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Originally Posted by 71CHEVYSHORTBED402
Interesting. Sounds like the VIN's serial number is simply a number assigned to the vehicle, by some rational consecutive order,
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Yes. VINS can start at 1001, 10001, 100001, 500001, 600001 or 800001 and increment up one by one from there. If a plant uses multiple VIN sequences (like one set for Chevy and one set for GMC) they would increment up independent from one another. For a Chevrolet truck built in Fremont for the 1971 model year the VIN started at 100001.
Quote:
Originally Posted by 71CHEVYSHORTBED402
which if I'm not mistaken, that number is assigned beginning with the frame rail. LH rail to be exact, though can only speak for a 1971.
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No - it's assigned long before that; Prior to when the build sheet(s) are broadcast to the shop floor. The body build starts days before the frame line, so it is going to appear on the cab well before it is stamped on the frame rail.
Quote:
Originally Posted by 71CHEVYSHORTBED402
Question, here's my build sheet for example, Fremont Plant, sequence 24419. Are you saying it's the 24,419th 1971 truck run through the Fremont Plant?
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Maybe. That's a pretty small number for a truck that was built in May of 1971.
At an absolute minimum Fremont would have easily built 120,000 trucks between September of 1970 and May of 1971, assuming 45 jobs/hour and 2 shifts production. At 100 jobs/hour, 3 shifts and some overtime you are at 400,000 built. If I am reading your VIN right it is 1Z6xxxxx, which would indicate around 500,000 trucks built.
I wouldn't be surprised if it was 224,419 or 324,419 or even more likely 524,219 (even if only the 24419 digits appear on the sheet). In any case you might look around and see if you see "19" or "419" marked on any of the components.
K