Found this on the web:
The Vehicle identification number, or VIN, decodes as follows for the C 4 Corvette.
1.........................Country of Origin 1=USA
G.......................Manufacturer G= General Motors
1.......................Division 1= Chevrolet
YY...................Carline and Series YY= Standard Corvette YZ=ZR1
3......................Body Type 3= Convertible 2=Hatchback
1......................Seat Belt Systems 1= Manual Belts
8......................Engine Code 8= L83 L98 P=LT1 5=LT4 J=LT5
9......................Check Digit
K....................Model Year SEE CHART BELOW
5.....................Factory Code 5= Bowling Green, Kentucky
The last five digits indicate the Plant sequential Build Numbers
Symbol E........................1984 Symbol L ............................1990
Symbol F.........................1985 Symbol M............................1991
Symbol G.........................1986 Symbol N............................1992
Symbol H.........................1987 Symbol O................Not Used
Symbol I..........................Not Used Symbol P 1993
Symbol J..........................1988 Symbol R.............................1994
Symbol K.........................1989 Symbol S...............................1995
Symbol L..........................1990 Symbol T.................................1996
The last five numbers are the car's position in the build sequence for the model year.