GMC VIN Decoder
Enter any 17-character GMC VIN. Free US-market GMC VIN decoder backed by the official NHTSA VPIC database — engine code, assembly plant, model year, body class, and every open recall, in about 30 seconds.
How to read a GMC VIN
A GMC VIN, like any modern road-vehicle VIN, is 17 characters split into three blocks: the World Manufacturer Identifier (WMI) in positions 1–3, the Vehicle Descriptor Section (VDS) in positions 4–9, and the Vehicle Identifier Section (VIS) in positions 10–17. Here's a real GMC VIN broken down position by position.
112G3T4U596D7E8D9910M11Z122133144155166177
| Position | Chars | Meaning |
|---|---|---|
| 1 | 1 | Country of origin 1 = United States. GMC VINs starting with 2 are Canadian-built and 3 are Mexican (the Sierra is assembled in both Fort Wayne, IN and Silao, Mexico, depending on configuration). |
| 2-3 | GT | Manufacturer (WMI) GT = General Motors, GMC light-truck division. Other GMC WMIs include 1GK (SUV — Yukon/Acadia), 1GD (heavy-duty Sierra HD). Sibling GM divisions use their own WMIs: Chevrolet trucks are 1GC, Cadillac is 1G6/1GY — all share GM's VIN structure. |
| 4-8 | U9DED | Vehicle Descriptor Section (VDS) Encodes the platform, body style, restraint system, and engine. GM does not publish a public VDS-to-trim table, so CheckMyVIN reports what NHTSA VPIC returns directly (Model, Series, Trim, Body Class, Engine Model) rather than guessing what the individual characters mean. |
| 9 | 9 | Check digit A mod-11 checksum computed from the other 16 positions. NHTSA uses it to reject typos before returning a decode — if the check digit is wrong, VPIC returns an error and CheckMyVIN treats the VIN as unreadable. |
| 10 | M | Model year M = 2021. The full year code table is below. The 30-year cycle skips I, O, Q, U, Z and 0 to avoid being confused with similar-looking digits. |
| 11 | Z | Assembly plant For this VIN, Z maps to Fort Wayne Assembly (Indiana), where GM builds the Sierra 1500 and Silverado 1500. CheckMyVIN reads Plant City and Plant Country directly from the VPIC record rather than inferring the plant from this character — position 11 is brand-internal. |
| 12-17 | 234567 | Production sequence A 6-digit serial number that increments through the model year at that plant. Not useful on its own, but combined with year and plant it confirms the VIN is internally consistent. |
VIN year codes (position 10)
The 10th character of every modern VIN encodes the model year. The cycle skips the letters I, O, Q, U and Z, and the digit 0, to avoid being confused with similar digits. This table covers every model year currently on US roads.
| Code | Year | Code | Year | Code | Year |
|---|---|---|---|---|---|
| A | 2010 | H | 2017 | R | 2024 |
| B | 2011 | J | 2018 | S | 2025 |
| C | 2012 | K | 2019 | T | 2026 |
| D | 2013 | L | 2020 | V | 2027 |
| E | 2014 | M | 2021 | W | 2028 |
| F | 2015 | N | 2022 | X | 2029 |
| G | 2016 | P | 2023 | Y | 2030 |
GMC WMI codes (positions 1–3)
The first three characters of the VIN identify the manufacturer and country of assembly. GMC uses several WMI codes depending on plant and model line.
| WMI | Meaning |
|---|---|
| 1GT | GMC light truck (Sierra 1500, Canyon) — USA |
| 1GK | GMC SUV (Yukon, Yukon XL, Acadia) — USA |
| 1GD | GMC heavy-duty truck (Sierra HD 2500/3500) — USA |
| 2GT | GMC truck — Canada |
| 3GT | GMC truck (Sierra) — Mexico |
GMC build sheet & options
A full GMC build sheet — the original RPO (Regular Production Option) codes, paint code, package contents (e.g. the Denali Ultimate or AT4 off-road group), and dealer-installed extras — is not part of the federal NHTSA VPIC dataset. CheckMyVIN can confirm engine family (5.3L / 6.2L V8, 2.7L turbo, 6.6L Duramax), assembly plant, model year, body class, and recall history pulled live from NHTSA, but it cannot return the original sticker options. For those, the RPO label (a sticker in the glovebox or center console listing the three-character option codes) is the fastest source, and a GMC dealer can print the full build sheet from the VIN through GM's service system. CheckMyVIN never claims options data it cannot verify against the NHTSA record.
GMC VIN decoder FAQ
Is the GMC VIN decoder free?
Yes — every GMC VIN lookup on CheckMyVIN is free, with no signup, no email gate, and no usage cap on individual users. Data comes from the public NHTSA VPIC API. The optional "full vehicle history report" link at the bottom of each report is an affiliate to a paid third-party history service; you can ignore it. Whether you search "GMC VIN decoder", "GMC truck VIN decoder", or "GMC VIN number lookup", this is the same free tool.
How do I read a GMC VIN (Sierra, Canyon, Yukon, Acadia)?
A GMC VIN is 17 characters: position 1 is the country (1 = USA, 2 = Canada, 3 = Mexico), positions 2-3 are the GMC WMI (1GT light truck, 1GK SUV, 1GD heavy-duty), position 10 is the model year (M = 2021, see the year table on this page), and position 11 is the assembly plant. Enter the VIN above and CheckMyVIN reads every field via the official NHTSA database — it covers the full GMC lineup including Sierra 1500/2500/3500, Canyon, Yukon, Yukon XL, Acadia, Terrain, Savana, and the Hummer EV.
Where is the VIN located on a GMC?
Three places on every modern GMC: the dash plate at the base of the windshield (visible from outside, driver side), the driver-door jamb certification sticker, and on the title / registration. GMC trucks (Sierra, Canyon) ALSO have the VIN stamped on the frame rail — useful when the dash plate on an older truck is damaged or missing.
How do I find my GMC engine or RPO code from the VIN?
The engine family appears in the VPIC "Engine Model" field (e.g. L84 5.3L V8, L87 6.2L V8, L3B 2.7L turbo, L5P 6.6L Duramax diesel) — enter the VIN above and read the Vehicle Specifications block. The full list of three-character GM RPO codes (which spell out every factory option, axle ratio, and paint code) is NOT encoded in the VIN: it lives on the RPO label in the glovebox or center console. A decoder that claims to expand all RPO codes "from the VIN" is guessing — the VIN gives the engine and platform, the RPO label gives the option list.
Can I find my GMC paint code from the VIN?
No — paint code is not part of the federal NHTSA VPIC dataset, and it is not encoded in the 17 VIN characters. The right place to look is the RPO label (glovebox or center console): the paint code is a U-series RPO (for example GAZ = Summit White). A GMC dealer can also pull it from the VIN. CheckMyVIN will never invent a paint code from VIN characters — the field simply isn't there.
Can I get the GMC window sticker or build sheet by VIN?
The original window sticker (Monroney label) and full build sheet are not in the NHTSA VPIC data, so CheckMyVIN does not reproduce them. What the VIN does give you — engine, plant, model year, body class, drive type, and open recalls — appears free in the report above. For the original Monroney or the option list (including Denali and AT4 packages), a GMC dealer can print the build sheet from the VIN through GM's service system; the RPO label in the vehicle is the fastest free option for the option codes.
Can I check GMC recalls with the VIN?
Yes. CheckMyVIN automatically queries the NHTSA recall API alongside the decode and shows every open campaign for the year/model/make combination. Worked examples — including the 2019-2020 Sierra 1500 battery-cable stall campaign and a 2019-2021 Sierra / Yukon seat-belt-bracket campaign — appear on the /gmc/recall page with the official NHTSA campaign numbers and links to the NHTSA recall portal so you can verify.
Is this a GM VIN decoder too?
Effectively, yes — GMC, Chevrolet, Cadillac, and Buick are all General Motors divisions and share GM's WMI and VIN structure, so the same decode logic applies to any of them. Enter your VIN above and CheckMyVIN reads the same NHTSA VPIC fields regardless of which GM division built the vehicle; select your specific GM division for model-specific details. There is no single "GM" decoder page because GM is the parent company, not a vehicle marque — the WMI in positions 1-3 identifies which division (1GT GMC, 1GC Chevrolet truck, 1G6 Cadillac) built it.