Can't recall off the top of my head, but door chimes may be able to be muted via Programmable Parameters using an IDS. The next time you're in at the dealer ask the tech to have a quick look: Module Programming > Programmable Parameters > Personality (???).
I can check the next time I have an '09 on my rack. 50:50 shot you can shut it up.
^^^ and don't start cutting wires - nothing good will come of that. and the door switch is integrated into the latch.
2003 GMC Sierra 3500 -- dually, 4x4, hasn't blown up yet and that's what i look for in a truck
Ford Doctor -- They come in broken and leave fixed. Ford of Canada Master Tech