Cadillac VIN Check
Every Cadillac vehicle manufactured for the North American market since 1981 carries a standardized 17-character Vehicle Identification Number (VIN) regulated by NHTSA under FMVSS 565 and ISO 3779. This code is unique to each vehicle and encodes the country of assembly, manufacturer identity, model attributes, engine configuration, model year, assembly plant, and production sequence number. Decoding a Cadillac VIN helps you verify a used-vehicle listing, confirm the correct parts and service history, check for open recalls, and detect potential title fraud.
Cadillac uses manufacturer-specific encoding in the Vehicle Descriptor Section (positions 4–8). Position 4 typically identifies the model line — for example, popular Cadillac models include Escalade, CT4, CT5, XT4, XT5, XT6, Lyriq. Position 8 usually encodes the engine type. Position 9 is a mathematical check digit that detects typos and many forms of VIN tampering. Position 10 encodes the model year, and position 11 identifies the assembly plant. 1G6 covers Cadillac cars; 1GY is commonly used for Escalade and Cadillac SUVs.
Founded in 1902, Cadillac became America's premier luxury brand and pioneered innovations including the electric starter and V8 engine. The Escalade remains Cadillac's flagship and one of the best-selling full-size luxury SUVs.
How to Read a Cadillac VIN
To read a Cadillac VIN manually, start with the WMI (positions 1–3) to confirm the manufacturer and country of origin. For Cadillac, the WMI prefixes in our database include 1G6, 1GY and others depending on where the vehicle was built.
Position 4 encodes the Vehicle Line. Common values include A=Passenger car, B=Passenger car, C=Truck, D=Multi-purpose, E=Incomplete vehicle, F=SUV. Position 5 encodes trim or series level. Position 8 encodes the engine (A=2.0L Turbo 4-cyl, B=2.5L 4-cyl, C=3.6L V6, D=5.3L V8, E=6.2L V8). Position 9 is the check digit — our decoder validates it automatically using the ISO 3779 weighted-sum algorithm. Position 10 is the model year (see our year-code reference), and position 11 is the assembly plant (A=Lansing, MI, B=Bowling Green, KY, C=Detroit, MI, D=Lordstown, OH, E=Fort Wayne, IN). Positions 12–17 are the unique serial number for that vehicle.
Because Cadillac may change VDS encoding between model years, treat decoded attributes as informational. Always confirm critical details (engine, trim, drivetrain) against the window sticker, build sheet, or dealer records.
Cadillac VIN Position Breakdown
| Pos. | Section | Standard Meaning | Cadillac Notes |
|---|---|---|---|
| 1 | WMI | Country of manufacture | ISO 3779 region code — e.g. 1=USA, J=Japan, W=Germany |
| 2 | WMI | Manufacturer | Combined with pos. 1–3 identifies Cadillac |
| 3 | WMI | Vehicle type | Cadillac WMI codes: 1G6 (United States), 1GY (United States) |
| 4 | VDS | Vehicle Line | A=Passenger car; B=Passenger car; C=Truck; D=Multi-purpose; E=Incomplete vehicle; F=SUV; G=Van; H=Commercial truck |
| 5 | VDS | Series | Trim, series, or drive configuration |
| 6 | VDS | Body / restraint | Body style and/or restraint system (varies by year) |
| 7 | VDS | Restraint / body | Supplemental restraint or body attribute |
| 8 | VDS | Engine | A=2.0L Turbo 4-cyl; B=2.5L 4-cyl; C=3.6L V6; D=5.3L V8; E=6.2L V8; F=6.6L Duramax Diesel |
| 9 | Check digit | Validation | ISO 3779 weighted-sum check — detects typos and tampering |
| 10 | VIS | Model year | Standard 30-year letter/digit cycle (1980–2039) |
| 11 | VIS | Assembly plant | A=Lansing, MI; B=Bowling Green, KY; C=Detroit, MI; D=Lordstown, OH; E=Fort Wayne, IN; F=Flint, MI |
| 12–17 | VIS | Serial number | Unique production sequence at the assembly plant |
Frequently Asked Questions — Cadillac VIN
Where is the VIN on a Cadillac?
Dashboard at windshield base, driver's door jamb, and on the vehicle title.
What does 1G6 mean in a Cadillac VIN?
The WMI prefix 1G6 identifies a Cadillac vehicle. 1G6 covers Cadillac cars; 1GY is commonly used for Escalade and Cadillac SUVs.
How do I decode a Cadillac VIN for free?
Enter your 17-character Cadillac VIN in the decoder above. Our engine validates the check digit, reads the model year, identifies the assembly plant, and applies Cadillac-specific rules for positions 4–8 where available.
Can a Cadillac VIN tell me the engine type?
For most Cadillac models, position 8 encodes the engine family or displacement. Our decoder maps this using manufacturer data. Popular models like Escalade and CT4 are supported.
What plants build Cadillac vehicles?
Position 11 is the assembly plant code. Cadillac operates factories worldwide — our decoder translates the plant letter to a city and country. 1G6 covers Cadillac cars; 1GY is commonly used for Escalade and Cadillac SUVs.
How do I verify a Cadillac VIN is genuine?
Use our decoder to validate the check digit at position 9. A valid Cadillac VIN like 1G6AA5RX30G012345 must pass the ISO 3779 check-digit test. Also compare the dashboard VIN with the door jamb label — mismatches may indicate tampering.
Does the model year in a Cadillac VIN match the calendar year?
Not always. Position 10 encodes the model year using the standard 30-year ISO cycle. A vehicle assembled in late 2024 may carry a 2025 model-year code. Always treat position 10 as the manufacturer's designated model year.
Which Cadillac models can I decode?
Our decoder supports all Cadillac models with standard 17-character VINs since 1981, including Escalade, CT4, CT5, XT4, XT5, XT6, Lyriq. WMI lookup works for every Cadillac VIN; detailed trim and engine data is available where manufacturer encoding is documented.