I have a 2006 Buick Terazza. My passenger automatic sliding door has not work on and off for about 2 years now. Finally got it to shut and then told no one to use it. But someone made that mistake and I had to manually shut it again, but the chime will not turn off this time around. It is so irritating. I then realized the chime was on "loud" and not average (from reading the auto manual) and got it turned down to average which helped a ton with the noise factor.
The bottom line - took it to the dealer to address an ABS light on all the time - and at that time I asked them to unplug the automatic door motor (which also controls the chime) and problem solved - no more annoying chime. I have no problem closing the doors manually.