some chevies DO NOT HAVE A FRAME NUMBER, some do,, there is a discussion of when this stopped, started etc,, you'll have to get the truck inspected, and show them the data plate, and vin number. and your BILL of sale. My k-51 chevy panel, DOES not have any frame numbers, i've looked and looked,, and do not vin the frame,, go to a different inspection station if you have to, or another BMV.. good luck,, jc