Originally Posted by bruceman1968 (Post 8553025)

Just for fun check to see if you find any Blazers with a build sequence starting with a 8. Line 2 builds started with 6 and line 1 builds started with 8. (1971 Flint) I'm curious to see if all the Flint blazers were built on line 2 or both lines. I don't have any blazer SPIDs 1971 Flint that the sequence number starts with 8, but you might.

Originally Posted by bruceman1968 (Post 8661278)

Jay, Does the VIN on the door jam(metal plate) have the X?

Originally Posted by 70GM (Post 8662952)

I could use help reading the vin on my 1970 GMC Jimmy. The vin does not seem to match up correctly to the 1970-1971 GMC vin decoder. Any help.is appreciated.

Originally Posted by Austinjay (Post 8662919)

The VIN tag on the cab has the dash. The X must have been a default letter for the dash in the printing system.

Originally Posted by jocko (Post 8687663)

72 Fremont built truck - the last 6 digits would match the last 6 digits of the VIN of the cab plate that was previously on the chassis. If original, it should have front disk brakes.

Originally Posted by GMCPaul (Post 5946594)

KUDOS TO Bruce for a REALLY GREAT JOB!!! I myself spent 1-2 years working on developing this same chart for the VIN's and then became frustrated and set this aside when the business was expanding. My frustrations were caused due to discrepancies I discovered on 67 GMC VIN's used at the Pontiac assembly plant as they appear to be the only assembly plant that used the shortened 7 digit VIN on all 67 models and at the same time I discovered that Canadian VIN's differed and I had no way to double check their info. entirely.
I wish he had reached out sooner to me for help on confirming information on a few things as I collaborated with Bruce very slightly on this project to help him with info I personally had from doing this research and I know for a fact that he has 3-4 years of heavy research to develop this chart. None of this info was readily or easily available prior to now and he did this purely to help other GMC owners to be able to decipher their VIN's easily and accurately so he defiantly deserves our HEARTFELT THANKS!!!


A Tremendous Job Bruce, My hats off to you!!!

Paul @ GMCPauls

Originally Posted by bruceman1968 (Post 8876252)

Ryanz, Yes, because it rolled over after 10,000 trucks were built(for the USA market). Your truck was 10,539 to be assigned a vin number in 1971 at Oshawa for the American market. GMC's built at Oshawa for the Canadian market used the Chevrolet VIN format and used a 9 between the Chassis and Engine codes to denote GMC. They also used 100,001 as a starting number.
But because your truck was going to the USA, it uses the USA GMC format which has a starting number of 10,001. That's 10,001 with the first truck. So 20,539 - 10,000 is 10,539. Thanks for the kind words, Bruce

Originally Posted by bruceman1968 (Post 8876261)

Yes GMC's in general. As far as the serial number is concerned they don't care what type of truck, just if it's a light duty truck or not. 1/2 ton or 3/4 ton, fender side or wide side, v8 or six cylinder. They don't care when issuing the serial number. If it's a light duty truck it gets the next number in the sequence.

Originally Posted by bruceman1968 (Post 8876265)

Yes, Info on the trucks built in Canada can be purchased still. But I doubt it will tell you production numbers. Mostly just how the truck was optioned.
Do you have the sticker on the inside of the glove box door? It will have the options on it.

Originally Posted by Jefro63 (Post 8889038)

Chevrolet and GMC medium and heavy duty trucks, I picked up a 1970 Chevrolet C50 and looking at what I think is a 1973 gmc 5500. Can you decipher the vin#?
CE503-Z124050