1992 Chevy Silverado upper and lower balljoints

Very carefully as you have torsion bars. I will post the diagram shortly.

Upper Ball Joint Replacement

IMPORTANT: Raise the vehicle and support it with suitable safety stands.

Hub, Knuckle, And Control Arm Components

Installing The Upper Ball Joint

REMOVE OR DISCONNECT

Tire and wheel.
Rivets from the ball joint (115).
Brake hose and bracket (142), upper control arm only.
Drilling The Upper Ball Joint Rivets

Use a 3.175 mm (1/8-inch) drill to cut a 6.35 mm (1/4-inch) deep hole in the center of each rivet.
Drilling The Upper Ball Joint Heads

Drill the rivet heads away using a 12.7 mm (1/2-inch) drill.
Removing The Upper Ball Joint Rivets

Using a pin punch remove the rivets.
Pin (130).
Nut (129).
Ball joint (115) from the knuckle (117). Support the knuckle.
Ball joint (115).
Hub, Knuckle, And Control Arm Components

Installing The Upper Ball Joint

INSTALL OR CONNECT

Ball joint (115) to the control arm.
Bolts (B) and nuts (A) to the ball joint. Tighten nuts (A) to 23 Nm (17 lbs. Ft.) For K1-2, and to 70 Nm (52 ft. Lbs.) For K3
Ball joints (115) to the knuckle (117).
Nut (129). Tighten nut (129) to 115 Nm (84 lbs. Ft.).
Nut (129) must be tightened with the control arm at 'Z" Height.
Tighten the nut to align the cotter pin. Do not tighten more than 1/6 turn.
New pin (130).
Bend the pin ends against the nut.
Lower the vehicle.
Check front end alignment.

Im having trouble posting images on this. Maybe someone else has a program where they can cut/paste images.

Ive tried several times to post the diagrams. All I ask, is dont attempt this job without 1st reading how to properly do the job. You can get seriously injured, or killed. This is a job that can be done at home, I suggest buying a haynes manual to further instruct you. Keep in mind you need a grinder, an air hammer is always nice, and a heavy duty set of jack stands in order to tackle this job.

TOOLS REQUIRED
J 24319-01 Steering Linkage Puller
J 36202 Torsion Bar Unloading Tool
J 29193 Steering Linkage Installer

IMPORTANT: Raise the vehicle and support it with suitable safety stands.

Hub, Knuckle, And Control Arm Components

REMOVE OR DISCONNECT

Tire and wheel.
Removing Or Installing The Torsion Bar Adjusting Bolt

Unload the torsion bar using tool J 36202. Mark the adjuster bolt for reinstallation of the torsion bar.
Brake hose bracket.
Caliper and wire oft to the side.
Drive Axle Cover Installed

Install the drive axle boot cover.
Outer tie rod end (125) from the knuckle using J24319-01.
Drive axle shaft nut (120) and washer (119) from the hub assembly.
Separate the shaft (132) from the splined hub (114).
Cotter pins (130) from upper and lower ball joint nuts.
Support the lower control arm assembly (93) with a jack.
Upper and lower ball joint nuts (129 and 131).
Separate the upper ball joint (115) from the knuckle (117) using J 36607.
Separate the lower ball joint (127) from the knuckle (117) using J 24319-01.
Using the support jack, remove the knuckle assembly.
Rivets
Center punch the bottom of the rivets.
Using a 3.175 mm (1/8-inch) drill bit, drill a guide hole 6.35 mm (1/4-inch) into the center of each rivet heads.
Using an 12.7 mm (1/2-inch) drill bit, drill the rivet head off.
Drill a hole two-thirds the length of the rivet shank, using a 8 mm (5/16-inch) drill.
Using an 8 mm (5/16-inch) pin punch, punch out the rivets.
TOOL REQUIRED:
J 36202 Torsion Bar Unloading Tool

INSTALL OR CONNECT

Ball joint (127) to the control arm.
Installing The Lower Ball Joint (Riveted / Bolted)

Bolts (137) and nuts (136) to the ball joint (127)
Tighten nuts (136) to 60 Nm (45 lbs. Ft.).
Raise lower control arm with the hydraulic jack.
Knuckle to the upper ball joint.
Nut (131)
TIGHTEN

Nut to 128 Nm (94 ft. Lbs.)
Nut must be tightened with the control arm at the "Z" height.
Tighten the nut to align the cotter pin. Do not tighten more than 1/6 turn.
New cotter pin (130).
Bend the pin ends against the nut.
Load the torsion bar, using J 36202.
Set the adjuster bolt at the mark made during disassembly.
Drive axle assembly (121) to the differential output shaft.
Bolts (135). Tighten bolts to 78 Nm (57 lbs. Ft.).
Prelube steering knuckle seal.
Drive axle to the hub (114).
Washer (119 and nut (120). Tighten nut to 235 Nm (173 lbs. Ft.).
Inner tie rod end to the relay rod.
Inner tie rod end nut. Tighten nut to 47 Nm (35 lbs. Ft.).
Front splash shield.
Front splash shield bolts.
Tire and wheel.
Wheel nuts.
Lower the vehicle.
Check the front end alignment.