spot weld inspector mark?????

[CKfan]

Never noticed these before (that I recall).

A couple weeks ago I removed the old seam sealer from the roof drip rail just above the passenger side windshield area and noticed a "32" stamped over the top of a spot weld (didn't take picture at the time). Upon seeing this, I just assumed someone at the factory counted the number of spot welds in that particular area and stamped "32" ????. But yesterday while marking any areas that still needed some body work, I noticed in the rear of the cab, center bottom, there was also a "32" stamped on top of a spot weld. This leads me to believe maybe someone had to mark that they inspected the spot welds??????
I looked the rest of the cab over but found no other such numbers.

I did find an oddly placed stamp on the driver's side cab floor which does not correspond with a part number or vin number or model number. The stamping is "23420."

Just found these markings interesting , I hope someone else does also

[Lee H]

I found a hand full of those when my truck came back from soda blasting, have no idea what they are.

[CKfan]

It is little things like these that keep me interested in the hobby. Not worth noting to some but interesting to others : )

[402Bowtie]

I'm pretty certain the two-digit numbers refer to the week the part was stamped. I've never seen a number greater than 52.

[mr.mud1]

i'll have to look more closely at my truck tomorrow but i do know there's a 2-digit number stamped on the inside,drivers side of the tailgate near the bottom,interesting

[CKfan]

Originally Posted by 402Bowtie

I'm pretty certain the two-digit numbers refer to the week the part was stamped. I've never seen a number greater than 52.

In both instances, the number "32" was stamped over the top of a factory spot weld on different parts.

I think you are correct if you are saying the "32" stands for the week the parts were mated together, spot welded together. If so, this would make perfect sense since my truck was completed in Fremont the last week of Aug 1968 and the oldest date coded parts I have found on the truck are Aug 18 1968.

The 32 week of 1968 was: Aug. 5, 1968 Aug. 11, 1968

Thanks for the input 402Bowtie

[hewittca]

I find this sort of thing interesting. I can't help you decipher what these numbers mean because I have no clue. I was curious to see if mine had these as well, and sure enough it does! I have a 10 stamped on the rear of the cab and what looks like a 31310 on the floor under the seat. I don't see any number on the roof but I also still have my factory seam sealer installed.

[Keith Seymore]

I had design/release responsibility for the pickup cab and box on the GMT800, K2 and T1 programs (and full size van underbody, too).

I can state with authority those are date codes.

The fact that they were stamped on or near spotwelds is a coincidence and unrelated.

K

[71CHEVYSHORTBED402]

I like the finer details, and Keith managed to clear things up. We're very lucky to have first hand experience available. Say Keith, I think we've covered this and some remained a mystery, but because I'm old and forget some things, any idea what these numbers mean?

[Keith Seymore]

Originally Posted by 71CHEVYSHORTBED402

I like the finer details, and Keith managed to clear things up. We're very lucky to have first hand experience available. Say Keith, I think we've covered this and some remained a mystery, but because I'm old and forget some things, any idea what these numbers mean?

Is that a sheet metal part, or the side of a frame rail?

K

[71CHEVYSHORTBED402]

Originally Posted by Keith Seymore

Is that a sheet metal part, or the side of a frame rail?

K

RH frame rail's exterior wall. Pretty sure 4-23 is the day code. Makes some sense, a BUNCH of parts on this truck are stamped April for a truck finished May 17th.

[CKfan]

Thanks Keith, great info.

I too, want to know about the frame rail date codes.
I get the part number and 7-15 aligns with a Aug 68 built truck but Can't decipher the the two (35).

[mrein3]

From a thread I started back in 2018:
"On the back of my cab, and on the tailgate are stamped numbers. "39" on the back of the cab and "47" on the tailgate. The font appears to match so I would guess this was some factory marking."
http://67-72chevytrucks.com/vboard/s...d.php?t=767013

[CKfan]

Yep, apparently pretty much on every piece of cab sheet metal I looked at.
While doing dash assembly last night I saw stamps on bottom of the lower inner cowl, outer cowl, cowl panel, kick vent inlet, bottom of dash and on and on.

All 32 or 34 and none higher. Build date truck 8-26-68, 34 week 68 was 8-19 to 8-25-68. (Thank you Kieth for explaining it was a date code)I am chalking this up to the fact I recently started wearing reading glasses when I work.

[68 C10 Driver]

I have the same type of stamp on the back of the cab at the center bottom - stamp is '48'.

Nice to finally know what those are.

[1967GMCC20]

Interesting info, especially checking panels for date codes for originality.