Where is the chime located

either failing seat switch or female buckle ---check wiring to both

There is no dinger as the other guy suggests . sound comes from the driver door speaker .
The audible warnings alert the driver of a system concern or a critical vehicle condition. The radio generates the audible warnings through the left front speaker. The radio receives audible warning requests via the class 2 serial data line. If the radio receives multiple audible warning requests, the warning with the highest priority sounds first. On vehicles with an audio amplifier, the amplifier instead of the radio generates the audible warnings and receives audible warnings requests via the class 2 serial data line. Either the radio or the audio amplifier is the chime producer. The following lists the audible warning priority and the pulse rate:
Fast rate chime (150 pulses per min)
Medium rate chime (100 pulses per min)
Slow rate chime (50 pulses per min)
Turn signal reminder (will pulse at turn signal flasher rate)

Your best bet ,wear your seatbelt . so the sound goes off . If you do wear the seat belt and the chime sounds ,have a qualified repair shop check it .

What make , model an year vehicle ? Most vehicles will chime for a number of reasons , just depends on year , make ,model etc.....

Is there a door ajar light on? How about a seatbelt light on? These will cause the chime to sound. Possible door switch causing issue. You can unplug the chime module from under the dash. Listen for the noise to locate it and unplug it.

Easiest way is to locate the chime and remove or snip one of the wires going to it. Voila - no more sound!

Use electric tape to cover the wire you removed.

My car does this also.It's your seatbelt alarm..It's reminding you to make sure your wearing your seatbelts.
Ellen

1. Turn the ignition switch to the off position and buckle the seat belt
2. Turn the ignition switch to run (engine does not need to be running), wait for the seat belt light to turn off.
3. Within 60 seconds, unbuckle and rebuckle the drivers seat belt at least 3 times, ending with the seat belt buckled.
4. Turn the ignition key to the off position. A single chime will sound to signify that you have successfully completed the programming.

It can be reactivated by repeating these steps.

The alert will be deactivated but the warning light will continue to stay on will the belt is unfastened.

The sensor in the seatbelt is definatly not working, Sounds like an expensive repair for just a chime,
as a joke I would find the chime and unhook it. But seriously you might be able to find the wiring under the seat for the seatbelt and unplug it depending on the year but after 20 minutes of research all seatbelt replacements ive found say they come without electronic sensor anyway.
Good luck and hope I helped you out some....
I tried my best!
Larry

sensor in the seat belt bukle needs to be replaced