Truck chimes don't stop. Hear a set of 5 chimes in a series, repeated 4 times.

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Truck chimes don't stop. Hear a set of 5 chimes in a series, repeated 4 times. This happens when we start the truck. Then stops. Randomly repeats same sequences every 20 minutes or hour...No door ajax light and seat belts are tied. No other indicater light/warning on the dash.