A GMC Sierra HD VIN opens with 1GT (the United States). Position 11, the plant, reads F; a 2026 Sierra HD carries T in position 10. Decoding one also brings up 0 recall campaigns and 1 owner complaints from NHTSA.
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How to read a GMC Sierra HD VIN
Here is a real 2027 GMC Sierra HD VIN from our database, split into its parts:
VIN 1GT4UZER6VF100173 — 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 GMC Sierra HD VINs say the car was built
The first three characters are the World Manufacturer Identifier. Across 210 GMC Sierra HD 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 |
|---|---|---|---|---|
| 1GT | United States | — | 203 | |
| 1GD | United States | — | 7 |
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 GMC Sierra HD
Position 10 carries the model year, skipping I, O, Q, U and Z. The alphabet comes round every 30 years, which the GMC Sierra HD has not yet outlived: its 6 years still map one-to-one. All 6 model years of the GMC Sierra HD, 2019 to 2026, with the character each one carries:
| Model year | VIN character (position 10) | Same character as |
|---|---|---|
| 2026 | T | — |
| 2025 | S | — |
| 2024 | R | — |
| 2023 | P | — |
| 2022 | N | — |
| 2019 | K | — |
Body and engine characters we see on GMC Sierra HD VINs
Positions 4–8 are the maker's own build code. Across 210 VINs the GMC Sierra HD uses 11 different characters in positions 4, 5 and 8:
| Position | Characters seen on real VINs | Variety |
|---|---|---|
| 4 — body | 4 (85%) · 1 (11%) · 5 (2%) · 3 (1%) | 4 distinct |
| 5 — series | 9 (48%) · U (46%) · 2 (6%) | 3 distinct |
| 8 — engine | Y (77%) · 7 (21%) · G (1%) · R (0%) | 4 distinct |
What a decoded GMC Sierra HD VIN gets you
Behind a GMC Sierra HD VIN: 1 owner complaints and every recall campaign NHTSA has on record:
| Data | For this model | Source |
|---|---|---|
| Owner complaints | 1 filed | NHTSA |
| Model years covered | 6 years | ForCar catalog |
Where to find the VIN on a GMC Sierra HD
A GMC Sierra HD VIN normally opens with 1GT; the full number sits in four places, and all four must match.
| 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 tire 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 |
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Frequently asked questions
Is this GMC Sierra HD VIN decoder free?
Yes, with no account. Besides the year, plant and build characters it shows the recalls and 1 owner complaints NHTSA holds on the GMC Sierra HD.
What year is my Sierra HD by its VIN?
Read position 10: a 2026 Sierra HD carries T, a 2025 Sierra HD carries S, a 2024 Sierra HD carries R.
Where was my Sierra HD built?
Position 11 names the plant. Across 1 dated GMC Sierra HD VINs it reads F 100%.
What does position 4 mean on a GMC Sierra HD VIN?
It is part of the maker's own build code, so read it against this model, not a generic chart. On 210 GMC Sierra HD VINs here, 4 is the most common character in position 4, on 85% of them.
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