Lower Control Arm Replacement (GNA)

2013 Buick Regal Turbo Premium, Standard TransSECTION Lower Control Arm Replacement (GNA)
Fig 1: Lower Control Arm & Components (GNA)
GM2274013Courtesy of GENERAL MOTORS COMPANY
Lower Control Arm Replacement (GNA)

Callout Component Name

Preliminary Procedures

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
1 Steering Knuckle Nut
CAUTION:

Refer to Fastener Caution .

Procedure

  1. Support the knuckle with the proper jack stand.
  2. Using a suitable tool, open the pinch joint on the steering knuckle and disconnect the lower control arm ball joint from the knuckle.

Tighten 
  1. Tighten the nut to 50 N.m (37 lb ft).
  2. Loosen the nut to 120 degrees.
  3. Tighten the nut to 50 N.m (37 lb ft) + 45 degrees.
2 Steering Knuckle 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 
Discard the bolt. DO NOT re-use, replace with NEW.
3 Front Lower Control Arm Front Nut
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 
Discard the nut. DO NOT re-use, replace with NEW.
4 Front Lower Control Arm Front 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 
Discard the bolt. DO NOT re-use, replace with NEW.
Tighten 
100 N.m (74 lb ft) + 90 degrees
5 Front Lower Control Arm Rear Nut (Qty: 2)
6 Front Lower Control Arm Rear Bolt (Qty: 2)
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 
Discard the bolt. DO NOT re-use, replace with NEW.
Tighten 
100 N.m (74 lb ft) + 90 degrees
7 Front Lower Control Arm Rear Bushing 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

  1. Discard the bolt. DO NOT re-use, replace with NEW.
  2. Load the front suspension with the proper jackstand before tightening the bolt to specification.
  3. Use the GE-6600-2  wrench to tighten the NEW bolt to specification.

Tighten 
55 N.m (41 lb ft) + 100 degrees
Special Tools 
GE-6600-2  Torque Wrench
For equivalent regional tools. Refer to Special Tools .
8 Front Lower Control Arm
Procedure 
Verify the wheel alignment. Refer to Wheel Alignment Specifications .
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.