Gm Opel Calculator By Vin

General Motors uses the following VIN formats and codes.

American VIN format

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GM has traditionally encoded the platform as the fourth character of the VIN. Other content includes an engine code and manufacturing plant. GM’s VIN format is as follows:

Platform codes

GM used a lettered system of automobile platform codes for three decades. These letters were used as the fourth position of the VIN. Though today’s GM platforms use Greek characters, they are still encoded with Latin characters in the fourth position. Position five encodes the specific model and trim level of the vehicle.

Body style codes

The Body type is specified as character six of the American GM VIN for passenger cars.

American restraint types

The restraint type is specified as character seven of the American GM VIN for passenger cars.

American engine codes

GM encodes the engine type in character 8 of the VIN. The following table outlines the various engines encoded there:

Engine codes for passenger cars

Mistake on the engine code M, this M code comes out on the 1995 – 1999 Chevrolet Monte Carlo and the engine is an RPO L82 3.1 SFI engine.

VIN code T also designates a 3.1 V6, the base engine in the 1990-92 Camaro/Firebird platform, and VIN code 8 is much better known as the L98 5.7 V8 TPI, standard in the 1985-91 Corvette and optional in the 1987-92 Camaro/Firebird platform .

Missing Entry: 1985-1988 Pontiac Fieros have a 9 engine code for the 2.8L L44 V6.

Missing Entry: The 2009 Corvette uses a W engine code for the 6.2L LS3 V8.

Missing Entry: Vin Code V for 2.4 L LE9 2.4L MFI I4

Warning: Issues with the decoding are related to year/model combinations. Such as the 4.1 V6 is not included in the list, however it was used on El Dorada and some Cadillac models. Each Year has different break down for each code, a complete list would be a subject of its own. Along with Plants and some model break downs over years.

Missing Entry: 1991 Limo with engine code 7, is not listed. According to one source the limo engine is a 5.7L.

Gm Opel Calculator By Vin Numbers

Engine codes for light trucks

There is a mistake for 2012. The engine code for 4.8 L Flexfuel engine is an A and is not listed.
VIN Size Type Fuel Gen
1 6.6 L V8 Diesel
2 6.6 L V8 Diesel
B 5.3 L V8 Gas III-L33 Vortec 5300 310hp Alum Blk Alum Heads HO
D 6.6 L V8 Diesel
G 8.1 L V8 Vortec 8100
J 6.2 L V8 Diesel Non-Turbo
L 2.5 L L4
M 5.0 L V8
N 6.0 L V8 III-LQ9
P 5.3 L V8 Gas III-LM4 Vortec 5300 290hp Alum Blk Alum Heads
K 5.7 L V8 TBI V0604VSA
R 5.7 L V8 I-L31 Vortec 5700
S 4.2 L L6
T 5.3 L V8 III-LM7 Vortec 5300 270-295hp
U 6.0 L V8 III-LQ4
V 4.8 L V8
W 4.3 L V6 CPI
X 4.3 L V6 Vortec Iron Blk Iron Heads
Z 4.3 L V6 TBI

American GM factories

See List of GM factories.

GM WMIs

Gm Opel Calculator By Vin Number

Also mistake on Country codes…GMC light trucks are not listed. The code is 1GT which indicates Ft Wayne, IN.

Gm Opel Calculator By Vin Code