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
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.