Free GMC Sierra VIN Decoder

How to decode a GMC Sierra VIN

Characters 1-3 of a GMC Sierra VIN

World Manufacturer Identifier (WMI) codes are unique three-letter codes assigned to every vehicle manufacturer for identification purposes. For GMC Sierra trucks, these codes highlight their manufacturing details, indicating that they are made by General Motors LLC, primarily in Warren, Michigan, United States. The WMI codes for GMC Sierra trucks start with 1GT, 2GT, and 3GT, each signifying different periods or variants from 1989 through to 2024, with some gaps. These WMIs confirm the vehicles’ type as trucks, ensuring a standardized system for identifying the make, model year, and manufacturing location. This system plays a crucial role in vehicle registration, recall management, and tracking the history of a vehicle.

List of WMI Codes for a GMC Sierra

WMI: 1GT

• Model Years Covered: 1989-2024
• Example VIN: 1GTFK24ZXKZ528622
• 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: 2GTGK39N2K1566211
• Manufacturer Name: General Motors LLC
• Vehicle Type: Truck
• City: Warren
• State or Province: Michigan
• Country: United States

WMI: 3GT

• Model Years Covered: 2006-2024
• Example VIN: 3GTEK14V06G183965
• 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 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 2024 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 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 GMC Sierra VIN — Year Code

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

Known GMC Sierra Assembly Factory VIN Code(s)

VIN Characters 12 - 17 of a GMC Sierra

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

What info can a GMC Sierra VIN reveal?

• Model and Year: The VIN can decode specific model information, such as a 2021 Sierra, providing an easy identification of the vehicle’s make and model year.
• Engine Specifications: Detailed engine specs can be revealed, like a 3.0 Liter, 6-cylinder, in-line configuration diesel engine with turbo enhancement, indicating the vehicle’s power and efficiency capabilities.
• Safety Features: Standard and optional safety features are encoded within the VIN, ranging from Anti-lock Braking System (ABS) and Electronic Stability Control (ESC) to optional Adaptive Cruise Control (ACC) and Lane Keeping Assistance (LKA), illustrating the vehicle’s commitment to safety.
• Body and Drive Type: Insights into the vehicle’s structure and functionality, such as it being a Pickup with a Crew Cab type and 4x2 drive type, provide potential buyers with important configuration details.
• Advanced Technology: The VIN may include details on technological advancements included in the vehicle, such as standard Backup Camera and Keyless Ignition, as well as optional Blind Spot Warning (BSW) and Pedestrian Automatic Emergency Braking (PAEB), highlighting the integration of modern features for convenience and safety.
• Transmission and Performance: Information on the vehicle’s transmission, like an 8-speed automatic system, coupled with a dual overhead cam (DOHC) valve train design and a direct Tire Pressure Monitoring System (TPMS), points towards the vehicle’s operational efficiency and performance attributes.
• Manufacturing Details: The VIN can reveal manufacturing specifics, such as the plant city being Silao, in the state of Guanajuato, Mexico, offering insights into the vehicle’s origin which might be pertinent for historical or quality assurance perspectives.

Sample VIN Decode Report for a GMC Sierra