The vin is located on the driver side door jam or in right side fire wall in a aluminiom plate on that truck it has like 4 to 8 numbers good luck
Where Is The VIN Located On 1951 Chevy Truck 3100?
Drivers side door frame on hinge side
Vin numbers are always located in the front windshield corner on the drivers side. However, I have seen some also on the inside of the door on a sticker of some vehicles not sure why they put it there too on some. If you don't find it and get a better answer here I would try calling a Chevy Dealer they should be able to tell you and give you better information. Good luck.