How to decode a 2003 Chevrolet Blazer VIN

Characters 1-3 of a 2003 Chevrolet Blazer VIN

World Manufacturer Identifier (WMI) codes are unique three-digit sequences that identify the manufacturer of a specific vehicle. For instance, the WMI ‘1GN’ is assigned to General Motors LLC, indicating a vehicle produced by this manufacturer in the United States. Specifically, ‘1GN’ is utilized for vehicles that fall into the category of Multipurpose Passenger Vehicles (MPVs), such as the 2003 Chevrolet Blazer. This coding system is part of the larger 17-character Vehicle Identification Number (VIN) used globally to provide key information about a vehicle, including its manufacturing plant and year of production. The inclusion of WMIs in VINs allows for easy identification and verification of vehicles by authorities, services, and consumers alike.

List of WMI Codes for a 2003 Chevrolet Blazer

WMI: 1GN

Model Years Covered: 1987-2005
Example VIN: 1GNCS18X03K102865
Manufacturer Name: General Motors LLC
Vehicle Type: Multipurpose Passenger Vehicle (MPV)
City: Warren
State or Province: Michigan
Country: United States

Characters 4-8 are the Vehicle Descriptor Section (VDS) of a 2003 Chevrolet Blazer 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 2003 Chevrolet Blazer:

Known VDS for a 2003 Chevrolet Blazer
CS18X	CT18X	CS13X	DT13X

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 2003 Chevrolet Blazer 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 2003 Chevrolet Blazer VIN — Year Code

Year Code	Year
3	2003

11th Character in the 2003 Chevrolet Blazer VIN — Plant Code(s)

Known 2003 Chevrolet Blazer Assembly Factory VIN Code(s)

Plant Code	Plant City	Plant State	Plant Country	Plant Company Name	Example VIN
K	Linden	New Jersey	United States	Gm Truck Group	1GNCS18X03K102865

VIN Characters 12 - 17 of a 2003 Chevrolet Blazer

The final 6 characters in a 2003 Chevrolet Blazer’s 17-digit VIN are its serial number, which will be unique to every vehicle.

Check your Chevrolet Blazer’s VIN below:

How to find a 2003 Chevrolet Blazer’s VIN?

Locating the VIN number on your 2003 Chevrolet Blazer is key for identification. Here’s how to find it:

Look at the dashboard on the driver’s side of your Chevrolet Blazer. You can typically see the VIN through the windshield on the lower corner.
Open the driver’s side door and examine the door jamb area. There’s usually a sticker with the VIN where the door latches closed.
Check the engine bay. There may be a plate or sticker with the VIN on the firewall inside the engine compartment.
Inspect the rear wheel well. Sometimes the VIN can be found above the tire on the frame.
Look at your vehicle registration documents, insurance card, or title, where the VIN of your Chevrolet Blazer will always be listed.

What info can a 2003 Chevrolet Blazer VIN reveal?

Model Year: The VIN can reveal the vehicle’s model year, indicating that it might be from the year 2003, providing insights into the age and potential market value of the vehicle.
Vehicle Specifications: The VIN can provide specifics such as the make and model, such as the Chevrolet Blazer with a 4.3L V-shaped engine configuration and a multipoint fuel injection system for fuel delivery.
Body Class and Doors: VIN decoding can reveal the body class, such as a Sport Utility Vehicle (SUV)/Multi-Purpose Vehicle (MPV) with 4 doors, possibly indicating both the vehicle’s style and accessibility.
Drive Type: The drive type can also be identified from the VIN, possibly showing that the vehicle is equipped with 4WD (4-Wheel Drive), which might enhance its off-road and adverse weather capabilities.
Fuel Type: The VIN might indicate the primary fuel the vehicle uses is Gasoline, possibly providing insights into fuel efficiency and environmental impact.
Gross Vehicle Weight Rating: The decoded VIN can provide details about the vehicle’s gross weight rating, possibly placing it in Class 1D, which might be between 5,001 - 6,000 lb, important for understanding vehicle handling, performance, and registration categories.
Manufacturing Details: The VIN might reveal manufacturing specifics such as the plant location in Linden, New Jersey by the GM Truck Group, possibly pinpointing where the vehicle was assembled which can indicate build quality standards.

Don’t have your 2003 Chevrolet Blazer’s VIN handy? Try our license plate lookup instead!

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Sample VIN Decode Report for a 2003 Chevrolet Blazer

Vehicle Spec	Value
Body Class	Sport Utility Vehicle (SUV)/Multi-Purpose Vehicle (MPV)
Displacement (CC)	4300.0
Displacement (CI)	262.40209960734
Displacement (L)	4.3
Doors	4
Drive Type	4WD/4-Wheel Drive/4x4
Engine Configuration	V-Shaped
Engine Manufacturer	WRN
Engine Model	LU3 90 Degrees
Engine Number of Cylinders	6
Fuel Delivery / Fuel Injection Type	Multipoint Fuel Injection (MPFI)
Fuel Type - Primary	Gasoline
Gross Vehicle Weight Rating From	Class 1D: 5,001 - 6,000 lb (2,268 - 2,722 kg)
Model	Blazer
Model Year	2003
Plant City	Linden
Plant Company Name	GM Truck Group
Plant Country	United States
Plant State	New Jersey
Trim	1/2 Ton
Vehicle Descriptor	1GNDT13X*3K
Vehicle Type	Multipurpose Passenger Vehicle
Sample_VIN	1GNDT13X03K106231