Ignition/Chime

[roorancher]

For several weeks I have been having the condition where after I park the truck and remove the key I keep getting a "chime" as if the key was still in the ignition. This happens 2 different ways: Sometimes It happens immediately after removing the key with the driver's door still closed, sometimes it does not happen until I open the driver's door. Occasionally, after I exit the truck, close the door and return a few minutes later if I open the door the truck will start chiming again.

 

Yesterday, I replaced the ignition switch, because I thought for sure that little "external" switch (activated by the ignition cylinder,) attached to it was the culprit. I also started using a new key. I still have the problem,

 

I'm down to thinking it's either a worn cylinder, or something to do with the theft deterrent components attached on and around the cylinder cavity.

 

If it is a worn cylinder, can I purchase a replacement and have it coded to my key, or am I looking at new cylinder, new key and new locks in the door and tailgate?

 

Thoughts?

 

TIA