I don't recall if it's possible with DMC unit, but most vehicles with traditional ignition assemblies allow you to remove the cylinder. They have release pin that you have to push in while the key is in the cylinder then rotate it to a curtain position and the cylinder comes out. But again I don't know if it's possible with DMC assembly. The key cylinder has nothing to do with the switch other than rotating it. The spring back you feel when cranking is all internal to the switch itself. Worn tumbler plates or the Key itself (OE STEEL) could cause the brass plates in the cylinder to be slightly out of position. This could cause drag when rotating though.
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