World Manufacturer Identifier (positions 1–3)

The first character marks GM's general World Manufacturer Identifier (1G for a US-built General Motors vehicle), and the third character narrows it to the Chevrolet division specifically. A VIN starting with 1G1 is a US-built Chevrolet passenger car, 1GC a US-built Chevrolet truck, and 1GN a US-built Chevrolet SUV. Two Silverados from the same model year can carry different WMIs depending on whether they came from Fort Wayne, Indiana or Silao, Mexico — both meet the same Chevrolet build spec.

CodeMeaning
1G1US-built Chevrolet passenger car (Malibu, Camaro, Corvette)
1GCUS-built Chevrolet truck (Silverado, Colorado)
1GNUS-built Chevrolet SUV (Tahoe, Suburban, Traverse)
2GC / 2GTCanada-built Chevrolet
3GC / 3GNMexico-built Chevrolet (Silao, Guanajuato)

Engine code (position 8)

Position 8 separates Chevrolet's engine families — the difference between a base four-cylinder Equinox and a V8 Silverado, or a naturally aspirated Camaro and a supercharged one. The live decode above always resolves this against the correct model year.

Model year and plant (positions 10–11)

Chevrolet has built vehicles at plants including Fort Wayne, Wentzville, Arlington, Spring Hill, Bowling Green (Corvette) and Silao, Mexico. Position 11 resolves the exact plant for any VIN you decode above.