If memory serves me correctly, you get in driver's seat and buckle the belt with the motor off. Then turn the key to 'on', but don't start the engine. With the key 'on', you unbuckle and re-buckle the belt 3 times within 10 seconds, leaving the belt buckled. then turn the key off. When you go to start the engine, there should be a chime that indicates you've disabled the belt chime. The red seat belt light will always be on though, unless the belt is buckled.