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311858 is the number <br/>And has funny little squares before and after the number
What is the date (month/year) on the door Certification Label. The number is likely a date code with shift information also for quality control efforts. The "funny little" (your words) are likely the vendor identifier for the subassembly. Your car is an '88 so I doubt the Julian would be the 311 sequence that it begins with but more likely the 185 which would be still very late in '88 production. '88 being a Leap Year 185 would make it maybe July 3. Your mo/year would maybe make or break that theory.
I also doubt maybe that they're intended to be "ones" but maybe // - so the mo/year will maybe help sort that.
You might likely stumble across several similar in other areas, you might stumble across messages, dates etc. done in "tire crayon" also. There's also VIN identifiers that could be used in the case of documenting authenticity of the build by law enforcement.
...the number is likely a date code with shift information...
just check both my 85 and 90, and I don't seem to have any identifiers at that location, but then again, I haven't removed any paint either. with WV, most likely some date code or manufacturing info.
as a side note, on my 85, I removed the front fender liner, LH aft, and the vin number is stamped into the frame member in that location -
I saw the number and sanded a bit more to read it
Got me worried for a min thinking the vin number didn't match
Lol
Thank again guys
Check the same part on the other side of the car for similar information. If there's none then it could be information regarding the entire "subassembly" side to side.
Would love to no what the symbol means either side of the numbers
at first I thought it might be "geometric dimensioning and tolerancing." the first symbol, "position" and the (two) "back slash" symbols, parallelism, but the first symbol is not the standard GD&T symbol - the second is standard. as a mater of fact, I have never seen those identifiers on parts only engineering drawings. the numbering system doesn't make sense either, so it's not GD&T, but it might be some type of manufacturing info.
Manufacturing number for sub assembly with tolerance
- I would also think those latch housings would need to be symmetrical and parallel to the cars CL - ??? we could second guess this all day 'til we're blue in the face, and not resolve anything. the more I look at it, the more I'm convinced it's NOT any kind of date coding.
: the more I'm convinced it's NOT any kind of date coding.
I was quite convinced of that before I posted the first time, also the reason I asked for the build information from the door. That I would say confirmed it a few posts ago.
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
I have a friend who works with Gordon Killebrew on some projects. I will send this post to him and see if I can get an answer. Gordon knows everything.
It could be a body shop sequence number. These are done to keep the job sraight in ghe body shop. The sequencing sometimes gets messed up in paint and the VIN number isn't assigned until the job is sent to General Assembly. Most GM plants are like that.
I wish I could see the bottom box with the cross hairs better. I believe the better the cross hairs are centered the better the specs are. The top one looks good.
It could be a body shop sequence number. These are done to keep the job sraight in ghe body shop. The sequencing sometimes gets messed up in paint and the VIN number isn't assigned until the job is sent to General Assembly. Most GM plants are like that.
you may be on to something - "body shop" number or a "job" which is independent of the VIN. from what I remember, it was a three digit number, starting with 001 and thru 999. I wonder if the OP has seen any hand written numbers (#858) elsewhere on the car. gawd, I love stuff like this...
It could be a body shop sequence number. These are done to keep the job sraight in ghe body shop. The sequencing sometimes gets messed up in paint and the VIN number isn't assigned until the job is sent to General Assembly. Most GM plants are like that.
It could be a body shop sequence number. These are done to keep the job sraight in ghe body shop. The sequencing sometimes gets messed up in paint and the VIN number isn't assigned until the job is sent to General Assembly. Most GM plants are like that.
The VIN has the body style (coupe or convertible) as the 6th digit (2-coupe or 3-convertible. So the VIN has to match the frame as it's being built especially with the last 8 digits of the VIN being stamped on the frame below where the battery sits. I believe the full VIN is also stamped on the right rear of the frame near where the dogbones attach to the frame kick-up.
Weren't the C4 frames built at the Bowling Green Assembly Plant? I would expect that frames would be built only when the job sequence number was assigned and the car was actually scheduled to be built.
The build sheet for my '87 shows a julian date of 87-117 (April 27th) as the day the job sequence number was created and the car started down the assembly line on May 11th.
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What's this number ?
with WV, most likely some date code or manufacturing info. 
