arms. The rear coil springs are retained between the body and the lower control arm. Rubber insulators isolate the coil spring at both top and bottom. The rear suspension consists of 2 shock absorbers attached to the knuckle and the reinforced body areas.

The rear suspension system performs the following functions

  1. Maintains the relationship of the rear axle to the body
  2. Controls the torque reaction on acceleration and braking

The suspension system consists of the following components

  1. Support assembly
  2. Coil springs and insulators
  3. Stabilizer shaft, insulators and stabilizer links
  4. Toe links
  5. Upper control arms
  6. Lower control arms
  7. Trailing arms
  8. Knuckles
  9. Wheel bearing/hub
  10. Shock absorbers

Special Tools

Illustration Tool Number/Description CH-49455 J-49455 Ball Joint Remover J 21474 Control Arm Bushing Kit

Scheme 20

Scheme 20: Special Tools
Scheme 20: Special Tools