Factory firewall markings - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72dually · 03-07-2005, 09:40 PM

Well I had a few hours sunday, so I ripped that poor girl apart-(the GMC), and I was amazed to see some factory markings still on the firewall, I thought it was kinda kool.
I said my goodbyes to that gmc front clip, straight or not. I bought new fenders, tailgate, core support, doors, grille, for a 72 chevy at pomona yesterday. I still need a new grille surround

*Gee_Emm* · 03-07-2005, 10:41 PM

I have never seen a black firewall from the factory before, my guess is the PO painted it and drew on it????

Hutch · 03-07-2005, 11:21 PM

72dually
I have never seen marks like those
I have seen an awful lot of trucks that have a glob of sealer on the drivers side under the cowl where the assembly line worker laid the sealer gun after sealing the windshield though.
Factory marks are cool

Harold Shepard · 03-07-2005, 11:12 PM

Black truck would have a black firewall. The firewall was always the same color as the primary color of the cab. 72 dually check under the driver's seat and see if there is a number there. My 71 had 118 in 14/16 inch numerals written in the flat portion of the rear floor pan. Truck I am working on now had paint code written in yellow grease pencil on the front of the gas tank. 71 also had numbers on core support, 460 under the brake booster and model and vin across the drip gutter at top of the firewall. All of which by the way was in white grease pencil- one of the whitewall markers is pretty close to the correct flake off and width to replace the markings with. Harold

chevydog66 · 03-07-2005, 11:35 PM

My green and white 72 GMC still has the original white grease pen markings on it

BobbyK · 03-08-2005, 02:10 AM

I found this when cleaning up my firewall.

72dually · 03-08-2005, 06:29 PM

Yep, its a factory black truck, w/black interior, and black lower trim, its a 500, 600 code
I wiped down the floor with water and a old tee shirt, most of the surface rust ended up wipeing right off, I didnt see any other markings, other than what appears to be a 50 stamped on the cowl area, I took a picture. I did find the original posi decal on the passenger side, the tank has a sticker as well as CAL stamped on it in black, Im sure that was the california emmissions tank

72dually · 03-08-2005, 09:08 PM

Yeah, after seeing the markings on your trucks, it makes me wonder, its still possible they were having fun on the assembly line........Nah, who knows????

TruckinDaddy · 03-08-2005, 10:47 PM

My 68 has the markings CE 10904 still easily visible on the firewall.

I am glad this thread came up, I was curious about the markings. A buddy was trying to convience me that the front end might have been replaced and these were boneyard inventory markings.

I did not know, but I knew the truck had only had the passenger door and front fender replaced.

*Gee_Emm* · 03-08-2005, 10:50 PM

I have some on my hood and firewall.

Rod · 03-10-2005, 12:10 PM

Basically its your model number thats written on the firewall.

Hutch CE10734 is a plain model number Conventional Cab Eight cylinder 07 means 54 inch so its short wheel case and 34 is a fleetside box.

Truckin Daddy same there too typically CE 10904

Conventional cab , Eight cylinder, 09 for cab to rear axle dimension of 59 inches..so its long wheel base..the 127 inch vaiety....04 is the step side fender box.

I'm not sure what stamped 50 is 72 Dually's

Gee Emm the number 555 is a code for two tone custom paint on your truck... the secondary color should be a medium tone of primary color. Bronze Dark and Bronze Medium respectively.

Basically the shop workers are building a truck and write number on it to know what their building since they probably didn't have a glove box id sticker in the building stage...more probable and build sheet or order - something like that.

525 is the paint code for your Blazer BobbyK5, but I figure you knew that anway,b but code 525 is Bright Yellow in 1971.
Odd to see Light Yellow written there.

FRENCHBLUE72 · 03-27-2005, 12:17 PM

All mine have been repainted at least once in there life so no grease pencil ....Bummer.

FarmboyForever · 10-09-2016, 07:30 PM

My 1971 Chevy 1/2 ton 2wd suburban has numbers stamped on the top edge of drivers sixe firewall/cowl. Any thoughts? See pic.

bruceman1968 · 10-09-2016, 08:30 PM

Quote:

Originally Posted by FarmboyForever

My 1971 Chevy 1/2 ton 2wd suburban has numbers stamped on the top edge of drivers sixe firewall/cowl. Any thoughts? See pic.

Here you go Ken, This thread will explain it.
http://67-72chevytrucks.com/vboard/s...d.php?t=674971

lux hauler · 03-27-2005, 09:52 AM

My '72 had the numbers 661 (I think?) written in yellow grease pencil directly behind the engine.

03-07-2005, 09:40 PM	#1
72dually Senior Member Join Date: Apr 2004 Location: Northern Arizona Posts: 687	Factory firewall markings Well I had a few hours sunday, so I ripped that poor girl apart-(the GMC), and I was amazed to see some factory markings still on the firewall, I thought it was kinda kool. I said my goodbyes to that gmc front clip, straight or not. I bought new fenders, tailgate, core support, doors, grille, for a 72 chevy at pomona yesterday. I still need a new grille surround Attached Images

03-07-2005, 11:21 PM	#3
Hutch Registered User Join Date: Oct 2001 Location: Grapevine, Tx. Posts: 2,142	72dually I have never seen marks like those I have seen an awful lot of trucks that have a glob of sealer on the drivers side under the cowl where the assembly line worker laid the sealer gun after sealing the windshield though. Factory marks are cool Attached Images __________________ John Hutchison Grapevine,Texas 68 1/2 t swb 68 Mustang 69 Jaguar 71 1/2 t swb 88 Supra CompTs6m 93 Escort GT 2005 Corolla XRS

03-07-2005, 11:12 PM	#4
Harold Shepard Registered User Join Date: May 2004 Location: Canton North Carolina Posts: 466	Black truck would have a black firewall. The firewall was always the same color as the primary color of the cab. 72 dually check under the driver's seat and see if there is a number there. My 71 had 118 in 14/16 inch numerals written in the flat portion of the rear floor pan. Truck I am working on now had paint code written in yellow grease pencil on the front of the gas tank. 71 also had numbers on core support, 460 under the brake booster and model and vin across the drip gutter at top of the firewall. All of which by the way was in white grease pencil- one of the whitewall markers is pretty close to the correct flake off and width to replace the markings with. Harold Last edited by Harold Shepard; 03-07-2005 at 11:18 PM.

03-07-2005, 11:35 PM	#5
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	My green and white 72 GMC still has the original white grease pen markings on it __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up Last edited by chevydog66; 08-09-2009 at 02:17 PM.

03-08-2005, 02:10 AM	#6
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,772	I found this when cleaning up my firewall. __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

03-07-2005, 10:41 PM	#2
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	I have never seen a black firewall from the factory before, my guess is the PO painted it and drew on it????

03-08-2005, 06:29 PM	#7
72dually Senior Member Join Date: Apr 2004 Location: Northern Arizona Posts: 687	Yep, its a factory black truck, w/black interior, and black lower trim, its a 500, 600 code I wiped down the floor with water and a old tee shirt, most of the surface rust ended up wipeing right off, I didnt see any other markings, other than what appears to be a 50 stamped on the cowl area, I took a picture. I did find the original posi decal on the passenger side, the tank has a sticker as well as CAL stamped on it in black, Im sure that was the california emmissions tank Attached Images Last edited by 72dually; 03-08-2005 at 09:06 PM.

03-08-2005, 09:08 PM	#8
72dually Senior Member Join Date: Apr 2004 Location: Northern Arizona Posts: 687	Yeah, after seeing the markings on your trucks, it makes me wonder, its still possible they were having fun on the assembly line........Nah, who knows????

03-08-2005, 10:47 PM	#9
TruckinDaddy What's that funky smell? Join Date: Mar 2005 Location: Austin, TX Posts: 610	My 68 has the markings CE 10904 still easily visible on the firewall. I am glad this thread came up, I was curious about the markings. A buddy was trying to convience me that the front end might have been replaced and these were boneyard inventory markings. I did not know, but I knew the truck had only had the passenger door and front fender replaced. __________________ Mike S 68 C10 Long Step (Pretending to be a Long Fleetside) Grandpa's Farm Truck 3 on the tree, 307, No power brakes or steering Factory Options - HD rear spring and Ammeter/Oil Gauges My truck blog My Car Domain page

03-08-2005, 10:50 PM	#10
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	I have some on my hood and firewall.

03-10-2005, 12:10 PM	#11
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Basically its your model number thats written on the firewall. Hutch CE10734 is a plain model number Conventional Cab Eight cylinder 07 means 54 inch so its short wheel case and 34 is a fleetside box. Truckin Daddy same there too typically CE 10904 Conventional cab , Eight cylinder, 09 for cab to rear axle dimension of 59 inches..so its long wheel base..the 127 inch vaiety....04 is the step side fender box. I'm not sure what stamped 50 is 72 Dually's Gee Emm the number 555 is a code for two tone custom paint on your truck... the secondary color should be a medium tone of primary color. Bronze Dark and Bronze Medium respectively. Basically the shop workers are building a truck and write number on it to know what their building since they probably didn't have a glove box id sticker in the building stage...more probable and build sheet or order - something like that. 525 is the paint code for your Blazer BobbyK5, but I figure you knew that anway,b but code 525 is Bright Yellow in 1971. Odd to see Light Yellow written there. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

03-27-2005, 12:17 PM	#12
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,606	All mine have been repainted at least once in there life so no grease pencil ....Bummer. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

10-09-2016, 07:30 PM	#13
FarmboyForever Registered User Join Date: Feb 2016 Location: Bath, MI Posts: 2	Re: Factory firewall markings My 1971 Chevy 1/2 ton 2wd suburban has numbers stamped on the top edge of drivers sixe firewall/cowl. Any thoughts? See pic. Attached Images __________________ Ken

03-27-2005, 09:52 AM	#15
lux hauler Psycho-billy Member Join Date: Jul 2001 Location: about 40 miles west of Cleveland, Ohio Posts: 2,591	My '72 had the numbers 661 (I think?) written in yellow grease pencil directly behind the engine. __________________ '72 C-10 350 w/Lunati Voodoo cam (207/213, .437/.454), Performer intake, 625 Road Demon Jr. and Hooker headers. Support your community, support yourself. Buy local, buy American (or Canadian).



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.