I think Red58 is correct. When I hear Deluxe cab, I think big back window. All the trim items are an RPO of some sort I believe.
I call the extra chrome trim around the windows deluxe trim also, but it has nothing to do with a "Deluxe" package that I am aware of. It's an accessory. I also have a small window with the "Deluxe" Trim around the windows. It's exactly like the big window trim.
