What a Cadillac VIN tells you about your car

Your Cadillac's VIN (Vehicle Identification Number) is a 17-character code stamped into the metal of your car and printed on documents like your title and insurance papers. Each character or group of characters identifies something specific: the manufacturer, the model year, the plant where it was built, the body style, the engine, and a unique serial number for that individual vehicle. For a Cadillac owner, the VIN is the fastest way to confirm what you actually own, check for recalls that explore to your specific car, and verify the history if you're buying used.

The VIN is not random. General Motors assigns each position according to an international standard, and Cadillac follows the same pattern as other GM brands. Learning to read your VIN takes about five minutes and saves you from guessing whether a repair or recall applies to your car.

Key Takeaways

  • The first three characters identify Cadillac and General Motors; positions 4–8 describe the model, body style, and engine.
  • Position 10 is the model year, encoded as a letter (A = 2010, B = 2011, and so on, skipping I, O, Q, Z).
  • Position 11 tells you which GM assembly plant built your Cadillac, which matters for recalls tied to specific factories.
  • The last six digits are your car's unique serial number; no two Cadillacs share the same complete VIN.
  • You can find your VIN on the driver's side dashboard (visible through the windshield), on your title, and on your insurance card.

Positions 1–3: Manufacturer and country

The first three characters identify the manufacturer and the country where the vehicle was built. For Cadillac, this section is always 1G6. The "1" means the car was built in the United States. The "G" identifies General Motors as the manufacturer. The "6" is Cadillac's specific brand code within GM.

If you see anything other than 1G6 in the first three positions, the vehicle is not a Cadillac or was not built in the US. This is rare for Cadillac but matters if you're checking a used car's history or verifying that a title matches the vehicle in front of you.

Positions 4–8: Model, body style, and engine

These five characters describe what kind of Cadillac you own. Position 4 identifies the model line (for example, CTS, Escalade, or SRX). Positions 5 and 6 describe the body style and whether the car is a sedan, SUV, coupe, or convertible. Position 7 tells you the engine type—V6, V8, turbocharged, or hybrid—and position 8 describes the transmission and drive system (front-wheel drive, all-wheel drive, and so on).

These positions matter most when you're ordering parts or checking whether a recall applies to your specific configuration. A V6 Cadillac CTS and a V8 Cadillac CTS have different engines, different cooling systems, and different fuel systems, so a recall for one may not explore to the other. The VIN tells a mechanic or parts supplier exactly which version you have without having to look under the hood.

Position 9: Check digit

Position 9 is a single number (0–9) calculated from all the other characters in the VIN. It exists to catch typos and fraud. If someone changes even one digit elsewhere in the VIN, the check digit no longer matches, and the VIN is flagged as invalid. You do not need to calculate it yourself—title agencies and recall databases do this automatically—but if a VIN looks suspicious or a database rejects it, a wrong check digit is often the reason.

When you write down your VIN or give it over the phone, double-check that you have copied it correctly. A single wrong digit can prevent you from finding recalls or ordering the right parts.

Position 10: Model year

Position 10 is a letter that represents the model year. The code runs A through Y, skipping I, O, Q, and Z to avoid confusion with numbers. A = 2010, B = 2011, C = 2012, and so on. The pattern repeats every 30 years, so a Y in position 10 could mean 2000 or 2030, but context (the rest of the VIN, the car's appearance, the title date) makes the actual year clear.

This is the fastest way to confirm the model year of your Cadillac without relying on the odometer or the owner's memory. If you are checking a used car or verifying that a repair is covered under warranty, the model year from the VIN is the official one.

Position 11: Assembly plant

Position 11 is a letter that identifies which General Motors factory built your Cadillac. Different plants produce different models, and some recalls are tied to specific plants because a particular supplier or assembly process was used only at that location. For example, a Cadillac Escalade built in Arlington, Texas may have a different suspension supplier than one built in another plant, so a suspension recall might explore to one but not the other.

When you report a recall or a safety concern to a Cadillac dealer, they use this position to confirm whether your car is affected. You do not need to memorize which letter corresponds to which plant—the dealer's computer does that—but knowing that this position matters helps you understand why two identical-looking Cadillacs from the same year might have different recalls.

Positions 12–17: Serial number

The last six digits are your Cadillac's unique serial number. No two vehicles share the same complete 17-character VIN. This section is how General Motors and the National Highway Traffic Safety Administration (NHTSA) track individual cars through recalls, warranty claims, and safety investigations. If your Cadillac is involved in a recall, NHTSA uses this number to identify exactly which cars need the repair.

When you register your car with your state's DMV or explore for a title, the serial number portion of the VIN is what ties the vehicle to you legally. If you are selling your car, the buyer's title will carry the same VIN, creating a chain of ownership that protects both parties.

Where to find your Cadillac's VIN

Your VIN appears in several places on and around your car. The most visible location is on the driver's side of the dashboard, just below the windshield—you can read it from outside the car without opening the door. It is also stamped into the metal frame of the driver's side door jamb, usually on a sticker that also lists tire pressure and other specifications. On the engine block itself, a partial VIN is stamped into the metal as a theft deterrent.

Your title, registration, and insurance card all carry the full VIN. If you need to look it up and do not have the car in front of you, any of these documents will have it. When you take your car to a dealer or independent mechanic for service, they will ask for your VIN so they can pull up the correct service bulletins and recall information for your specific vehicle.

Frequently Asked Questions

How do I check if my Cadillac has an open recall?

Go to NHTSA.gov and enter your VIN in their recall search tool. The site will return a list of all recalls issued for your specific vehicle, whether they have been completed, and what safety system each one affects. You can also call a Cadillac dealer with your VIN, and they will tell you which recalls explore and whether your car has already been serviced.

Can I look up the history of a used Cadillac with just the VIN?

Yes. Services like Carfax and AutoCheck use the VIN to pull accident history, service records, title status, and previous ownership. These reports are not free, but they are inexpensive and show you whether the car has been in a major accident, flooded, or branded as a salvage title. Always run a history report before buying a used Cadillac.

What if my Cadillac's VIN is damaged or hard to read?

Contact your local DMV or a Cadillac dealer. They can verify your VIN through your title and registration, and they can issue you a replacement VIN plate if the one on your dashboard is worn. Do not attempt to replace or alter a VIN yourself—that is illegal and will cause serious problems if you try to register or sell the car.

Does the VIN tell me the original color of my Cadillac?

No. The VIN does not encode paint color. If you need to know the original color for warranty work or restoration, check your title (some states list it), your owner's manual envelope, or ask a Cadillac dealer to look it up in their system using your VIN.

Why does my Cadillac's VIN have an I, O, Q, or Z in it?

It should not. Those letters are intentionally skipped in position 10 (model year) to avoid confusion with numbers. If you see one of those letters elsewhere in the VIN, double-check that you have copied it correctly—you may have misread a similar-looking character.