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Looking for the VIN?
Here is where you'll find it:
A vehicle identification number (VIN) is the 17-character code used to identify one specific vehicle. Since the 1981 model year, every VIN issued in the United States has followed the format set by the National Highway Traffic Safety Administration (NHTSA) in 49 CFR Part 565: capital letters and digits, never I, O or Q.
A GMC VIN decoder reads what General Motors (GM) encoded in those characters: the model year, vehicle type, model, engine, restraint system, assembly plant and serial number. For a GMC truck VIN decoder that is the factory identity of the vehicle; the vehicle history report adds what happened to it afterwards.
Checking the VIN before you buy a used GMC lets you compare the vehicle with its title, registration, seller description and service documents. A difference between these records means a wrong listing, a replaced part or a VIN problem, and each of the three is a reason to stop and ask.
Enter the vehicle’s identification number into the decoder to retrieve available specifications and vehicle details. Before running the search, verify that all characters were entered correctly and that the VIN shown on the vehicle matches the title or registration.
The same 17 characters cover every GMC model line, from the GMC Sierra 1500 to the GMC Yukon and the GMC Terrain; open the model page for the codes that apply to it.
The GMC VIN is stamped on a metal plate at the lower driver's side corner of the dashboard, readable through the windshield from outside the vehicle. Locate it in two more places as well, and the same 17 characters should read identically in all three:
Compare the vehicle's VIN in at least two of the three locations before you pay for a used GMC. The dashboard plate, the door label and the title must match character for character, and a mismatch is the one finding that ends the deal on the spot.
Our GMC VIN decoder draws on 9,950,183 GMC records, and 14.6% of them carry at least one problem in their history, against a 20.7% median for makes of comparable fleet age. The fleet is 10.3 years old on average, half of it built in 2017 or earlier, with a median last recorded odometer reading of 60,924 miles.
| Indicator | Value |
|---|---|
| GMCs in the database | 9,950,183 |
| Average age | 10.3 years |
| Median model year | 2017 |
| Median last recorded mileage | 60,924 miles |
| Average last recorded mileage | 77,717 miles |
| Average mileage per year | 12,276 miles |
| At least one problem in history | 14.6% |
| Appeared at a salvage auction | 13.8% |
| Salvage title | 8.5% |
| Rebuilt title | 0.1% |
| Odometer rollback | 1.1% |
| Odometer reported as not actual | 1.3% |
| Flood damage | 0.3% |
| Fire damage | 0.4% |
| Hail damage | 0.2% |
| NHTSA recall campaigns per model year, average | 2.08 |
| Listed or sold in more than one state | 13.9% |
| Dated history records per VIN, average | 2.5 |
| Data as of | August 2026 |
Source: EpicVIN Vehicle Data Research
Recall campaigns are counted per model year, not per car: 2.08 on average across the GMC model years in our database, against 2.94 for makes of comparable fleet age. A below-median average still says nothing about the specific truck in front of you, so check its VIN with GM and NHTSA directly; the five campaigns in the next section are the place to start.
| Figure | What it is | What to do about it |
|---|---|---|
| 14.6% | Carry at least one problem record, against a 20.7% median for makes of comparable fleet age | GMC runs six points below its peers here, and that is still one vehicle in seven. The report identifies which record it is: a title brand, a salvage-auction sale, an odometer flag or an open recall, each with its own date. Read that date line before you read the listing. |
| 13.8% | Went through a salvage auction, against a 19.95% median for the same age group; 8.5% carry a salvage title and 0.1% a rebuilt title | The auction lane is where almost every problem record on a GMC starts, and each sale carries photos and a damage estimate. There are about 73 salvage titles for every rebuilt one, so a GMC advertised as repaired usually still carries the salvage brand; read the title line together with the auction sale date. |
| 12,276 miles | Average distance a GMC in our database adds per year; the median last reading is 60,924 miles | A 2017 model, the median year, should be near 110,000 miles by now. Odometer flags are on file for up to 2.4% of these GMCs: 1.1% show a rollback and 1.3% a reading reported as not actual; a reading that drops between two dates in the report is the rollback itself, and a truck far below the yearly average needs service records to explain the gap. Do that arithmetic before the test drive. |
| 48.3% | Pickups, against 47.2% sport utility vehicles (SUVs), 1.9% cargo vans, 0.7% cutaway chassis and 0.5% vans | Two body styles make up 95.5% of the make, and the VIN separates them in the third character: T for a GMC truck, K for a GMC SUV. Position 4 then gives the weight class, which is where a half-ton Sierra 1500 and a one-ton Sierra 3500 part ways before you read the badge. |
| 76.8% | Gasoline, against 11.7% diesel, 5.1% flexible fuel vehicles (FFV) and 0.5% electric | One GMC in eight is a diesel, and position 8 of the VIN, the engine code, is where the decoder confirms the engine type. On a 2020-2022 diesel Sierra or a 2021 diesel Yukon that same code decides whether NHTSA campaign 24V-797 applies. |
| State | Share of GMCs in our database listed or sold there |
|---|---|
| Texas | 10.3% |
| Michigan | 5.4% |
| California | 5.2% |
| Florida | 4.9% |
| Ohio | 4.2% |
10.3% of the GMCs in our database were listed or sold in Texas, and with pickups at 48.3% of the make, a Texas Sierra is the typical listing: read the bed, the hitch and the underside photos in the auction record for signs of work use before you read the mileage. Michigan and Ohio together add another 9.6%, and both salt their winter roads, so on a truck from either state ask for underbody photos as well; the report displays the damage line, not the rust. Flood damage stays low at 0.3%, half the 0.6% median for the same age group, and 13.9% of these GMCs were listed or sold in more than one state, below the 15.6% median, so most of them were listed and sold within a single state; when the report shows a move to another state after a damage record, ask why.
| Damage type | Share of GMCs in our database | What it means |
|---|---|---|
| Collision | 9.5% | The widest label: a bumper scrape and a bent frame both file under it. Judge by the photos and the repair estimate, not by the word. |
| All Over | 0.8% | Damage on several panels at once, typically hail or a multi-point impact, and usually the point where the insurer writes the vehicle off. |
| Mechanical | 0.5% | Sold for an engine or drivetrain fault rather than bodywork. On a 2021-2024 Sierra 1500, Yukon or Yukon XL with the 6.2 L V8, check NHTSA campaign 25V-274 first. |
| Rollover | 0.4% | Roof, pillars and glass on a tall body-on-frame truck or SUV. The one label where a repaired vehicle is the one to walk away from. |
| Fire / Burn | 0.4% | Heat damage to the engine bay or the cabin wiring, the same share as the fire flag in the table above. Ask for the underhood photos. |
Run the GMC VIN decoder and read the damage line before you read the seller's description.
A GMC recall check by VIN is the one step that does not depend on the seller. Five campaigns cover the Sierra 1500, the Yukon, the Acadia and the Terrain, and each one is worth running before the test drive:
| Issue | Models | NHTSA campaign |
|---|---|---|
| Vacuum pump loses braking assist over time: longer stopping distances | 2014-2018 Sierra 1500, 2015-2018 Yukon | 19V-645 (September 2019) |
| Defects in the connecting rod and the crankshaft, the internal parts of the 6.2 L V8: engine failure | 2021-2024 Sierra 1500, Yukon, Yukon XL | 25V-274 (April 2025) |
| Transmission control valve on diesel models: the rear wheels can lock up | 2020-2022 Sierra 1500, 2500, 3500; 2021 Yukon, Yukon XL | 24V-797 (October 2024), with 26V-083 for vehicles repaired incorrectly under it |
| Driver airbag inflator can explode when the airbag deploys | 2014-2017 Acadia | 23V-334 (May 2023) |
| Excessive coating on the rear child seat anchor bars can prevent a child seat from locking in | 2020-2023 Terrain | 23V-339 (May 2023) |
Recall repairs on GMC vehicles are free of charge at a GMC dealer. Enter the VIN at nhtsa.gov/recalls or in the GM Recall Center listed in the resources below to see whether the work is still open; the report on this page lists the campaigns for the specific VIN in the Safety Recalls line.
GMC VINs are 17 characters long, a mix of letters and digits, and split into three sections: the World Manufacturer Identifier (WMI), the Vehicle Descriptor Section (VDS) and the Vehicle Identifier Section (VIS). General Motors assigns a meaning to every position, which is why an accurate GMC VIN decoder chart reads more out of positions 3 to 8 than a generic one does. The sample below, 1GKFK13508R184921, decodes as a 2008 GMC Yukon SL, a four-wheel-drive sport utility vehicle with the 6.0 L V8, built in Arlington, Texas.
GMC trucks built before the 1981 model year carry a 13-digit VIN that predates this format; the decoder on this page and the chart below read the 17-character VIN, and the FAQ covers the 13-digit one.
| Position | Sample | What it encodes |
|---|---|---|
| 1 | 1 | Country of assembly: 1 or 4 is the United States, 2 is Canada, 3 is Mexico. GM builds GMCs in all three countries, and the character is the same on a Sierra and on a Yukon that leave the same plant. |
| 2 | G | Vehicle manufacturer: G is General Motors, which is why a GM VIN decoder and a GMC VIN decoder read this character the same way. Every GMC built since 1981 carries it. |
| 3 | K | Division and vehicle type, the character that tells GM vehicles apart: T is a GMC truck (WMI 1GT), K is a GMC sport utility vehicle (1GK), while Chevrolet trucks and SUVs carry C and N. GMC world manufacturer identifiers registered with NHTSA: 1GT and 1GK for the United States, 2GK for Canada, 3GT for Mexico, with 2GT and 3GK registered to General Motors as well. Together the first three digits name the manufacturer, the division and the country. |
| 4 | F | Gross vehicle weight rating (GVWR) class and brake system. The sample's F is Class 2F, 7,001 to 8,000 lb, with hydraulic brakes. |
| 5 | K | Chassis and drive line on GMC trucks and truck-based SUVs: K is four-wheel drive, C is two-wheel drive. The sample is a K, and the NHTSA decoder reads the same VIN as 4WD. |
| 6-7 | 13 | Series and body style: cab type on a Sierra, series on a Yukon, half-ton against three-quarter-ton and one-ton. The sample's 13 is the 1/2-ton Yukon SL. |
| 8 | 5 | Engine code: displacement, cylinders and fuel. The sample's 5 is the 6.0 L V8, GM engine code LFA; on a 2025 Yukon Denali such as 1GKS2DR86SR321403, position 8 reads 8, the 3.0 L six-cylinder diesel. |
| 9 | 0 | Check digit. It is computed from the other 16 characters with the United States Department of Transportation formula, and a VIN that fails the check was mistyped or altered. |
| 10 | 8 | Model year: 8 is 2008. Digits 1 to 9 stand for 2001 to 2009, then letters from A for 2010 onwards: L is 2020, N 2022, P 2023, R 2024, S 2025 and T 2026, while I, O, Q, U and Z are skipped. |
| 11 | R | Assembly plant: R is Arlington, Texas, on this sample and on a 2025 Yukon Denali such as 1GKS2DR86SR321403. GM assigns its own plant letters, so the same letter means another factory at another manufacturer; the country already sits in the first character. |
| 12-17 | 184921 | Production serial number, the code for this particular vehicle. Digits 10 to 17 together are the last eight digits that parts catalogs and dealer service desks ask for. |
Those 17 characters describe the vehicle as it left Arlington. Everything after that, from the first title to the current odometer reading, lives in the records tied to the VIN, and that is the layer the full report reads. The VIN is the key to both.
Year 2017
Make GMC
Model Terrain
Fuel Type Gasoline
Engine 2.4L LEA - SIDI: Spark Ignited Direct Injection, E85 MAX, ALUM
Made in CANADA
Information associated with a GMC VIN falls into two main categories.
The free VIN lookup on this page reads the first category out of the 17 characters themselves:
A GMC VIN decoder build sheet is that decode plus one label. The VIN gives the model line, body, engine, plant and model year; the Service Parts Identification label in the glove box lists the three-character Regular Production Option (RPO) codes for every factory-installed option, from the axle ratio to the paint color. A GMC dealer can provide the same list by VIN from the General Motors Vehicle Inquiry System (GMVIS), and the decoded specs on this page are the part you can check against it before you ask.
In addition, the full vehicle history report adds the records the 17 characters do not carry:
Every record comes with its date, so the report reads as a timeline: title, odometer, sale, recall, in the order they happened, 2.5 dated records per VIN on average across the make.
EpicVIN combines available VIN-decoded specifications with title records, mileage events, recall information, and auction data to help buyers compare a GMC’s factory identity with its reported history.Alex Black, CMO, EpicVIN
Partly: the VIN carries the model line, body style, engine code, plant and model year, and the decoder rebuilds those in seconds. It does not carry the option packages, the axle ratio or the paint code; those are the three-character RPO codes on the Service Parts Identification label in the glove box, or the dealer's GMVIS printout for the same VIN. Start with the decode: 48.3% of the GMCs in our database are pickups and 47.2% SUVs, and position 3 of the VIN settles which of the two you are looking at before any label does. The label fills in the rest.
Yes: every GMC VIN carries G, for General Motors, in position 2, and the third character is what separates GMC from Chevrolet, Buick and Cadillac. A GM VIN decoder reads T as a GMC truck and K as a GMC SUV, against C and N for Chevrolet, and the WMI 1GT, 1GK, 2GK or 3GT then says which country the vehicle came from. Two-thirds of the GMCs in our database, 66.9%, were assembled in the United States, 23.6% in Mexico and 9.4% in Canada.
With the model-year charts GM published for those years, not with a 17-character decoder. GMC trucks built before the 1981 model year carry 13 characters, because the federal 17-character format in 49 CFR Part 565 starts with the 1981 model year, and the decoder on this page, like the NHTSA decoder, is built for 17. On a pre-1981 GMC, read the plate on the door post and the title together and treat any 13-digit chart as a guide to the year, the series and the plant, not as a history check; the median GMC in our database is a 2017 model, so a 13-digit truck is the exception here, not the rule.
Type the 17 characters into the GMC VIN lookup tool at the top of this page and press the Check Now button. The free VIN lookup returns the model year, model, engine and plant for any of the 9,950,183 GMC records in our database; the full vehicle history report adds title brands, odometer readings, accident and auction records, open recalls and ownership history for the same VIN. That second layer is where 8.5% of these GMCs show a salvage title and up to 2.4% an odometer problem, and no photo in a listing will display either one.
The table in “How to Read a GMC VIN Number” above is the chart: 17 positions, each one read against the sample 1GKFK13508R184921. The short version: positions 1 to 3 are the WMI, and 1GK is a GMC SUV built in the United States; 4 is the weight class, 5 the drive line, 6 and 7 the series, 8 the engine, 9 the check digit, 10 the model year, 11 the plant and 12 to 17 the serial number. Vehicle records are filed against all 17, which is why one wrong character returns another truck's history.
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