seat belt chimes when buckled

2009 malibu - the drivers seat belt warning chimes and the light illuminates while driving, (yes the belt is connected). It continually comes on and cycles about every 3-5 minutes. I can disconnect the belt and the chime and light will not come on. It just contines to cycle thru the warning process every 3-5 minutes reguardless if the belt is connected or not.

This car is still under warrenty but if it was simple, id rather do it myself and not mess with the dealer.

Any ideas??