what can i do to disable the remote unlocking system?

 

Reprogram with the new remote(s) and all others will be erased from the system.

 

ok. what about the key. the key will get them into my car and let them drive away with it. i want to alter the ignition system to prevent this. (1995 s10 blazer )

 

I think you'd need a new tumbler for that. The part is on rockauto. Comes with a new key. But then you'd have mismatched keys for the doors and ign...so you'd have to replace the lock cylinders on the doors.

Edit: Just realized you've got a 95. New key tumbler and key is only $15 on rockauto.