Free 1999 GMC Sierra VIN Decoder

How to decode a 1999 GMC Sierra VIN

Characters 1-3 of a 1999 GMC Sierra VIN

A World Manufacturer Identifier (WMI) is a unique code assigned to every vehicle manufacturer to identify the origin of the vehicle. For the 1999 GMC Sierra, the WMIs “1GT” and “2GT” signify trucks manufactured by General Motors LLC, located in Warren, Michigan, United States. These codes are integral to the Vehicle Identification Number (VIN), offering insights into the vehicle’s manufacturing details. Model years 1989 through 2024 for “1GT” and 1989 through 2009, including 2018 for “2GT”, are part of the Sierra’s production line identified by these WMIs. This system is crucial for tracking, registration, and recall purposes, ensuring each truck’s history and specifications are accurately documented.

List of WMI Codes for a 1999 GMC Sierra

WMI: 1GT

• Model Years Covered: 1989-2024
• Example VIN: 1GTEK14T0XZ513135
• 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: 2GTEK19V5X1510850
• 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 1999 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 1999 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 1999 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 1999 GMC Sierra VIN — Year Code

11th Character in the 1999 GMC Sierra VIN — Plant Code(s)

Known 1999 GMC Sierra Assembly Factory VIN Code(s)

VIN Characters 12 - 17 of a 1999 GMC Sierra

The final 6 characters in a 1999 GMC Sierra’s 17-digit VIN are its serial number, which will be unique to every vehicle.

Check your GMC Sierra’s VIN below:

What info can a 1999 GMC Sierra VIN reveal?

• Model Year: The VIN can reveal the truck’s model year as 1999, providing insights into the vehicle’s age and potential market value.
• Body Class: The VIN indicates the vehicle is a Pickup with a Crew/Super Crew/Crew Max cab type, suggesting it is designed for both payload capacity and passenger comfort.
• Engine Type: The VIN specifies a 6.5 Liter, 8-cylinder (V-Shaped configuration) diesel engine manufactured by ROM, implying a robust and possibly heavy-duty performance characteristic, enhanced by a turbocharger for increased power.
• Fuel Type: The primary fuel type for this Sierra is diesel, which may suggest better fuel economy and towing capacity compared to gasoline counterparts.
• Drive Type: It operates with a 4x2 drive type, which can help in understanding the vehicle’s handling characteristics and drive configuration.
• Manufacturing Details: Manufactured in Flint, Michigan, United States by the GM Truck Group, this detail can provide insight into the vehicle’s origin and potentially its quality and craftsmanship.
• Vehicle Weight Class: Classified under Gross Vehicle Weight Rating from Class 2H: 9,001 - 10,000 lb (4,082 - 4,536 kg), this Sierra 3500 falls into a higher weight class, typically associated with heavy-duty trucks capable of substantial towing and payload capacities.

Sample VIN Decode Report for a 1999 GMC Sierra