If you have the 4 post FICM (remove little cover on top below are 4 or 7 screws). Check the voltage on the screw closest to the fender and ground if less than 45 volts engine running you most likely can repair it yourself and no reprogramming needed (dont touch probe from screw to the case).
Remove FICM from truck. Remove the following; small cover on top of ficm, 4 screws that are under cover, 6 screw on other side holding case together. Split case. Re solder places circled in pics. Put back together and check volts.
http://s202.photobucket.com/albums/aa236/DrQuad/FICM/