Disassembly Procedure

Rotate the stub shaft back and forth in order to drain the power steering fluid.
Remove the coupling shield retainer and the lock nut from the steering gear housing using J 43435 and a torque wrench.

Fig 1: Removing Coupling Shield Retainer & Lock Nut Using J 43435 & Torque Wrench
Courtesy of GENERAL MOTORS CORP.
Remove the adjuster nut assembly (2) from the steering gear housing (1) using J 42882 .

Fig 2: Removing Adjuster Nut Assembly Using J 42882
Courtesy of GENERAL MOTORS CORP.
Remove the thrust support assembly (2) from the steering gear housing (1).
Remove the O-ring seal (3) from the thrust support assembly (2).

Fig 3: Removing Thrust Support Assembly & O-Ring Seal
Courtesy of GENERAL MOTORS CORP.