VIN ??? How do they do that?? - Impala Tech
Tag Team De-coding tags & numbers

 
LinkBack Thread Tools
post #1 of 8 (permalink) Old 10-31-2009, 09:06 AM Thread Starter
Member
 
Join Date: Mar 2007
Location: Glendale AZ
Posts: 86
Blog Entries: 2
 
VIN ??? How do they do that??

Hey Big Dave I have a question regarding assigned VIN's when a car is built. First, can you tell me how chevy or any car company does this when they have many plants building many cars a day and no two cars can have the same VIN?

Second, "68 custom's" car is 409 cars off from mine in the St Louis Assembly Plant numbering system. His last 6 digits of his vin are 4,069 numbers off of mine. Why is that?

My car was built the second week of November '67 11B. His is 11C.

'68 Custom's VIN *****8s149420 11C
My '68's VIN *****8s145351 11B

Custom Coupe, 396, 700R4, 3.73 posi.

Last edited by 68impalacustom396; 10-31-2009 at 08:11 PM.
68impalacustom396 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 10-31-2009, 01:11 PM
Senior Member
 
Join Date: Mar 2008
Location: Minnesota
Posts: 664
 
Chevrolet included a plant dsignation in each VIN so this eliminates any chance of duplicate VIN's. The VIN includes the model code, year, assembly plant and then the sequence. The sequence is a sequential vehicle number for each plant, so there might be ( most probably there is) another car with your sequence but it will not have the "s" in the VIN and likely the model would be different.

I'm not sure what you mean by "assembly plant numbering system". But if this is a body number from your cowl tag those are specific to a model type versus the VIN which is sequential with all models built at that plant.
Fossil_Fuel is offline  
post #3 of 8 (permalink) Old 10-31-2009, 03:14 PM Thread Starter
Member
 
Join Date: Mar 2007
Location: Glendale AZ
Posts: 86
Blog Entries: 2
 
Sweet

Thanks Fossil. The Assembly Plant Numbering System phrase was just lack of a better term for me. You called it the sequence number which answered my question exactly.

Custom Coupe, 396, 700R4, 3.73 posi.
68impalacustom396 is offline  
 
post #4 of 8 (permalink) Old 10-31-2009, 03:40 PM
Senior Member
 
Join Date: Mar 2008
Location: Minnesota
Posts: 664
 
I did not know where you found his car was "409" off from yours. I though maybe you were referring to the cowl tag body number, maybe it was a typo for your 4069 off in the VIN. Anyway 409 is a good number for us impala fans where ever it came from!

Also the first digit (a "1") in your case is a filler and not really part of the sequential number. Your car was the 45,351 vehicle off the st louis line for the 1967 model year.
Fossil_Fuel is offline  
post #5 of 8 (permalink) Old 10-31-2009, 06:56 PM Thread Starter
Member
 
Join Date: Mar 2007
Location: Glendale AZ
Posts: 86
Blog Entries: 2
 
confusing?????????

Here's my cowl plate info
11B B
ST 68-16447 STL 007611 BODY
TR 820-24 D-D PAINT
and nothing else
my VIN *****8s145351
HIS
11C G
ST 68-16447 STL 008020 BODY
TR 833 G-2 PAINT
his VIN *****8s149420
See how close these cars were to each other on the assembly line. STL 007611 minu STL 008020 equals 409 unless i counted wrong. 11B is sec week November '67 and 11C is third week November '67. Yet, the last 6 of the VIN's are 4069 numbers apart.

My original question is why are the sequences closer to each other and the VIN's far apart? Suppose it could be error. What do you think?

Custom Coupe, 396, 700R4, 3.73 posi.

Last edited by 68impalacustom396; 10-31-2009 at 08:12 PM. Reason: not double checking wording
68impalacustom396 is offline  
post #6 of 8 (permalink) Old 11-01-2009, 01:28 AM
Senior Member
 
Join Date: Mar 2008
Location: Minnesota
Posts: 664
 
That is what I though you might be inferring but I was not sure. No I do not think this is a mistake.

16447 is the model code for a 68 2 dr Sport Coupe Caprice with a V8 engine. The 2 cars ( really the 2 bodies) mentioned were built 409 apart if you only consider "16447" body styles but were built 4069 cars apart if you consider all the different body styles that came out of St. Louis in those few weeks.

For example in the 2 week period ( approx) from 11B to 11C they made 409 2dr Spt Cpe 8 cyl Caprices but they made 4069 Chevrolets.

This is normal since St. louis probably made lots of 4 door cars, six cylinder cars, etc during the same period and they would not be counted on the cowl tag sequence but they would roll the VIN.

Does this make sense?
Fossil_Fuel is offline  
post #7 of 8 (permalink) Old 11-01-2009, 11:12 AM
Moderator
 
Join Date: Jan 2006
Posts: 12,458
 
Fisher body builds the car body which like a motor is shipped to the assembly plant (unless the Fisher body plant is adjacent on the same lot) and then everything comes together as a finished car on the line. Because Fisher body is a separate company (even though everybody ate in the same lunchroom) they have their own sequence numbers, which were different and bear no relation to the VIN. In some cases the Fisher body shipped the body in white by rail to a plant in another state so it often was built with the intended motor being what was on the build sheet at the time it was welded together. At the assembly plant orders often changed by the dealer so a V-8 car according to the trim tag from Fisher body may just as likely been built with a six cylinder (or reversed) when it came time to be mated to the rest of the car. The VIN was the last piece to go on the car and trumps a trim tag for that reason; but keep in mind that these were hand typed by a stenographer reading off a type written page as these cars were built often before the age of computers (which came on line in the late sixties for a company like GM and not until the mid eighties for smaller companies supplying parts) so typos still occur.

Big Dave
Big Dave is offline  
post #8 of 8 (permalink) Old 11-01-2009, 07:26 PM Thread Starter
Member
 
Join Date: Mar 2007
Location: Glendale AZ
Posts: 86
Blog Entries: 2
 
Thanks for the info.

Nice info guys. I like. I learned some more stuff about these situations which I find to be interesting. I wish I was building Impalas in the '60's.

Custom Coupe, 396, 700R4, 3.73 posi.
68impalacustom396 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Impala Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome