Mike, I don't believe there would be a 2 for 2nd series. The stamp was indeed an identification number as I explained. It WAS the VIN without the "3A", "3B", etc.
1955 first series used "55" to ID the year, so when the second series trucks were produced they needed a way to tell the two series apart, so they added the "2" in front of the "55" for the second series year code. It's the only TF year to use 3 digits ahead of the plant code, the rest were just 56, 57, 58 & 59. Scroll down to page 6 on this link...
https://www.gmheritagecenter.com/do...ucks/1955-Chevrolet-Truck-2nd-Series.pdfI think we're almost saying the same thing. The frame stamped number only included the year, plant and unit number, it never had the engine, series or wheel base codes. which are all needed for the complete vehicle serial number to be used for registration or title purposes. So, yes, it's a partial identification number, just not the complete number...
Mike B
