CTS 2003-2005

Wheel Bearings

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The GM W-Body models, like most Front Wheel Drive vehicles, are equipped with sealed hub and bearing assemblies. The hub and bearing cannot be separated for regreasing. If the assembly is damaged, the complete hub and bearing assembly must be replaced. Please see Section 8 for the hub and bearing removal and installation procedure.

Adjustment



The wheel bearings are not adjustable.

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    Front wheel
     
    Brake rotor
     
    ABS wheel sensor
     
    Wheel bearing mounting bolts
     
    Wheel bearing

    Click image to see an enlarged view

    Fig. Location of the bearing hub mounting bolts-Front

     

  4.  

To install:

  1. Install or connect the following:

    Wheel bearing. Tighten the bolts to 100 ft. lbs. (135 Nm).
     
    ABS wheel sensor
     
    Brake rotor
     
    Front wheel
     

  2.  

Because the outer CV-Joint is essentially a press-fit in the front hub and bearing assembly, a good-quality hub/spindle puller is recommended. Use care if using substitutes or expensive damage may result. A new service replacement drive shaft axle nut is specified as well as new hub/bearing retainer bolts. Procure the necessary parts before beginning this procedure. GM recommends the following sequence to avoid damage to the bearing.


WARNING
Use care to protect the CV-boots from damage during this procedure.

  1. Raise and safely support the vehicle.
  2.  
  3. Remove the wheel and tire assembly.
  4.  
  5. Loosen the drive shaft axle nut (sometimes called a spindle nut) one turn. The torque specification on this nut is 150 ft. lbs. (205 Nm), so expect to need a lot of torque on the wrench to break the nut loose. To keep the brake rotor and hub assembly from turning when loosening the nut, insert a suitably sized drift pin or other suitable tool through the brake caliper inspection opening into the brake rotor's ventilation openings. This should lock the assembly in place so the spindle nut can be loosened. It is good practice to wire-brush any exposed threads on the end of the spindle and apply a generous coating of penetrating oil. Do not remove the nut yet.
  6.  
  7. Remove the brake caliper, bracket and the rotor. Please see Section 9