The NCS is an easier one, because they do not have the Steering Column Module underneath the combination switches.
Disconnect the battery.
Slide the steering column all the way out towards the driver, and down.
Unclip the airbag, and carefully unplug it and remove it.
Remove the steering wheel... there is a punch mark on the splines underneath the bolt, make note of it.... and take the wheel off while the wheels are in the straight ahead position.
Do NOT bump or move the clock spring, there will be two tabs at 3 and 9, connector at the top. Make sure it stays that way.
Pop the upper clamshell cover off the column, starting at the joint that was covered by the steering wheel, pop it up and I tape it up out of the way on top of the dash board or pop it off the bottom of the cluster completely (there are different versions).
Remove three Torx screws... two at the top beneath the edge of the upper cover you just removed, one down low in a slot near the column adjustment lever. You'll need the key out to remove this lower cover, be sure the grommet around the key hole stays put (if your car is cursed with the push button start, you won't have that).
Depending on which version, the clock spring can be clipped on, or sometimes a small Torx screw is used in addition to the clips. Unplug the electrical connectors in the bottom... again, depending on equipment you may have one or two connectors (steering wheel controls).
Carefully remove the clock spring... DO NOT turn it! Set it aside (I always place it up on the middle of the dash out of the way).
Unplug the switches, there will be between three and four connectors. They do not all go in at the same angle.
You can leave the wire connector on the transponder ring around the lock cylinder in place for now if you cannot get it to come unplugged and go under the bracket, just pop the stay on that wire loose further in on the metal column frame to give it some slack for later.
Using a sharp center punch and a hammer, loosen the two breakaway screws from the switch/frame assembly that bolts it all to the column. They typically come loose easily, and you can spin them around and out with that punch.
Slide the assembly off, you'll have to unlock the steering lock pawl with the key. Then you'll be able to unplug and fish the wire out from the transponder ring connector if you were not able to do so before.
Now you have to unclip the plastic switch frame from the housing, two little tabs and it slides apart. Study it for a minute before you try prying on anything, once you see how it is assembled, it's pretty simple but at first it looks like a puzzle.
.... this all assumed that your existing key still works and turns and comes out of the cylinder. If it does NOT, then you may need some strategic wiggling, cursing, cutting, just depends...
To put the new cylinder in the new housing: you only get one chance, as it is a double catch inside. You use a paperclip bent straight or something similar in the little hole in the cylinder to hold the little curved lock tang in while you slide the cylinder into the housing until it seats... make sure the little twisty tab is lined up correctly (do NOT mess with the housing!!!) Slide the paper clip and and work the key back to make sure it all works correctly.
Then reverse procedure to put it back together, I use 5mm Allen pan head screws in place of those stupid breakaway bolts, locally available (I get mine from Fastenall). They needn't be crazy tight.
