The first step to replace the Steering Shaft upper bearing is to remove the Steering Column. Start by removing the inflatable restraint steering wheel module coil and then proceed to remove the turn signal multifunction switch and ignition lock cylinder case. Crossover the tilt spring while simultaneously removing the automatic transmission control. Before shaft repair proceed with compressor (J 23653-SIR) and adapter (J 42137) to eliminate and dispose of the Steering Shaft lock plate retaining ring. Extract the Steering Column shaft assembly components of Turn Signal Switch cancel cam position plate, Turn Signal Switch cancel cam, steering shaft upper bearing spring, steering shaft upper bearing inner race seat, and Steering Shaft upper bearing inner race. Use remover (J 21854-01) to remove the 2 pivot pins that are found in the Steering Column tilt head assembly. Pull the tilt lever into the Steering Column tilt head assembly before pulling back on the tilt lever to pull the Steering Column tilt head assembly down and away from the Steering Column. Remove the anti-rotation pin (J 42640) and the tilt lever before you pull the Steering Shaft upper bearing from the Steering Column tilt head assembly. Insert the Steering Shaft upper bearing into the Steering Column tilt head assembly after which you should install the Steering Column shaft assembly. The Steering Column tilt head assembly should be maneuvered and pushed to the Steering Column direction which locks the steering wheel lock shoes into position. Place gm p/n 12346293 (Canadian P/N 992723) lubrication onto each pivot pin and firmly insert these pins into the Steering Column tilt head assembly while performing 3 stake points on the Steering Column. Install anti-rotation pin (J 42640) along with the following components onto the Steering Column shaft assembly. First lubricate the Steering Shaft upper bearing inner race with gm p/n 12345718 (Canadian P/N 10953516) before installing the Steering Shaft upper bearing inner race and Steering Shaft upper bearing inner race seat along with Steering Shaft upper bearing spring. Then lubricate the Turn Signal Switch cancel cam with gm p/n 12377900 (Canadian P/N 10953529) before installing the Turn Signal Switch cancel cam and Turn Signal Switch cancel cam position plate. Install the new Steering Shaft lock plate retaining ring onto the Steering Shaft by using compressor (J 23653-SIR) and adapter (J 42137) followed by automatic transmission control assembly then tilt spring and ignition lock cylinder case and turn signal multifunction switch and inflatable restraint steering wheel module coil and Steering Column.