[Rustedwrench]

This assumes you are replacing the female buckle and not the belt and retractor assembly. Service info states to remove the driver's seat because the electrical harnesses and connectors for the seat belts and air bags secured to the bottom of the seat. Whether you can release the connectors with the seat in place I do not know. The connector for the seat belt buckle is gray in color and has three wires.

The seat trim on the right side must be removed as well. The battery should be disconnected prior to any work being done. Before going to all the trouble I would connect the used buckle you wish to use and see if it corrects the problem.