Tools You'll Likely Need:
* Jack and jack stands: Essential for lifting the vehicle safely.
* Wheel chocks: For added safety.
* Lug wrench: To remove the wheel.
* Torque wrench: Absolutely critical for proper tightening of bolts and nuts. Incorrect torque can lead to damage.
* Sockets and ratchets: Various sizes depending on your Blazer's specific hardware.
* Hammer and punch (possibly): May be needed to help break loose stubborn parts.
* Ball joint separator (possibly): To separate the ball joint from the control arm (depending on the design of your Blazer).
* C-clamp (possibly): May be used with a ball joint separator.
* Penetrating oil (like PB Blaster): Helpful for loosening rusted or seized bolts.
* Clean rags: To keep things clean.
* New wheel hub assembly: Obviously.
* New cotter pin: For the castle nut.
* New ABS sensor (if applicable): The ABS sensor may be integrated into the hub assembly, or you may need to transfer it carefully. Check this *before* you begin.
General Steps:
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks on the wheels that remain on the ground. Raise the vehicle safely using a jack and support it securely with jack stands.
2. Remove the Wheel: Remove the lug nuts and carefully remove the wheel.
3. Disconnect Brake Caliper: Remove the brake caliper, usually by loosening the caliper mounting bolts. Support the caliper with a bungee cord or wire to prevent it from hanging by the brake line.
4. Disconnect ABS Sensor (if separate): If the ABS sensor is not integrated into the hub assembly, carefully disconnect the sensor wire connector.
5. Disconnect Ball Joint: This is often the most difficult step. You may need a ball joint separator to separate the ball joint from the control arm. Be very careful not to damage the ball joint or boot. Some designs may require removal of the lower control arm. Refer to your repair manual for specific instructions.
6. Remove Axle Nut and Hub Assembly: Remove the large axle nut (often a castle nut). You may need to hold the rotor with a wrench to prevent it from turning while removing the nut. Once the nut is off, the hub assembly should come off. If it's stuck, you may need to gently tap it with a hammer and punch.
7. Install New Hub Assembly: Carefully install the new hub assembly, making sure everything lines up correctly. Ensure that the ABS sensor (if integrated) is properly seated.
8. Reassemble: Reinstall the axle nut, tightening it to the specifications in your repair manual using a torque wrench. Install the cotter pin to secure the nut. Reattach the ball joint, brake caliper, and ABS sensor (if applicable).
9. Install Wheel: Install the wheel and tighten the lug nuts to the correct torque specification.
10. Lower Vehicle: Carefully lower the vehicle and remove the jack stands. Double-check that all lug nuts are properly tightened.
11. Test Drive: After installation, test drive the vehicle to ensure everything functions correctly. Listen for any unusual noises.
Important Considerations:
* Repair Manual: A repair manual specific to your Blazer's year and model is essential. Generic instructions are not a substitute for proper guidance.
* Torque Specifications: Use a torque wrench and adhere strictly to the manufacturer's torque specifications for all fasteners. Incorrect torque can lead to serious safety hazards.
* ABS Sensor: Be extremely careful with the ABS sensor. Damaging it can lead to ABS malfunction.
* Professional Help: If you are not comfortable performing this repair, it's always best to seek the assistance of a qualified mechanic. This is not a beginner's job.
This information is for guidance only. Always consult your vehicle's repair manual for specific instructions and torque specifications. Incorrect installation can lead to serious safety issues.
