How to decode your vin number:
1st digit = Nation of Origin
-- 1 = USA
2nd digit = company
-- G = General Motors
3rd digit = division
-- B = Chevrolet, incomplete example contract maintenance trucks
-- C = Chevy Truck
-- 8 = Multipurpose Vehicle All M1009's (blazers)
4th digit = GVWR/Brake System
-- E = 6001 - 7000 Hydraulic
-- F = 7001 - 8000
-- G = 8001 - 9000
-- H = 9001 - 10000
5th digit = Line Description & Chassis Type
-- C = 2 Wheel Drive 1981-86
-- K = 4 Wheel Drive 1981-86
-- D = military 4/4
6th digit = Series
-- 1 = 1/2 ton
-- 2 = 3/4 ton
-- 3 = 1 ton
7th digit = Body Type
-- 4 = 2 Door Cab
-- 8 = Blazer
8th digit = Engine Description
-- J = 6.2L V8 Diesel
9th digit = character is a check digit to verify VIN accuracy using a mathematical formula
10th digit = Model Year
-- B = 1981 F = 1985
-- C = 1982 G = 1986
-- D = 1983 H = 1987
-- E = 1984
11th digit = assembly plant
-- F = Flint