But if seat belts are connected and still this chime is troubling you,then yes you can easily disable seat belt chime or warning which indicates/ triggers on dash , that tells you to apply seat belts.-------
There are two wires going to the drivers side seat belt buckle. The wire colors are Tan and Blue. Connect these two wires together and this will disable the warning chime.
Unplug the connector and connect the two wires together. If you want to disable the front passenger seat, you will have to repeat the procedure for that seat as well. If you go under the seat from the rear, you should be able to see the wiring connector that goes up into the buckle.