Can anyone help me in the decoding of a VIN? I need to know about a 57 GMC p/u. The VIN is as follows. 102PY18623. I work for a company that owns this vehicle and is trying to sell it. It was purchased in good faith as a 1957 Suburban carrier with the optional 347 Pontiac V8 and the 3 speed Hydromatic transmission. I would like to make sure that the truck is properly represented.