Decode any General Motors VIN (Chevrolet, GMC, Buick or Cadillac) free, and see how to get the original GM window sticker.
What a GM VIN tells you
Every GM built since 1981 has a 17-character VIN. The first three characters (the World Manufacturer Identifier) show who built it and where; characters 4–8 describe the model, body and engine; the 10th character is the model year; the 11th is the assembly plant; and the last six are the vehicle’s serial number.
| VIN starts with | Usually means |
|---|---|
| 1G | GM vehicles built in the United States |
| 2G | GM vehicles built in Canada |
| 3G | GM vehicles built in Mexico |
| KL | GM vehicles built in South Korea |
Prefixes are a general guide. The decoder above reads the full VIN for the exact details.
How to get the original GM window sticker
GM keeps sticker records for many recent Chevrolet, GMC, Buick and Cadillac vehicles, but availability varies by model year, so not every VIN will have an original sticker on file.
GM brands covered
This page works for every GM brand. For brand-specific help, see our Chevrolet, GMC and Cadillac pages, and our GM RPO codes guide.
Where to find the VIN on a GM
- On the dashboard on the driver’s side; look through the bottom of the windshield
- On the label inside the driver’s door frame
- On the title, registration card and insurance card
Frequently asked questions
Can I get a GM window sticker for free?
Sometimes, for many recent GM vehicles. Our VIN lookup always shows factory specs free.
What is the SPID label?
The Service Parts Identification label, usually in the glovebox or spare-tire area, lists the car’s RPO option codes. It’s a useful backup when the window sticker is missing.
Does this work for Buick?
Yes. Any 17-character GM VIN can be decoded here.