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Numbers stamped onto frame rail '71 Blazer

Joe Blaze

1/2 ton status
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can anyone advise what the numbers stamped in the side of the frame rail just under the drivers side floor area mean? i just saw them today while i was under there. The last digits almost look like a date.

CIMG4333Medium.jpg
 
can anyone advise what the numbers stamped in the side of the frame rail just under the drivers side floor area mean? i just saw them today while i was under there. The last digits almost look like a date.

CIMG4333Medium.jpg


just guessing but I think first 7 digits are part #, then perhaps the frame manufacturers sequence numbers. Not all GM frames were made by GM.
 
Both of my 71 and 72 K5's and a 71 GMC K1500 I had all had those numbers on the passenger side frame rail..they are part numbers,not a date code or a VIN --the VIN may be stamped farther forward on the upper "lip" of the frame above the passenger side spring shakle...

Gee,I wish I lived where you can still see numbers on a 1971 frame rail!...every frame that old here is lucky to be half of its original thickness,and all the numbers rotted off 15-20 years ago!...
 
Here are mine from a '72 frame rail.... don't think they are VIN-related

DSC02128-1.jpg




:usaflag:
 
frame numbers

I worked at A.O.Smith for 34 years and we made most of the Blazer frames
It is not a VIN number --Part of it is the gm part number and some of it is a
frame build date number--but it't been a long time ago and I don't recall how we coded them and some of it is for tracking the frame if there was a recall because of bad steel ect.
Every light truck up to semi truck frame rails we made had numbers stamped on them.
The bad news is A.O.Smith was sold and the company that bought them parted out and sold or scraped all tooling--dies--presses--ect.
So 100 years of making frames came to an end and any records and paper work has been hauled to the land fill.
It died a slow death under the new owners from 1997 to 2005--And that part of Milwaukee now looks like Motown
 
Hey Bill.... good to have you here.

It's always cool to hear stories from people who were directly involved with these trucks when they were being built new.

I moved your other manifold thread to "The Garage" for you where it should get more views and hopefully better responses.

"The Driveway" forum is for complete truck rebuilds. You'll notice each thread there is it's own vehicle / owner and it allows people to document the complete build process and ask specific questions about their build. Also, it allows guys with similar trucks to subscribe to the builds that are most similar to their own.... it's a great way to get new ideas and tips.


:usaflag:
 
I worked at A.O.Smith for 34 years and we made most of the Blazer frames
It is not a VIN number --Part of it is the gm part number and some of it is a
frame build date number--but it't been a long time ago and I don't recall how we coded them and some of it is for tracking the frame if there was a recall because of bad steel ect.
Every light truck up to semi truck frame rails we made had numbers stamped on them.
The bad news is A.O.Smith was sold and the company that bought them parted out and sold or scraped all tooling--dies--presses--ect.
So 100 years of making frames came to an end and any records and paper work has been hauled to the land fill.
It died a slow death under the new owners from 1997 to 2005--And that part of Milwaukee now looks like Motown

GOOD to know Bill, I recognize the part #, but as you mentioned if it was a vendor to GM, it could have an unrecognizable set of numbers from what most are used to looking at (GM stampings) consider the BOM numbers on Dana axles for instance....they don't follow GM patterns for part #'s or date codes.
 
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