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Old 11-22-2020, 07:24 PM   #1
Carl Spangler
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Help decoding seatbelt date code

Greets

Can someone help me decode the following seatbelt date code from my 1971 C10: 52K70. Looks like 1970 but is the 52 the week # and what is the K?

I'm trying to narrow down the build month of my truck. There are a couple threads listing some date codes and S/N's. Unfortunately, the corner of the blue door decal on my truck is damaged. I looked behind the seat but the build sheet isn't there.

From previous 67-72chevytrucks threads:

Z602191 8/70

Z622515 my truck looks like it could be Dec 1970

Z641136 4/71
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Old 11-22-2020, 07:41 PM   #2
geunther
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Re: Help decoding seatbelt date code

I believe K is the plant code. Correct, 52 is the week number. My belts varied from the 52 week of 71 to the 2 week of 72, for a January build date for the truck.

I checked all the date codes on my truck when I got it, glass, engine, tranny, differential, alternator, seat belts, mirrors etc. I was wanting to know the originality. But, I did know the build month of the truck so I had that advantage. I would grab all the date codes you can. If they are after your truck year, obviously they are replacements. Dates for the year of your truck could also be replacements but you start to look at the totality of the circumstances.

Last edited by geunther; 11-22-2020 at 07:50 PM.
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Old 11-22-2020, 07:52 PM   #3
Carl Spangler
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Re: Help decoding seatbelt date code

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Originally Posted by geunther View Post
I believe K is the plant code. Correct, 52 is the week number. My belts varied from the 52 week of 71 to the 2 week of 72, for a January build date for the truck.
Thanks for the info on the belts and your truck build.
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Old 11-22-2020, 08:00 PM   #4
geunther
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Re: Help decoding seatbelt date code

My pleasure. I also did not have my build sheet to get the exact build date. So I did what you are doing. Closest I could get was an 11 day window (Jan 20 to Jan 31, 1972). My pseudo build thread documented what I did if you would find it helpful.
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Old 11-22-2020, 08:35 PM   #5
Carl Spangler
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Re: Help decoding seatbelt date code

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Originally Posted by geunther View Post
My pleasure. I also did not have my build sheet to get the exact build date. So I did what you are doing. Closest I could get was an 11 day window (Jan 20 to Jan 31, 1972). My pseudo build thread documented what I did if you would find it helpful.
Post a link here to your build thread please.

thanks again
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