Yes there is the slow chime for the door and the fast chime if you have the T63 option with lights left on and car off.
Have you checked the wiring under the seat yet?
The module is inside the inconvenience center pictured below.
I would check everything I could like the door jamb switch, seatbelt switch and wire under the seat, fuse, etc. before going after the chime module or IGN warning switch.
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