Vehicle Identification Number - VIN
The Buick VIN number for 1990 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 = Tell what TYPE of car it is (Skylark, Century, Riviera, ect..)
"A" = Century
"B" = LeSabre and Electra Estate Wagon
"C" = Electra
"E" = Riviera and Reatta
"H" = LeSabre
"N" = Skylark
"W" = Regal
5th Series type
B - Regal Custom
C - Skylark Custom - Reatta
D - Skylark Limited Regal Limited
F - Electra T-type
H - Century Custom
J - Skylark Custom
L - Century Limited - Estate Wagon
M - Skylark Limited
P - LeSabre Custom
R - LeSabre Limited - Estate Wagon
U - Electra Ultra
V - Electra Estate Wagon
W - Electra Park Avenue
Z - Riviera
6th = Tells Body Style
"1" = 2dr Coupe
"5" = 4 dr Sedan
"8" = 4dr wagon
"9" = 4dr Wagon
7th = Restraint codes
1 - manual belts
3 - manual belts with driver airbag
4 - automatic belts
0 - incomplete vehicle
8th = Engine Code
1 - 2.0L L4
C - 3.8L 3800
D - 2.3L DOHC Quad 4
N - 3.3L 3300 V6
R - 2.5L Tech IV L4
U - 2.5L L4
W - 2.8L V6
Y - 5.0L V8
9th = check digit
10th = tell what year it is "L" = 1990
11th = What Plant the car was Produced
12th - 17th = Production Sequence numbers
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