yeah you just have to find it then smash it with a BFH
unless there is a wire going to it then just cut it
i would say pull the fuse but i know it runs other things as well
i tried doing that in my dads 02 super crew. The fuse that does the door chimer and seatbelt chimer is also connected to the transmission over-drive somehow.
Many years ago a friend of mine worked at ford and when he needed to leave the door open he would find the buzzer and squeeze it together with pliers to shut it up then when finished
squeeze it the other way and back to buzzing. If you can find it this might work.