RE: Seat Belt Alarm!! How Turn OFF? 2006 Dodge
If I remember correctly you get in the truck buckle the belt then turn the key to the run position (do not start) Then unbuckle and rebuckle the belt 3 times leaving it buckled the last time then turn the key off.
You should hear a chime if you did it right, then unbuckle the belt and you should be good to go.