what production number is my car
The letter or number in position 11 indicates the manufacturing plant in which the vehicle was assembled. Each automaker has its own set of plant codes. The last 6 digits (positions 12 through 17) are the production sequence numbers. This is the number each car receives on the assembly line. In the case of our Cadillac ATS, it was the 125,409th car to roll off the assembly line in Lansing, Michigan.