First count the characters. 11 is Ford (1965-80). 12 is a 1967-72 Chevy/GMC pickup. 13 is a GM passenger car, a 1968+ Mopar, an AMC, or a 1973+ Chevy/GMC truck. Then click through to the marque-specific decoder page on this site — Classic Ford VIN Decoder, Classic Chevy VIN Decoder, Classic Mopar VIN Decoder, or Classic GM VIN Decoder — for the full position-by-position tables. NHTSA cannot decode any pre-1981 VIN; that database only covers the 17-character format from 1981 forward.

Because it can't — pre-1981 VINs pre-date the federal standard the NHTSA database is built on. FMVSS 115, which mandated a common 17-character VIN format across all US-market vehicles, took effect for the 1981 model year. Every car built before then uses a manufacturer-specific format (11 chars for Ford, 13 for GM and Mopar) that was never entered into the NHTSA vPIC database. Use the position tables on the marque-specific decoder pages instead.

It depends on the make and year. Ford 1965-1980: 11 characters. GM passenger cars 1965-1980: 13 characters. GM pickups 1967-72: 12 characters; 1973-80: 13 characters. Chrysler / Dodge / Plymouth 1968-1980: 13 characters. AMC 1966-1980: 13 characters. Federal Motor Vehicle Safety Standard 115 mandated the 17-character format across every US-market car starting with the 1981 model year.

It depends on the year. Through 1967 the VIN was typically on a plate riveted to the driver-side door post, the door jamb, or the driver-side inner fender apron (Fords). From 1968 forward US federal law required the VIN to be visible through the driver-side windshield. On most muscle-era cars the frame or firewall also carries a stamped VIN, and Mopars carry a fender tag with additional build data.

Only partially. NMVTIS (the federal title-branding database) only holds records back to about the mid-1990s in most states — a 1970 Camaro or 1969 Mustang may have generations of ownership that never entered any digital record. What you can do: (1) use the position tables to decode what the car was supposed to be, (2) buy the per-VIN factory report (Marti for Ford, PHS for Pontiac, Govier for Mopar), (3) request a state DMV title history (most states will provide it to the current owner or to a legitimate buyer with the seller's authorization), and (4) cross-check against marque registries. For 1981-and-newer cars, our free 17-character VIN check pulls full NMVTIS-backed history.

On pre-1965 cars these three often refer to different things. The 'VIN' as a modern concept did not exist — cars carried a manufacturer serial number, a body number stamped on the firewall or cowl, and (on some cars) an engine number. From 1965 onward the manufacturers converged on what we call the VIN, but each still stamped additional identifying numbers on the body, engine, and transmission. A properly documented classic has ALL of those numbers in agreement.

Yes. Every 1981-and-newer US-market vehicle carries the 17-character VIN mandated by FMVSS 115, and we decode those free through our NHTSA-backed lookup. Third-gen Camaros, Fox-body Mustangs, C4/C5/C6 Corvettes, Grand Nationals, and every modern-classic car decodes instantly — visit the classic VIN check page.

It depends on the marque. For Ford (1967+): Marti Auto Works — the only company licensed by Ford to sell per-VIN reports from the surviving production database. For Pontiac (1961-1986): Pontiac Historical Services. For Chrysler / Dodge / Plymouth muscle: Galen Govier and the Chrysler Registry. For Corvette: NCRS (National Corvette Restorers Society). For Shelby: SAAC (Shelby American Automobile Club). For high-value Buick GSX / Stage 1: Buick Gran Sport Club of America. Each service has its own price tier, but on any six-figure muscle car the appropriate authentication is standard-of-care due diligence.