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Old 09-22-2015, 03:25 PM   #1
68C15
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Tell me about these firewall markings

I was reading the thread about production lines and something about the markings. What are they and what do they mean. Is there some secret code for reading them? Mine don't match the VIN.
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Old 09-22-2015, 03:46 PM   #2
Keith Seymore
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Re: Tell me about these firewall markings

Post some pics.

Usually they are option codes, or a heads up for downstream workers on paint colors and such.

http://67-72chevytrucks.com/vboard/s...light=sequence

http://67-72chevytrucks.com/vboard/s...light=graffiti

http://67-72chevytrucks.com/vboard/s...light=graffiti

http://67-72chevytrucks.com/vboard/s...light=graffiti

http://67-72chevytrucks.com/vboard/s...light=graffiti

They will not match the VIN. Nobody in the vehicle assembly plant cares about the VIN - everything is keyed off the build sequence (or manifest sequence) number. The build sequence number is an attempt to control the flow of subassemblies into the main line, and keep everything in order.

The VIN is just a part to be installed on that particular build, just like a tune up label, SPID label or Mulroney window sticker.

K
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Old 09-22-2015, 03:49 PM   #3
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Re: Tell me about these firewall markings

My truck happened to be "number 87" -

VIN is HFxxx388.

K





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Last edited by Keith Seymore; 09-22-2015 at 04:31 PM.
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Old 09-28-2015, 06:48 AM   #4
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Re: Tell me about these firewall markings

Quote:
Originally Posted by 68C15 View Post
I was reading the thread about production lines and something about the markings. What are they and what do they mean. Is there some secret code for reading them? Mine don't match the VIN.
Did that answer your question? Other questions?

K
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Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
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Old 09-28-2015, 08:32 AM   #5
68C15
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Re: Tell me about these firewall markings

I'm talking about the ones on top of firewall by wire channel.

There was also some hint of that being related to fixes or some small defect I think
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Old 09-28-2015, 10:01 AM   #6
Keith Seymore
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Re: Tell me about these firewall markings

Quote:
Originally Posted by 68C15 View Post
I'm talking about the ones on top of firewall by wire channel.

There was also some hint of that being related to fixes or some small defect I think
Yah - option content. I've seen model number, engine RPO, trans RPO and brake system option.

Not related to fixes. Repairs are logged on a specific repair ticket and then "bought off" by the repairman (and inspector) by using a hole punch with unique characters (hearts, moons, clovers). The characters can be traced back to the particular repair person or inspector if need be.

The repair tickets are bundled together as the vehicle goes through the build process and then are thrown away once the vehicle is shipped.

Repairs are not normally written on the vehicle itself.

K
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Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

Last edited by Keith Seymore; 09-28-2015 at 10:20 AM.
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Old 09-28-2015, 10:18 AM   #7
Keith Seymore
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Re: Tell me about these firewall markings

One more, related to this list:

http://67-72chevytrucks.com/vboard/s...91#post7318891
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Chevrolet Flint Assembly
1979-1986
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Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
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