Free Buick VIN Decoder
Buick VIN Decoder & Lookup Tool
A Buick VIN decoder translates the 17-character VIN into the vehicle's factory identity — year, model, trim, engine, transmission, drivetrain, body style, and assembly plant — using the official NHTSA vPIC database. CarWhere's Buick decoder is free with no account, and pairs every decode with verified buyer transaction prices for the same Buick, so you see both what the vehicle is and what people actually paid for it.
Reviewed by the CarWhere Vehicle Data Team · Last updated 2026-06-11
Try a sample: KL4MMBSL2MB123456Sample 2021 Buick Encore GX Preferred built at GM Korea (Bupyeong).
Enter a VIN to Decode
Want more than a decode?
The $9.99 Full VIN Report adds the original window sticker (where available), itemized factory options, open NHTSA recalls, a market price check from verified buyers, and a negotiation target. See a sample · Get the report
Buick window sticker: original Monroney labels are available free — Buick publishes them through a public manufacturer system. Free Buick window sticker lookup →
About Buick
Buick was founded in 1903 by David Dunbar Buick and is one of the oldest automotive brands in the United States — though today most Buicks are built outside the U.S. The Encore, Encore GX, and Envision are all imported (Korea, China, Mexico), making Buick one of the few "American" brands whose VINs typically don't start with 1. KL4 (Korea) and LRB (China) are the prefixes you'll most commonly see on a 2020+ Buick.
CarWhere has 2 verified Buick buyer transactions with an average selling price of $26,343 and average discount of 2.7% off MSRP. Use the VIN decoder above to identify the exact Buick configuration, then compare it against real transaction prices.
What a Buick VIN Tells You
Every Buick VIN encodes 13 distinct vehicle attributes. Our decoder surfaces the ones that matter most for identifying, valuing, and researching a specific Buick:
Year
Model year — encoded in character 10 of the VIN
Model & Trim
Specific Buick model line and trim level
Engine
Displacement, cylinder count, and fuel type
Transmission
Automatic, manual, CVT, or DCT — and gear count
Drive Type
AWD, FWD, RWD, or 4WD configuration
Body Style
Sedan, SUV, truck, hatchback, coupe, convertible
Plant
Where this specific Buick was assembled
Country
Country of origin — derived from the WMI prefix
How a Buick VIN Is Structured
All modern Buick VINs follow ISO 3779 — the international 17-character VIN standard adopted in 1981. The 17 characters break into four fixed sections:
World Manufacturer Identifier (WMI)
For Buick, the WMI is typically 1G4, KL4, LRB. 1G4 identifies older Buick passenger cars (Regal, LaCrosse). KL4 identifies modern Buick SUVs (Encore, Encore GX, Envision) — many of which are built in South Korea by GM Korea. LRB identifies Buick Envision built in Yantai, China.
Vehicle Descriptor Section (VDS)
Encodes the Buick model line, body style, restraint system, and engine. Position 8 specifically identifies the engine — the most ambiguous character because the same digit can mean different engines on different Buick models.
Check Digit
A mathematical checksum derived from the other 16 characters. If a Buick VIN doesn't pass the check-digit test, it's either a typo or a forgery.
Model Year
A single character encoding the model year. Examples on a Buick: L = 2020, M = 2021, N = 2022, P = 2023, R = 2024, S = 2025, T = 2026.
Plant Code
Identifies the specific Buick assembly plant. Buick operates plants in Bupyeong, South Korea (Encore GX, Envision GX), Yantai, China (Envision), Ramos Arizpe, Mexico (Encore).
Sequential Production Number
The unique six-character serial number for that specific Buick unit. Two Buick vehicles with the same year, model, trim, and plant will differ only in this final segment.
Popular Buick Models
The most common Buick models by U.S. sales volume. Click any model to see verified buyer transactions and current pricing on CarWhere.
Where Buick Vehicles Are Built
The 11th character of a Buick VIN identifies the assembly plant. Buick operates the following facilities that supply U.S.-market vehicles:
- •Bupyeong, South Korea (Encore GX, Envision GX)
- •Yantai, China (Envision)
- •Ramos Arizpe, Mexico (Encore)
- •Lansing, Michigan (Enclave)
How to Decode a Buick VIN
Find the VIN on your Buick
Locate the 17-character VIN on the lower driver's-side corner of the windshield, the driver's door jamb, your registration, or your insurance card.
Enter the VIN
Type or paste the 17-character VIN into the decoder above. We strip spaces and dashes automatically and convert lowercase letters to uppercase. The tool rejects VINs containing I, O, or Q.
Decode instantly
Click "Decode VIN." Our server queries the NHTSA vPIC database and returns the full vehicle specification in under a second.
See what buyers paid for the same Buick
If we have verified buyer transactions for the decoded year/make/model, we surface the average selling price, average discount off MSRP, and total verified deal count — and link you to the full Buick model page.
Buick VIN year chart (10th character)
The 10th character of every Buick VIN encodes the model year under the federal VIN standard. Letters I, O, Q, U, and Z are never used; the cycle repeats every 30 years (so "A" means 2010 on modern vehicles, 1980 on classics).
Sources and limitations
CarWhere's Buick VIN decoder uses NHTSA vPIC, the U.S. government VIN-decoding platform built from manufacturer-submitted vehicle data (model years 1981 and newer). Recall status for a specific VIN can be confirmed at the official NHTSA recall lookup. Decode results may be limited for non-US-market vehicles, gray-market imports, or VIN patterns with incomplete manufacturer submissions. A VIN decode does not show accident, title, lien, mileage, or theft history.
Buick VIN Decoder FAQ
What does a Buick VIN decoder tell you?
A Buick VIN decoder reveals the model year, model name, trim level, engine type and displacement, transmission, drive type, body style, and assembly plant of any Buick vehicle. It uses NHTSA vPIC, the public VIN-decoding platform built from manufacturer-submitted data (model year 1981-forward); decode fields vary by model year and manufacturer submission. It does not show accident or ownership history.
What does a Buick VIN start with?
Buick VINs typically start with 1G4, KL4, LRB. 1G4 identifies older Buick passenger cars (Regal, LaCrosse). KL4 identifies modern Buick SUVs (Encore, Encore GX, Envision) — many of which are built in South Korea by GM Korea. LRB identifies Buick Envision built in Yantai, China.
Where is the VIN on a Buick?
The easiest place to find the VIN on a Buick is the lower corner of the windshield on the driver's side dashboard, visible from outside the vehicle. It's also printed on the driver's door jamb sticker, the vehicle title, the registration card, and the insurance card. On older models the VIN may be stamped on the engine block or firewall.
How many characters is a Buick VIN?
Every Buick VIN is exactly 17 characters — a mix of letters and numbers. Like all modern VINs, Buick VINs never contain the letters I, O, or Q to avoid confusion with the digits 1, 0, and 9. A Buick VIN with fewer or more than 17 characters is either a partial reference or an error.
Is the Buick VIN decoder really free?
Yes. CarWhere's Buick VIN decoder is completely free with no signup, account, or credit card required. We use the NHTSA vPIC API — the official U.S. government VIN database that every U.S.-market Buick is filed against. We additionally cross-reference the decoded year, make, and model against verified buyer transactions in our deal database.
Where are Buick vehicles built?
Buick operates assembly plants in Bupyeong, South Korea (Encore GX, Envision GX), Yantai, China (Envision), Ramos Arizpe, Mexico (Encore), Lansing, Michigan (Enclave). The 11th character of a Buick VIN identifies the specific plant of manufacture, while the first three characters (the World Manufacturer Identifier) identify the country.
Can I check Buick recalls by VIN?
Yes — once you decode a Buick VIN here, you can cross-reference open recalls at the official NHTSA recall lookup at nhtsa.gov/recalls. Buick also operates an owner portal where logged-in owners can view recall status and schedule free repairs at any authorized Buick dealer.
Does a Buick VIN reveal accident history?
No. A VIN decode reveals factory specifications only — make, model, trim, engine, plant. To check accident history, salvage titles, or odometer rollback on a Buick, you need a vehicle history report from Carfax or AutoCheck, both of which use the VIN as the lookup key but pull from insurance and DMV records.
VIN Decoders for Other Makes
Decoded a Buick VIN? See what buyers paid.
CarWhere has verified buyer transactions for Buick vehicles nationwide — real prices from real deal sheets, not dealer ads or algorithm estimates.