A Cadillac STS VIN is 17 characters. Positions 1–3 say who built it and where, 4–8 describe the body and engine, 9 is a check digit, 10 is the model year, 11 is the plant, and 12–17 are the serial number. Decode a STS VIN here and you also get its 10 recall campaigns and 342 owner complaints filed with NHTSA — free.
How to read a Cadillac STS VIN
Here is a real 2009 Cadillac STS VIN from our database, split into its parts:
VIN 1G6DL67A490139798 — decoded free on its own report page.
| Position | Section | What it tells you |
|---|---|---|
| 1–3 | WMI | World Manufacturer Identifier — country, manufacturer and vehicle type. |
| 4–8 | VDS | Vehicle Descriptor Section — body style, engine, restraint system, series. |
| 9 | Check digit | A calculated digit that validates the whole VIN. Wrong digit = wrong VIN. |
| 10 | Model year | One character for the model year. Letters skip I, O, Q, U and Z. |
| 11 | Plant | The assembly plant that built the car. |
| 12–17 | Serial | Sequential production number of this exact vehicle. |
Where Cadillac STS VINs say the car was built
The first three characters are the World Manufacturer Identifier. Across 9 Cadillac STS VINs we have on file, these are the codes that actually show up — and the plants behind them:
| WMI | Built in | Vehicle type | VINs on file | Share |
|---|---|---|---|---|
| 1G6 | United States | — | 9 |
Country and vehicle type come from the NHTSA manufacturer registry. Share is measured across VINs decoded on ForCar, not production volume.
Model-year codes for the Cadillac STS
Position 10 carries the model year, skipping I, O, Q, U and Z. The alphabet comes round every 30 years, which the Cadillac STS has not yet outlived — its 7 years still map one-to-one. All 7 model years of the Cadillac STS, 2005 to 2011, with the character each one carries:
| Model year | VIN character (position 10) | Same character as |
|---|---|---|
| 2011 | B | — |
| 2010 | A | — |
| 2009 | 9 | — |
| 2008 | 8 | — |
| 2007 | 7 | — |
| 2006 | 6 | — |
| 2005 | 5 | — |
When two years share a character, the check digit and serial range tell them apart — that is what the decoder does automatically.
Body and engine characters we see on Cadillac STS VINs
Positions 4 through 8 describe the build, and manufacturers assign them themselves — the same letter means different things on different marques. Across 9 VINs the Cadillac STS uses 9 different characters in these three slots alone — the ones below, ordered by how much of the Cadillac fleet each covers:
| Position | Characters seen on real VINs | Variety |
|---|---|---|
| 4 — body | D (100%) | 1 distinct |
| 5 — series | C (33%) · Z (33%) · L (11%) · W (11%) · X (11%) | 5 distinct |
| 8 — engine | A (78%) · V (11%) · D (11%) | 3 distinct |
A character that dominates the column usually marks the body style the model was mostly sold in; a spread across several means multiple bodies or engines shared the same platform.
What a decoded Cadillac STS VIN gets you
Reading the characters is the easy part — the reason to decode a VIN is what sits behind it. For the Cadillac STS that is 342 owner complaints and every recall campaign NHTSA has on record, keyed to the same VIN you just read:
| Data | For this model | Source |
|---|---|---|
| Recall campaigns | 10 campaigns | NHTSA |
| Owner complaints | 342 filed | NHTSA |
| Fuel economy | 19 mpg combined (avg) | EPA |
| Model years covered | 7 years | ForCar catalog |
Where to find the VIN on a Cadillac STS
A Cadillac STS VIN normally opens with 1G6. Four places on the car carry the full number, and all four must agree — on a Cadillac STS, a plate that disagrees is where fraud shows itself first.
| Where | How to see it | Why it matters |
|---|---|---|
| Dashboard, driver side | Through the windshield, bottom corner | Easiest to check before you touch anything |
| Driver door jamb | Open the door, sticker on the pillar | Also lists tyre pressures and build date |
| Under the hood | Firewall or strut tower plate | Survives a windshield replacement |
| Title and insurance | Paper documents | Must match the car — a mismatch means fraud or a swapped panel |
You know what it is. Find out what it's worth.
- Exact value for this VIN, adjusted for mileage
- The original window sticker and factory options
- Full research report as a PDF you can hand to a mechanic
- Decode a whole list of VINs at once
- No ads, no tracking — and much more
Frequently asked questions
Is this Cadillac STS VIN decoder free?
Yes — decoding a Cadillac STS VIN costs nothing and needs no account. Beyond the year, plant and build characters you also get what NHTSA holds on the Cadillac STS — 10 recall campaigns and 342 owner complaints — at no charge.
How many characters is a Cadillac STS VIN?
Seventeen, on every Cadillac STS built from 1981 onwards, when the 17-character format became mandatory in the US. The oldest Cadillac STS VIN on file here is a 2005, so everything in our Cadillac data already uses the modern layout.
Why do two Cadillac STS model years share the same VIN character?
Position 10 cycles through the alphabet every 30 years, skipping I, O, Q, U and Z. A 1995 and a 2025 car can carry the same letter. The check digit and serial range separate them.
Can a Cadillac STS VIN tell me if the car was in an accident?
Not from the characters themselves — they describe how the Cadillac STS left the factory, not what happened to it afterwards. Crash and title records sit in separate databases keyed to the same number. What is public are the 342 complaints Cadillac STS owners filed with NHTSA, and those we do show. Run the number through our VIN check to see what is on the record for it.
Do the body and engine characters mean the same thing on every Cadillac?
No, and that is the usual mistake — positions 4–8 are assigned per model, not per brand. A letter that means one body on the Cadillac STS can mean a different one on another Cadillac, and something else again on another marque. On Cadillac STS VINs the character that dominates position 4 is D — read it against the table above, not against a generic chart.
What if the VIN on the dashboard doesn't match the door jamb?
Treat it as a red flag on any car, and on a Cadillac STS check the prefix first: a genuine one opens with 1G6, and a plate that starts otherwise did not come off this car. Beyond that, mismatched plates mean either a replaced panel or a tampered identity — ask for documents and verify before any money changes hands.
Mark ForCar as a preferred source and our data shows up first in your Google results. One click, no account.