The Vehicle Identification Number, or VIN, is more than just a random series of numbers and letters. The VIN on your GMC vehicle, as well as all other vehicles, is more like a code.
Once this code is deciphered, it reveals all of the individual specs for your car or truck. For example, the first three characters in the VIN identify the manufacturer, make and type of vehicle.
The fourth-through-eighth characters reveal more specific attributes, such as weight rating, series and engine. Meanwhile, the remaining characters identify the manufacturing plant and your vehicle’s number in the production process.