Why do my alarm keep going off when I take the key out?

Hello, Just to check on the status of the alarm, have you tried locking and unlocking the drivers door manually with the key? I'm really not sure why it is arming the second you take your key out, and this will need a diagnostic scanner connected to inspect and test the alarm. Let me know what questions you have, and here is a link in case you prefer to have it diagnosed: http://repairpal.com/buick-within-10-miles-of-bloomington-illinois-61704