You may have to cut some wires.  A Haynes manual will show you a wiring diagram which should make it easier to find the chime unit and disconnect it.  These are typically removable from the older vehicles -- you have posted twice, once as a 1994 and once as a 2004, which are vastly different.  You may also want to try getting a factory shop manual on Ebay, which will tell you how to do this also.