The solution is easy. There is a little button that you press on the body of the switch that releases the 'shaft and knob'. A little jiggling is required sometimes.
The Buick Roadmaster was not produced in 1986. They were made from 1991 to 1996.
Remove retaining nut
A 1992 Buick does not have an inertia or fuel cut off switch.
It is not equipped with an inertia switch.
buick roadmaster 1992 rear axle does it have limited slip diff
fuel pump keeps running after the key is out what do I need to check I have to remove the fuses to stop the pump.
drop the gas tank
Replace ignition switch for 1993 buick century?
very carefully!
Ignition CoilEngine LH Side Upper
Low freon
How to install a waterpump on a 92 Buick road master