Vehicle Identification Number - VIN
The Buick VIN number for 1981 had 17 Characters.
1st = country code Number "1" is for USA.
2nd = Company code, "G" is for GM
3rd = What division of GM, "4" is for Buick.
4th Restraint system
5th = Tell what TYPE of car it is (Skylark, Century, Riviera, ect..)
C - Skylark Custom
H - Century Custom
J - Regal
K - Regal T-Type
L - Century
G - Century T-Type
M - Regal
P - LeSabre Custom
R - LeSabre
S - Skyhawk
E - Skyhawk T-Type
X - Electra
W - Electra Park Ave
F - Electra T-Type
V - Electra Estate Wagon
Y - Riviera T-Type
Z - Riviera
6th and 7th = Tells Body Style
11 - Electra 2dr sedan
19 - Electra 4dr
27 - 2dr coupe
35 - 4dr wagon
37 - LeSabre 2dr coupe
47 - Regal 2dr
57 - Riviera 2dr coupe
67 - 2dr Convertable
8th = Engine Code
5 - 151ci L4
X - 173ci V6 2bl carb
A - 231ci v6 2bl Carb
3 - 231ci V6 2bl carb SFI
B - 231ci v6
3 - 231 ci turbo
4 - 252ci V6 4bl carb
S - 265 v6 2bl Crab
Y - 307ci V8 4bl carb
N - Diesel 350ci V8
9th = check digit
10th = tell what year it is "B" = 1981
11th = What Plant the car was Produced
H - Flint MI
6 - Oklahoma City OK
G - Framingham MA
Z - Fremont CA
K - Leeds MO
X - Fairfax KS
E - Linden NJ
W - Willow Run MI
12th - 17th = Production Sequence numbers
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