VIN Breakdown

First Digit: 
1 - U.S. Built
2 - Canadian Built
3 - Mexican Built


Second Digit:
G - General Motors


Third Digit:
A - Chevy Bus, van with 4 seats
B - Chevy Incomplete
C - Chevy Truck
D - GMC Incomplete
J - GMC Bus
K - GMC MPV
N - Chevy MPV
T - GMC Truck


4th Digit: GVWR/Brake System
B - 3001-4000 Hydraulic
C - 4001-5000 Hydraulic
D - 5001-6000 Hydraulic
E - 6001-7000 Hydraulic
F - 7001-8000 Hydraulic
G - 8001-9000 Hydraulic
H - 9001-10000 Hydraulic
J - 10001-14000 Hydraulic
K - 14001-16000 Hydraulic


5th Digit: Line/Chassis Type
C - Conventional Cab/4x2
R - Conventional Cab/4x2
D - Military Truck/4x4
K - Conventional Cab/4x4
V - Conventional Cab/4x2
G - Van/4x2
P - Forward Control/4x2
S - Sm Conventional Cab/4x2
T - Sm Conventional Cab/4x4
M - Sm Van/4x2
L - Sm Van/4x4
H - Chassis Cutaway/4x2


6th Digit:
1 - 1/2 Ton
2 - 3/4 Ton
3 - 1 Ton


7th Digit:
0 - Chassis Only
1 - Hi-Cube/Cutaway Van
2 - Forward Control
3 - Four-Door Cab
4 - Two-Door Cab
5 - Van
6 - Suburban
7 - Motor Home Chassis
8 - Utility (Blazer/Jimmy)
9 - Extended Cab


8th Digit: Engine Type and Make
Code Producer Type RPO
B CPC 4.3L V6 TBI LU2
C CPC 6.2L V8 DIESEL LH6
E CPC-NORTH 2.5L L4 TBI LN8
H CPC 5.0L V8 TBI LO3
J CPC 6.2L V8 DIESEL LL4
K CPC 5.7L V8 TBI LO5
M CPC 5.7L V8 4 BBL LT9
N CPC 7.4L V8 TBI L19
P CUMMINS 3.9L DIESEL LST
R CPC 2.8L V6 TBI LL2
T       CPC 4.8L L6 1 BBL L25
W CPC 7.4L V8 4 BBL LE8
Z CPC 4.3L V6 TBI LB4


9th Digit: Check Digit
No Description


10th Digit: Year
L - 1990
no other listings


11th Digit: Assembly Plant
B - Baltimore, MD
E - Pontiac East, MI
F - Flint, MI
J - Janesville, WI
S - St. Louis, MO
V - Pontiac, MI
Z - Fort Wayne, IN
O - Pontiac, MI
1 - Oshawa, ON
2 - Moraine, OH
3 - Detroit, MI
4 - Scarborough, ON
5 - London, ON
7 - Lordstown, OH
8 - Shreveport, LA


The remaining 6 digits are the Production Sequence Number, I have no
idea how this breaks down, if someone can figure it out let me know.