Steering Column Repair: Lock cylinder, turn signal switch, chevy lumina

Question
I have a 1993 Chevy Lumina sedan (without a console) that appears to need a new ignition lock cylinder.  When you insert the key, it turns freely and the power stays on and drains the battery.  I have pulled the steering wheel and removed the turn signal switch but am unsure of what to do next.  Do I need to remove the entire top of the column (which is held in place by a nut and washer that retain a bearing) or can I get to the cylinder from where I am at?

If you have any type of schematic to follow, that would be very helpful.

Answer
Hi,

I have some real bad news for you on this very common problem with this style column. The problem is not the ignition lock. You can replace it, but it won't fix the problem. You have a broken ignition actuator rack and possibly the sector gear on the back of the lock cylinder fell off as well.
The rod connects to a flat piece of metal that has teeth in it. The teeth match to the teeth on the sector on the back of the lock cylinder. The other end fits into the electrical ignition switch.
Here is your situation: You need someone familiar with this column to repair it. The parts are relatively cheap, but the labor can be as high as 5 hours. Taking it to a dealer is not cost efficient. This column was one of GMs mistakes and was a real nightmare to work on.
Normally, I don't suggest this, but you would be better off getting a junkyard column and be aware, this rod can break again.
As for removing the cylinder, remove the top cover. Use a needle nose to remove the key buzzer and remove the torx retaining screw and pull cylinder out. The only reason I told you this is that you may want to use you lock cylinder on the used column to keep the key the same.

Good luck!