How to decode a 2004 Chevrolet Trailblazer VIN

Characters 1-3 of a 2004 Chevrolet Trailblazer VIN

World Manufacturer Identifier (WMI) codes are unique sequences used to identify the manufacturer of a vehicle. For the 2004 Chevrolet Trailblazer, the WMI is “1GN,” signifying that General Motors LLC, headquartered in Warren, Michigan, USA, is the manufacturer. This specific WMI indicates that the vehicle falls under the category of Multipurpose Passenger Vehicles, highlighting its versatility. General Motors uses the “1GN” code to uniquely identify vehicles such as the Trailblazer produced between 2002 and 2009, ensuring each vehicle’s origin and specifications are easily traceable. This code is a crucial part of the Vehicle Identification Number (VIN), which is used worldwide to provide detailed information about a vehicle’s history, manufacturer, and specific characteristics.

List of WMI Codes for a 2004 Chevrolet Trailblazer

WMI: 1GN

Model Years Covered: 2002-2009
Example VIN: 1GNES16P046230707
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 2004 Chevrolet Trailblazer 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 2004 Chevrolet Trailblazer:

Known VDS for a 2004 Chevrolet Trailblazer
ES16P	ES16S	DT13S	ET16P	DS13S	ET16S

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 2004 Chevrolet Trailblazer 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 2004 Chevrolet Trailblazer VIN — Year Code

Year Code	Year
4	2004

11th Character in the 2004 Chevrolet Trailblazer VIN — Plant Code(s)

Known 2004 Chevrolet Trailblazer Assembly Factory VIN Code(s)

Plant Code	Plant City	Plant State	Plant Country	Plant Company Name	Example VIN
2	Moraine	Ohio	United States	Gm Truck Group	1GNDT13S042102055
6	Oklahoma City	Oklahoma	United States	Gm Truck Group	1GNES16P046230707

VIN Characters 12 - 17 of a 2004 Chevrolet Trailblazer

The final 6 characters in a 2004 Chevrolet Trailblazer’s 17-digit VIN are its serial number, which will be unique to every vehicle.

Check your Chevrolet Trailblazer’s VIN below:

How to find a 2004 Chevrolet Trailblazer’s VIN?

Locating the VIN number on your 2004 Chevrolet Trailblazer is key for identification. Here’s how to find it:

Look at the dashboard on the driver’s side of your 2004 Chevrolet Trailblazer. It’s typical to find the VIN through the windshield on the corner where the dashboard meets the glass.
Open the driver’s side door and examine the door jamb for a sticker or plate on your Chevrolet Trailblazer. The VIN is often located where the door latches.
Check under the hood of your Trailblazer; the VIN might be stamped on the engine block or affixed to the firewall of the engine compartment.
Examine the rear wheel well above the tire. Sometimes, the VIN is located on the body of the vehicle in the wheel well area.
Check your vehicle registration documents, insurance cards, or the title of your Chevrolet Trailblazer, as the VIN is usually listed on these official documents.

What info can a 2004 Chevrolet Trailblazer VIN reveal?

Model Year: The VIN can reveal the vehicle’s production year as 2004, offering insights into the vehicle’s age and potentially the generation it belongs to.
Body Class: The vehicle falls under the “Sport Utility Vehicle (SUV)/Multi-Purpose Vehicle (MPV)” category, providing a clear idea about its size, design, and intended use.
Engine Type: The VIN indicates it has an In-Line, 6-cylinder engine with a displacement of 4.2 liters, designed by GM, specifically model LL8, emphasizing the vehicle’s power and performance capabilities.
Drive Type: The listed 4WD/4-wheel drive/4x4 drive type signifies the vehicle’s drivetrain, hinting at its off-road capability or enhanced road traction in various conditions.
Fuel Type: The primary fuel type is Gasoline, which is critical for understanding the vehicle’s environmental impact and fuel consumption patterns.
Manufacturing Details: Information regarding the plant points out that the vehicle was assembled in Oklahoma City, United States by GM Truck Group, offering a glimpse into its production origin.
Safety and Performance Features: With a Hydraulic brake system and Water cooling type, it reveals the vehicle’s essential safety and performance-oriented systems, which are key considerations for potential owners.

Don’t have your 2004 Chevrolet Trailblazer’s VIN handy? Try our license plate lookup instead!

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Sample VIN Decode Report for a 2004 Chevrolet Trailblazer

Vehicle Spec	Value
Body Class	Sport Utility Vehicle (SUV)/Multi-Purpose Vehicle (MPV)
Brake System Type	Hydraulic
Cooling Type	Water
Displacement (CC)	4200.0
Displacement (CI)	256.29972519787
Displacement (L)	4.2
Doors	4
Drive Type	4WD/4-Wheel Drive/4x4
Engine Configuration	In-Line
Engine Manufacturer	GM
Engine Model	LL8
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	Trailblazer
Model Year	2004
Plant City	Moraine
Plant Company Name	GM Truck Group
Plant Country	United States
Plant State	Ohio
Trim	1/2 Ton
Valve Train Design	Dual Overhead Cam (DOHC)
Vehicle Descriptor	1GNDT13S*42
Vehicle Type	Multipurpose Passenger Vehicle
Sample_VIN	1GNDT13S042102055