Chevrolet serial number identification11/13/2022 ![]() One element that is fairly consistent is the use of position 9 as a check digit, compulsory for vehicles in North America and used fairly consistently even outside this rule. Each manufacturer has a unique system for using this field. This is used, according to local regulations, to identify the vehicle type and may include information on the platform used, the model, and the body style. The 4th through 9th positions in the VIN are the Vehicle Descriptor Section or VDS. Thomas Built Buses and Freightliner Custom Chassis The following table contains a list of commonly used WMIs assigned to buses. The Society of Automotive Engineers (SAE) in the US assigns WMIs to countries and manufacturers. The SAE will then assign a second WMI code that will appear in digits 12-14 of the VIN, with only the last three being the vehicle's sequential serial number. In the third position of the VIN, any letter or number may be used to avoid duplication with other assigned WMI's, but the number "9" is reserved for manufacturers of less than 500 vehicles per year. Though there are exceptions, the second digit of the VIN is intended be the first letter of the manufacturer's name. Common auto-manufacturing countries are noted. In practice, each is assigned to a country of manufacture. The first character of the WMI is the region in which the manufacturer is located. For example, within 1G (assigned to General Motors in the United States), 1G1 represents Chevrolet passenger cars 1G2, Pontiac passenger cars and 1GC, Chevrolet trucks. Some manufacturers use the third character as a code for a vehicle category (e.g., bus or truck), a division within a manufacturer, or both. ![]() ![]() A manufacturer that builds fewer than 500 vehicles per year uses a 9 as the third digit and the 12th, 13th and 14th position of the VIN for a second part of the identification. ![]() The first three characters uniquely identify the manufacturer of the vehicle using the World Manufacturer Identifier or WMI code. Manufacturer Identifier (third digit is 9 for < 500 vehicles) The VIN is composed of the following sections: Compatible but somewhat different implementations of these ISO standards have been adopted by the European Union and the United States of America. Modern Vehicle Identification Number systems are based on two related standards originally issued by the International Organization for Standardization in 19, ISO 3779 and ISO 3780, respectively. ![]()
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