A sample 1984 El Camino VIN would look like this: 1GCCW809XER100001
1st digit - This is the Country of origin
1 = U.S.A
2 = Canada
3 = Mexico
2nd digit – This is the manufacturers identity
G = General Motors
3rd digit - This is the Make
C = Chevrolet Truck
T = GMC Truck
4th digit - This is the GVWR Brake System
C = Hydraulic brake system - GVW 4001-5000
5th digit - This is the Series
W = El Camino/Caballero
6th and 7th digits - This is the Body Style
80 = 2dr Sedan Pick-up
8th digit - This identifies the engine
9 = V-6, 229cid
A = V-6, 231cid
H = V-8, 305cid
N = V-8, 350cid diesel
9th digit -Check Digit
10th digit - This is the Model Year
E = 1984
11th digit - This is the Assembly Plant code
B = Baltimore, MD
D = Doraville, GA
R = Arlington, TX
Z = Fremont, CA
1 = Oshawa, Canada
12th through 17th digits – Sequential Production Number
100001 – Sequential Production Number
hope that helps i found it on a el camino forum
http://www.elcaminocentral.com/showthread.php?t=27738