If you're not comfortable with this level of repair, take your truck to a qualified mechanic.
However, if you're determined to do it yourself, here's a general overview of the process. This is NOT a comprehensive guide and should not be considered a substitute for a proper repair manual specific to your vehicle's year, make, and model. You'll need a detailed repair manual for specific torque specifications and other crucial information.
Tools and Supplies You'll Likely Need:
* Jack and jack stands: Essential for safely lifting the truck.
* Wheel chocks: For safety.
* Lug wrench: To remove the wheel.
* Ball joint press: This is crucial for safely removing and installing the ball joints without damaging them. A cheap one will likely damage the components.
* Hammer and punches: May be needed for stubborn components (use carefully!).
* Socket set and wrenches: Various sizes will be required.
* Torque wrench: Absolutely essential for tightening bolts to the correct specification.
* Penetrating oil (PB Blaster, etc.): To help loosen rusted or seized components.
* New ball joints: Get the correct ones for your truck.
* Grease: For lubricating the new ball joints.
* Repair manual: Specific to your 1996 Chevy 4x4.
General Steps (Highly Simplified):
1. Safety First: Engage the parking brake, chock the wheels, and use jack stands properly. Never work under a vehicle supported only by a jack.
2. Remove the Wheel and Tire: Remove the lug nuts and take off the wheel.
3. Disconnect the Steering Linkage: Disconnect the tie rod end from the knuckle. You'll likely need a tie rod separator tool.
4. Disconnect the Brake Caliper: Unbolt and secure the brake caliper out of the way. Support it to avoid straining the brake line.
5. Remove the cotter pin and castle nut from the ball joint: This releases the upper ball joint.
6. Separate the Ball Joint: Use a ball joint separator or press to separate the ball joint from the knuckle. This is often the most challenging part.
7. Remove the lower ball joint: This often involves removing the lower control arm. You'll need to consult your repair manual for specific procedures on your truck, as methods vary.
8. Install the new ball joint: Using the press, carefully install the new ball joint into the knuckle and control arm.
9. Reassemble everything: Reinstall the components in reverse order of removal, ensuring everything is properly tightened to the specifications in your repair manual. Pay close attention to the torque settings.
10. Check your work: After reassembly, double-check all connections and torque specifications.
11. Alignment: After replacing ball joints, you must have a wheel alignment performed by a professional.
Again, this is a highly simplified overview. A detailed repair manual specific to your 1996 Chevy 4x4 is absolutely necessary. Improper installation can lead to serious safety issues and damage to your vehicle. If you're not comfortable with this repair, please take your truck to a qualified mechanic.