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From position 1 to 3 of the number is the factory identification code (WMI):
1G2 PONTIAC USA
1GM PONTIAC USA
1NP PONTIAC USA
2G1 PONTIAC Canada
2G2 PONTIAC Canada
3G2 PONTIAC Mexico
3G7 Pontiac Mexico
5Y2 PONTIAC USA
6G2 PONTIAC Australia
KL2 PONTIAC Korea
From 4 to 5 positions of the number – the model and performance:
B_ – Parisienne (1983…1986)
B_ – Safari (1987…1989)
FS – Firebird
FV – Firebird Formula / Trans Am
HX – Bonneville SE
HY – Bonneville SLE
HZ – Bonneville SSEi
JB – Sunfire
NE – Grand Am SE
NF – Grand Am SE1
NG – Grand Am SE2
NV – Grand Am GT1
NW – Grand Am GT
SL – Vibe
SM – Vibe AWD
SN – Vibe GT
VX – GTO
WJ – Grand Prix SE
WK – Grand Prix SE1
WP – Grand Prix GT
WR – Grand Prix GTP
The 6th item is the body type:
1 – coupe, 2 doors
2 – sedan, 2 doors
3 – convertible, 2 doors
5 – sedan, 4 doors
6 – sedan-hatchback, 4 doors
8 – station wagon, 5 doors / hatchback
9 – station wagon
7 – safety system:
1 – seat belts
2 – seat belts and two front airbags
3 – seatbelts and driver’s airbag
4 – seatbelts, front and side airbags
4 – seatbelts, front and side airbags
The seatbelt, front and side airbags, front passenger sensing system.
7 – seat belts, front and side airbags, side airbags for rear seats
9 – static seat belts (very old models only)
8 item number – engine:
1 – 3.8L V6 (L67)
2 – 1.3L L4 (LY8)
4 – 2.2L L4 (LN2)
6 – 2.2L L4 (L42)
8 – 1,8 L L4 (LV6)
9 – 4,6 L V8 (L37)
A – 2,3 L L4 (LG0)
C – 4.0L V8 (L47)
D – 2.3L L4 (LD2)
E – 3.4L V6 (LA1)
E – 5.0L V8 (L03)
F – 2.2L L4 (L61)
F – 5.0L V8 (LB9)
G – 5.7L V8 (LS1)
H – 5.0L V8 (LX5)
H – 5.0L V8 (LG4)
J – 3,1L V6 (LG8)
K – 3,8L V6 (L36)
L – 1.8L L4 (LNK)
M – 1.4L L4 (L95)
M – 2.6L V6 (LY9)
N – 3,2L V6 (LA3)
P – 2,0L L4 (LSJ)
P – 5.7L V8
R – 3,0L V6 (L81)
S – 5.7L V8 (LS6)
S – 2.8L V6 (LB8)
T – 2.4L L4 (LD9)
U – 6.0L V8 (LS2)
W – 4.3L L6
Y – 4.6L V8 (LD8)
9 position of the number – check digit.
The 10th position of the number is the model year:
1971 =1 1982 =C 1993 =P 2004 =4
1972 =2 1983 =D 1994 =R 2005 =5
1973 =3 1984 =I 1995 =S 2006 =6
1974 =4 1985 =F 1996 =T 2007 =7
1975 =5 1986 =G 1997 =V 2008 =8
1976 =6 1987 =H 1998 =W 2009 =9
1977 =7 1988 =J 1999 =X 2010 =A
1978 =8 1989 =K 2000 =Y
1979 =9 1990 =L 2001 =1
1980 =A 1991 =M 2002 =2
1981 =B 1992 =N 2003 =3
Number 11 position is the assembly plant:
A – Arlington, Texas
Number items 12 through 17 are serial numbers.