I think with some re drilling the driver's side rails from any sierra will fit any other (leaf) sierra. Nothing fits a doily.

I would say if you have sliders (i.e not fixed ute seats) then they will swap over. The passenger side won't - the front two bolts will line up, but new rear holes will need to be drilled to fit the hinge style 1.0 passenger side seat to a 1.3 floor.
Steve.