Free 1990 GMC Sierra VIN Decoder

How to decode a 1990 GMC Sierra VIN

Characters 1-3 of a 1990 GMC Sierra VIN

A World Manufacturer Identifier (WMI) is a code that uniquely identifies the maker of a vehicle, according to internationally agreed-upon standards. For the 1990 GMC Sierra, the WMI can either be “1GT” or “2GT,” indicating that this truck was manufactured by General Motors LLC in Warren, Michigan, United States. The “1GT” WMI suggests that the vehicle was built for the U.S. market, while “2GT” could be used for vehicles constructed in the same location but perhaps detailing a specific variation or series within the model year. This coding system is critical for vehicle identification, allowing for the accurate tracking, registration, and recall of vehicles.

List of WMI Codes for a 1990 GMC Sierra

WMI: 1GT

• Model Years Covered: 1989-2024
• Example VIN: 1GTDC14Z1LZ545776
• Manufacturer Name: General Motors LLC
• Vehicle Type: Truck
• City: Warren
• State or Province: Michigan
• Country: United States WMI: 2GT
• Model Years Covered: 1989-2009, 2018
• Example VIN: 2GTEK14K4L1531857
• Manufacturer Name: General Motors LLC
• Vehicle Type: Truck
• City: Warren
• State or Province: Michigan
• Country: United States

Characters 4-8 are the Vehicle Descriptor Section (VDS) of a 1990 GMC Sierra VIN

These characters correspond to components like:

• Engine type
• Transmission
• Model or trim
• Body style
• Gross vehicle weight range

Below find the known vehicle descriptor codes for a 1990 GMC Sierra:

Auto manufacturers have some discretion to decide how they want to code this section, but its contents and decoded results are generally consistent.

Character 9 is the “check digit” in a 1990 GMC Sierra VIN.

Based on a formula developed by the US Department of Transportation, it helps reduce fraud by ensuring the validity of the VIN.

10th Character in the 1990 GMC Sierra VIN — Year Code

11th Character in the 1990 GMC Sierra VIN — Plant Code(s)

Known 1990 GMC Sierra Assembly Factory VIN Code(s)

VIN Characters 12 - 17 of a 1990 GMC Sierra

The final 6 characters in a 1990 GMC Sierra’s 17-digit VIN are its serial number, which will be unique to every vehicle.

What info can a 1990 GMC Sierra VIN reveal?

• Model Year: The VIN can reveal the vehicle’s model year, indicating the year 1990, offering insights into the age and potential technological features of the vehicle.
• Vehicle Type and Body Class: The VIN provides information categorizing the vehicle as a Truck, specifically as a Pickup, offering clues about its intended use, cargo capacity, and overall design.
• Engine Specifications: Detailed information from the VIN includes a V-shaped engine configuration, displacement measurements (5700.0 CC, 347.835 CI, and 5.7 L), and an engine with 8 cylinders manufactured by CPC, highlighting the powertrain’s characteristics.
• Fuel Type and Efficiency: According to the VIN, the vehicle uses Gasoline as its primary fuel type, with a Throttle Body Fuel Injection (TBI) system, indicating its fuel delivery mechanism which can influence its efficiency and performance.
• Drive Type: The VIN identifies the drive type as 4WD/4-Wheel Drive/4x4, suggesting the vehicle’s capability in handling various terrains and weather conditions, enhancing its utility and appeal to certain buyers.
• Manufacturing Details: The VIN decodes specifics like the manufacturing location being Oshawa Truck in Ontario, Canada, underpinning the vehicle’s origin and potentially affecting its build quality and parts availability.
• Model and Series Details: The VIN decodes the model as Sierra with a Conventional Cab and a 1/2 ton nominal trim, providing significant details about the vehicle’s size, capacity, and market position.

Sample VIN Decode Report for a 1990 GMC Sierra

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