One for the forum GURU's

[Grumpy old man]

One of my 67's swb has a vin ending in 102500 (not exact ) how low is this on the low vin scale and what was total production of the 67-72 model shortbeds ?

[Keith Seymore]

Originally Posted by Grumpy old man

One of my 67's swb has a vin ending in 102500 (not exact ) how low is this on the low vin scale and what was total production of the 67-72 model shortbeds ?

a) Not terribly low, when compared to 0001...

b) Keep in mind there were several assembly plants producing pickup trucks, each with it's own VIN sequence.

Said differently, there would be several vehicles (with different VIN pre-fixes) ending in 1025xx

K

[Grumpy old man]

Well that would raise it up there now wouldn't it ?

[Keith Seymore]

Originally Posted by Grumpy old man

Well that would raise it up there now wouldn't it ?

Well - the point is not just the 10 vehicles with the number 102500 specifically (one from each plant), but the preceding 102499 vehicles prior from each plant as well.

So that makes it one of the first (10 x 102499 = ) 1,025,000th vehicles produced for that model year!



K

[Grumpy old man]

Don't the serial numbers start at 100001 which would make it

10x2500= 25,000 ?

1967 production being 43,940 =4390 per assembly plant

and with total short bed fleet production 67-72 being 257,848

I hate math that's why I asked

so it's just a mid number for that Flint factory year

[Roland]

Yeah, I understand that 4 out of 3 people have trouble with math.

[Keith Seymore]

Originally Posted by Grumpy old man

Don't the serial numbers start at 100001 which would make it

10x2500= 25,000 ?

1967 production being 43,940 =4390 per assembly plant

and with total short bed fleet production 67-72 being 257,848

I hate math that's why I asked

so it's just a mid number for that Flint factory year

Yes - you are probably correct. I messed up the "starting at 100001" part. Got in too big a hurry.

Also - during my day - GMCs started at 500001 and incremented up in their own separate VIN sequence. So they would have been added into the mix too. I think you'll find that was the case with some of the earlier model years as well.

K

[67 cst swb]

Originally Posted by Roland

Yeah, I understand that 4 out of 3 people have trouble with math.

That's hilarious!

[SS Tim]

There were different start numbers for the VIN range depending on the year and plant. Concurrent runs for Chevy and GMC or different lines in the same plant using different start numbers. Each sequence was plant specific but included all light duty conventionals built at that plant or line for a given MY. So K5 to C30 plus IIRC Suburbans and Panel trucks used the same sequence for a given plant or year.
Since each plant had varied production of models it is incorrect to say X number were built at a specific plant based on population totals. As I have said before all the published production data I've seen is suspect and rife with typos.


But coming back to the OP's original question, your example would be the 2500th conventional cab, light duty truck truck produced at that plant (or line), that year, intended for sale.

Your "total SWB production 67-72" also begs the question on how do you want to break it out.

After all that covers eight Chevy pickup model numbers per plant per year.
CS10703, CS10734, CE10703, CE10734, KS10703, KS10734, KE10703 and KE10734. Not to mention the GMC models that also included a seperate model number for V-6 trucks as applicable. Nor does it include any swb chassis cabs for either brand that may now be converted to pickups.

I'm sure Bruceman1968 will drop in and tune this up more later.

[bruceman1968]

Grumpy, the 100,001 sequence number doesn't apply just to short beds. Looks like the production numbers you quoted are for short beds. The sequence number is for any truck long or short or other. So you have truck 2500 to be assigned a build sequence number at flint in 1967. Flint could produce roughly 90,000 trucks a year, on the main line. And they had a second line also. Your 2500 number is pretty low, compared to 90,000. A good way to narrow down when your truck was built, is the numbers on the engine. The engine ID will give you the month and day of the year the engine was assembled and the date code will give you the year. With the engine date known, just add travel time and truck assembly time( usually a few days or weeks) and you got a estimation of when your truck was built. Your 1967 model was probably built in late 1966.

Keith, Your right about the GMC's. In 1972 Chevy vins and GMC vins got in sink with each other. 1972 Chevys sequence numbers started with 100001, 1972 GMC's with 500,001. The VIN's were the same 13 digit format, A "C" for Chevy or a "T" for GMC was added to the 12 digit Chevy format, at the beginning to denote Chevy/GMC
Build Sequence numbers for 67-72 Chevy/GMC
1967 Chevy starts with 100001..... 1967 GMC with 1001...(USA)
1968-69 Chevy 100001.................1968-69 GMC with 10001...(USA)
1970 Chevy 100001......................1970 GMC with 50001...(USA)
1971 Chevy Starts with 600001......1971 GMC with 10001...(USA)
1972 Chevy Starts with 100001......1972 GMC with 500001...(USA and Canada)
800001 was possiable at any assy. plant with a second line.
1967-70 GMC Canada started with 100001 same as the chevys
1971 GMC Canada started with 600001 same as the Chevys
1972 Chevy USA or Canada starts with 100001. GMC USA or Canada starts with 500001. And the VIN's all used the same 13 digit format.
This list still isn't complete, I have seen some sequence numbers that start at 300001, 400001 and 700001 from different plants for different years(67-72).

Grumpy, another thing about the Build Sequence number found in the VIN, from the time the number was assigned, to the end of the line, if any shuffling occurred, then the build sequence number would not reflect the actual number order produced.

It's a mess, but hope it helps. Can you get the numbers off the engine.(ID and date code) Is the engine original to the truck?

EDIT: Tim you beat me to it.

[Keith Seymore]

Thanks Tim and Bruceman; it IS a mess -

Originally Posted by bruceman1968

Grumpy, another thing about the Build Sequence number found in the VIN, from the time the number was assigned, to the end of the line, if any shuffling occurred, then the build sequence number would not reflect the actual number order produced.

Just so you know: in Flint there was a body bank after cab shop and then another after paint. These served mostly as an accumulator (to allow the final line to continue to run in the event of a breakdown upstream - which was often) but would also allow for some shuffling of units based on workload balance, part availability (or lack thereof) or extended repair to a specific unit.

Once the vehicle dropped out of paint and into trim the Final Line build order was pretty well set - other than the most extenutating of circumstances (ie, extreme damage to a vehicle, dropping it off the hoist at body drop, cut in/cut out for engineering builds, etc).

K

[bruceman1968]

Originally Posted by Keith Seymore

Thanks Tim and Bruceman -



Just so you know: in Flint there was a body bank after cab shop and then another after paint. These served mostly as an accumulator (to allow the final line to continue to run in the event of a breakdown upstream - which was often) but would also allow for some shuffling of units based on workload balance, part availability (or lack thereof) or extended repair to a specific unit.

Once the vehicle dropped out of paint and into trim the Final Line build order was pretty well set - other than the most extenutating of circumstances (ie, extreme damage to a vehicle, dropping it off the hoist at body drop, cut in/cut out for engineering builds, etc).

K

Thanks Keith!! Always good to know.

[FirstOwner69]

Bruce...

Since my 69 VIN CE249Z833099 starts with 8 does that mean that my truck was made on a second line at Fremont? Would it have been the 33,099th built on that line or built in Fremont regardless of production line. In 1969, GM told me that my truck was made in mid-Dec. 1968 and all the component dates seem to substantiate that.

[bruceman1968]

Originally Posted by FirstOwner69

Bruce...

Since my 69 VIN CE249Z833099 starts with 8 does that mean that my truck was made on a second line at Fremont? Yes Would it have been the 33,099th built on that line or built in Fremont regardless of production line. regardless In 1969, GM told me that my truck was made in mid-Dec. 1968 and all the component dates seem to substantiate that

Mid Dec sounds about right. I don't know when summer shutdown was for Freemont in 68, but they would start up with 69 models just after. Plus your other componets support mid Dec. 33,000 by mid Dec is doable for a big plant like Freemont.

[SS Tim]

Every Fremont "Z" 69 SPID I have currently filed is in the 800,000 range. The lowest is 804647 and the engine was unfortunately a NOM/replacement IIRC.

The engine date on you POP will give you a close production date. I know you have it I just can't read it! Engine casting dates from the block, heads and intake cross confirm. Plus we could compare the numbers on the trans and rear axle housing but those are much broader a timeline.