Door Lock Issue

[Bill Pritchard]

I have a door lock cylinder on the drivers door that the key goes about half way in and just stops. I have removed it from the car and had sprayed a bunch of graphited lock fluid in and let it sit for several days....no improvement. The corresponding lock on the passenger door works just fine with the key, and both cylinders have the same code number. My Fisher Body manual says in order to access the workings of the lock cylinder (tumblers, etc.) one must remove the "scalp" but there is no corresponding picture or diagram. I am guessing the "scalp" is the stainless covering that is visible on the outside of the car when the lock cylinder is installed. It also says that the scalp is normally destroyed in the process, but service replacements are available(!?) Anyone have any experience or advice in this regard?