factory grease pencil marks?

[NC_John]

I noticed these marks on my truck (70 C-10). I couldn't figure out why someone would have put them on the firewall, especially "blu" (I mean they obviously put it on there AFTER it was painted, right?) but then yesterday I noticed the same number on the inside of the RS fender when I pulled the inner and started thinking.

Are these factory assembly marks? Seems incredible they'd still be this intact after all these years if they are.


If they are factory marks, then I've been spelling her name wrong all along- its "Blu", not "Blue."

[truckdude239]

Yup there factory

[mgkgmc]

Yes these are factory my Gmc has them also.
Posted via Mobile Device

[NC_John]

That's pretty cool and amazing to me that they lasted this long. Guess I better be careful when I clean under the hood (and apparently nobody else ever cleaned under there!)

Thanks guys....

[bruceman1968]

Hey John, As you continue to disassemble your truck, if you find anymore grease pencil markings could you post the pics up in this thread? Keep a eye out for that 902 number. That's probably the last 3 digits of the "job number" of your truck. The BLU is the first time I've seen a color name instead of the code, but I'm sure it's factory. It could be referring to the paint or interior color.

[NC_John]

Originally Posted by bruceman1968

Hey John, As you continue to disassemble your truck, if you find anymore grease pencil markings could you post the pics up in this thread? Keep a eye out for that 902 number. That's probably the last 3 digits of the "job number" of your truck. The BLU is the first time I've seen a color name instead of the code, but I'm sure it's factory. It could be referring to the paint or interior color.

I will! I haven't found anything in the cab yet....

[Keith Seymore]

Originally Posted by bruceman1968

Hey John, As you continue to disassemble your truck, if you find anymore grease pencil markings could you post the pics up in this thread? Keep a eye out for that 902 number. That's probably the last 3 digits of the "job number" of your truck. The BLU is the first time I've seen a color name instead of the code, but I'm sure it's factory. It could be referring to the paint or interior color.

Agree. "902" was the general assembly (trim and final) build sequence number.

You might see it on the hood, rad support, fenders, grille, rear axle, inside the wheels: on anything that was built up remotely and then conveyed to the final line in sequence.

My truck was number "87" (my truck was built on a Monday, btw ).

K

[NC_John]

Originally Posted by Keith Seymore

Agree. "902" was the general assembly (trim and final) build sequence number.

You might see it on the hood, rad support, fenders, grille, rear axle, inside the wheels: on anything that was built up remotely and then conveyed to the final line in sequence.

My truck was number "87" (my truck was built on a Monday, btw ).

K

That's interesting. My truck was taken off the lot in Sept of '70 (by the bill of sale) so unless it sat on the lot for months, its probably not #902 of the production run. Maybe that number for the month it was built? I need to break down the VIN I guess...

This is kinda like ancestry.com for gearheads, eh?

[Bishops Trucks]

Originally Posted by bruceman1968

Hey John, As you continue to disassemble your truck, if you find anymore grease pencil markings could you post the pics up in this thread? Keep a eye out for that 902 number. That's probably the last 3 digits of the "job number" of your truck. The BLU is the first time I've seen a color name instead of the code, but I'm sure it's factory. It could be referring to the paint or interior color.

My truck was from the Freemont plant. It has "215" stamped in the cowl. When I disassembled the truck, I found the "215" on the trans. case, gas tank, and header panel for the bed. My truck is the original ochre/white top, (repainted once) and on my firewall had the factory crown writing that said "Mustard". The interior was saddle but I've since changed it to black.

[RenoKeene]

Great thread!
#214 is in my shop and destined for greatness

[Ol Blue K20]

I don't think the BLU is a color but an inspectors initials my blue truck had ASH or ASK it was real sloppy couldn't tell which it said..

[Orange67]

My 67 still has them. Didn't see any around the fenders when I had them off, but I wasn't looking either. I would like to try and figure out a way to preserve this, even though the original 327 is long gone.

[NC_John]

Originally Posted by Orange67

My 67 still has them. Didn't see any around the fenders when I had them off, but I wasn't looking either. I would like to try and figure out a way to preserve this, even though the original 327 is long gone.

I confirmed yesterday that I still have the original engine and transmission (matched the serial numbers to the protect-o-plate). I don't have a particularly collectible truck (long bed with no cool options) but its still neat.

[Orange67]

I totally agree! Very cool indeed! that is the one thing about my truck, it has factory buckets, and a few other options, but the glove box doesn't look like there was ever a SPID, no residue at all. no protect-o-plate, or build sheet. Just the grease pencil marks on my firewall.

[70c10stepside]

My 67 has em!

[Keith Seymore]

Originally Posted by 70c10stepside

My 67 has em!

Get off the computer and go get some photos!!

(lol)

K

[Steve Hafner]

. . . .

My 70 C-10 has them . . . a "635" job number and the letter "B".

( I've always assumed that the "B" was for the Baltimore Plant )

There "WAS" also an "AIR" on the inside of the right fender.

( The truck does have factory air, so that's probably what that meant )

. . . .

[Keith Seymore]

Originally Posted by Steve Hafner

( I've always assumed that the "B" was for the Baltimore Plant )

Probably not. Assuming it was built in Baltimore it was already "in" Baltimore and there would not be any reason to tell the assembly line workers that. One would hope they already knew where they were...



If that's the original color my guess would be the "B" stands for "Blue".

K

[Steve Hafner]

Originally Posted by Keith Seymore

Probably not. Assuming it was built in Baltimore it was already "in" Baltimore and there would not be any reason to tell the assembly line workers that. One would hope they already knew where they were...



If that's the original color my guess would be the "B" stands for "Blue".

K

It WAS built in Baltimore ( the "B" is in the serial number ).

I thought the same thing about it already being in Baltimore, but it was already BLUE when it was written on the firewall too !!! LOL ( that is the original paint on the firewall ) We'll probably never know for sure.

[sboris]

Had this under the green paint. Matched all the grease marks all over the truck. Looks to be painted on with a brush. Built in Janesville.. 68 cab

[John H.]

Bruce,

here is a 72 Sierra Grande with paint color on the firewall. it looks like it may have been put on before the paint and again in white grease after paint? I have another example with GMC noted from my 69.

[John H.]

The 69 is gold with saddle interior.

[litew8]

Originally Posted by sboris

Had this under the green paint. Matched all the grease marks all over the truck. Looks to be painted on with a brush. Built in Janesville.. 68 cab

Funny, my firewall has numbers 441 also painted on with what seems like a brush. Right behind the engine. You're the only other I've seen similar. Also assembled in Janesville (maybe the same employees painted)

[sboris]

Also just curious, is that stamp on the firewall edge on 72 only? My 68 don't have it. Or plant specific maybe..

[davischevy]

Any body know what the "4T" on the Sierra Grande firewall stands for? My Cheyenne Super has the same 4T.