Free 2021 GMC Sierra VIN Decoder

How to decode a 2021 GMC Sierra VIN

Characters 1-3 of a 2021 GMC Sierra VIN

World Manufacturer Identifiers (WMIs) serve as unique codes assigned to every vehicle manufacturer, pinpointing key details about the vehicle, such as its make, model, and place of production. For the 2021 GMC Sierra, the WMI indicates that these trucks are manufactured by General Motors LLC, based in Warren, Michigan, United States. Specifically, the WMIs “3GT” and “1GT” signify trucks that fall under the General Motors umbrella, confirming their identity as GMC Sierras. These codes are integral in deciphering the vehicle’s origin, ensuring that each truck can be accurately traced back to its manufacturer. Thus, the WMI not only validates the authenticity of a 2021 GMC Sierra but also provides critical information regarding its manufacturing lineage.

List of WMI Codes for a 2021 GMC Sierra

WMI: 3GT

• Model Years Covered: 2006-2024
• Example VIN: 3GTP8DET0MG123137
• Manufacturer Name: General Motors LLC
• Vehicle Type: Truck
• City: Warren
• State or Province: Michigan
• Country: United States WMI: 1GT
• Model Years Covered: 1989-2024
• Example VIN: 1GT58MEY8MF153040
• 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 2021 GMC Sierra VIN

These characters correspond to components like:

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

Below find the most popular vehicle descriptor codes for a 2021 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 2021 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 2021 GMC Sierra VIN — Year Code

11th Character in the 2021 GMC Sierra VIN — Plant Code(s)

Known 2021 GMC Sierra Assembly Factory VIN Code(s)

VIN Characters 12 - 17 of a 2021 GMC Sierra

The final 6 characters in a 2021 GMC Sierra’s 17-digit VIN are its serial number, which will be unique to every vehicle.

Check your GMC Sierra’s VIN below:

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What info can a 2021 GMC Sierra VIN reveal?

• Model Year: The VIN can reveal the vehicles model year being the year 2021, providing insights into the age and potential market value of the vehicle.
• Body Type and Drive Type: A VIN can specify the body type, such as a Pickup, and the drive type, like a 4x2 drive type, offering detailed insights into the vehicle’s design and structure.
• Engine Specifications: Important engine details, such as a 3.0-liter, In-Line 6-cylinder diesel engine with turbocharging, can be encoded within the VIN, shedding light on the vehicle’s performance capabilities.
• Safety Features and Air Bag Locations: The VIN often includes safety equipment information, possibly indicating the presence of standard safety features like Anti-lock Braking System (ABS) and curtain airbags across all rows, providing insights into the level of protection the vehicle offers.
• Fuel Type and Transmission: Information about the primary fuel type, which in this example is diesel, and details on the transmission, such as being an 8-speed automatic, are typically found, giving potential buyers an idea of the vehicle’s fuel efficiency and driving experience.
• Advanced Technology Options: It may also indicate the availability of advanced technology options such as Adaptive Cruise Control, Blind Spot Warning, and Lane Keeping Assistance, highlighting whether they are standard, optional, or not available, offering insights into the available driving aids and technological conveniences.
• Manufacturing Details: Additionally, a VIN can provide manufacturing details like the plant city, country, and state, possibly pointing to specific manufacturing locations, adding to the historical and geographical context of the vehicle.

Sample VIN Decode Report for a 2021 GMC Sierra