Buick put this module as a plug in at what they call the "Convenience Center", which is anything but convenient. It sits under the dash, between the radio and the steering column, but (unfortunately) all the way back, nearest the dash plate. This makes it just barely accessible if you stand on your head with the seat bottom breaking your back. Or you can remove your radio and reach around, but access is still very tight. Although the chime module plugs in, it has the typical GM locking tabs that your fingers have to find before pulling out the module. It's a major PITA, and you just reminded me that I have to replace mine with the junkyard module I pulled last week.