I have seen frame markings, but I have not seen Chevrolet documentation for frame markings. Some states and some organizations marked the frames. It would be nice to see Chevrolet documentation. It seems to me that if the frame was regularly marked at the factory, the manufacturer would document that.

http://www.1954advance-design.com/chev-specs/1956-t-ser.pdf

http://www.1954advance-design.com/chev-specs/1958-t-ser.pdf

Those of you who have a frame ID, does it match the vehicle/cab ID or the engine ID?