Here's a general outline. Specific steps may vary slightly depending on your exact model and whether it has ABS. Always consult a repair manual specific to your vehicle year and model for detailed instructions and torque specifications. A Haynes or Chilton manual is a good investment.
Tools You'll Likely Need:
* Jack and jack stands
* Wheel chocks
* Lug wrench
* Socket wrench set (metric)
* Torque wrench
* Ball joint separator (pickle fork or ball joint press is preferred)
* Hammer
* Penetrating oil (like PB Blaster)
* Pry bar
* Axle nut socket (usually large)
* Possibly a caliper piston compressor (if replacing calipers)
* Possibly a cotter pin remover
Steps (General Outline):
1. Safety First: Secure the vehicle on jack stands. Chock the rear wheels. Engage the parking brake.
2. Remove the Wheel: Remove the wheel using your lug wrench.
3. Remove the Brake Caliper:
* Use a socket wrench to loosen the caliper mounting bolts.
* Carefully support the caliper with a bungee cord or wire to prevent it from hanging by the brake line. Do not let the brake line hang or stretch.
* Remove the caliper and set it aside. You may need to compress the caliper piston if it's difficult to remove.
4. Remove the Rotor: The rotor might be held on by a single bolt (some models) or simply slide off after the caliper is removed (more common). Clean the rotor mounting surface.
5. Disconnect the ABS Sensor (If Equipped): If your LeSabre has ABS, you'll need to carefully disconnect the ABS sensor wire from the hub assembly. This usually involves unplugging a connector.
6. Remove the Cotter Pin and Castle Nut: Locate the large axle nut on the end of the axle shaft. Remove the cotter pin and then carefully unscrew the axle nut. Use penetrating oil if it's stuck.
7. Separate the Ball Joint: This is often the hardest part. You'll need to separate the lower ball joint from the control arm. A ball joint separator (pickle fork) is commonly used, but a ball joint press is much safer and less likely to damage components. Apply penetrating oil liberally beforehand.
8. Remove the Hub Assembly: With the ball joint separated and the axle nut removed, the hub assembly should be able to be pulled off the spindle. It might require some gentle persuasion with a pry bar, but avoid excessive force to prevent damage.
9. Installation: Installation is the reverse of removal. Remember to torque all bolts and nuts to the manufacturer's specifications. Pay particular attention to the axle nut.
Important Considerations:
* ABS Sensor: Be extremely careful with the ABS sensor. Damage to it can lead to costly repairs.
* Torque Specifications: Use a torque wrench and consult your repair manual for the proper torque specifications for all bolts and nuts. Improper torque can lead to premature wear or failure.
* Parts Replacement: Consider replacing worn parts like the wheel bearings, seals, and ABS sensor while you have the hub assembly off.
This is a simplified overview. Again, consult a repair manual specific to your 2001 Buick LeSabre for detailed instructions and safety precautions. If you are not comfortable performing this repair, it's best to take your vehicle to a qualified mechanic. Improper repair can lead to serious safety hazards.
