Holes in firewall ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**southern parts** · 10-16-2006, 07:33 PM

Does anyone know what these holes are for? Thanks Woody

neonlarry · 10-16-2006, 08:10 PM

The top pic holes are to mount two warning buzzers or relays.
The bottom pic holes are to mount a nylon bushing foor a vacuum acuated vent rod, which I believe are on A\C trucks only.

**uncle** · 10-16-2006, 08:15 PM

These holes are above that area though.

**southern parts** · 10-16-2006, 08:46 PM

Sorry, The holes I`m talking about are above the heaterbox on the pass side and about the same location of the firewall on the drivers side.

*rage'nrat638* · 10-16-2006, 08:57 PM

here you go

Coleman · 10-16-2006, 09:36 PM

I guess I'll steal this thread a little, I'm basically doing the same but my question is where do I get rubber gromets/bushings, whatever you call them for these holes. I see that I can get the steering column rubber but where do we get the others like where the windsheild washer pisser hoses go.

**FRENCHBLUE72** · 10-16-2006, 09:41 PM

Never seen those holes there before..

Bob Moore · 10-16-2006, 09:44 PM

Southern Parts - Do those have threads behind them? It looks like they do from the photos.

**southern parts** · 10-16-2006, 09:46 PM

I`m almost sure there factory. They have weld nuts behind them.

**John Fabris** · 10-16-2006, 10:11 PM

Good Question... I have not seen those holes before, have no idea what they are for.....

wibilly · 10-17-2006, 12:07 AM

my 72 gmc/ac cab don't have either of them sets of holes not sure of any of the others its dark out dare

qksilver · 10-17-2006, 08:25 AM

I looked at my collection and none of my trucks had those holes

**Yukon Jack** · 10-17-2006, 10:22 AM

Never seen those holes in those locations before.

**LockDoc** · 10-17-2006, 12:37 PM

None of mine have them (3) One GMC two Chevys....

Oh, and a '65

LockDoc

10-16-2006, 07:33 PM	#1
southern parts Senior Member Join Date: Apr 2003 Location: Elberton Ga. Posts: 3,470	Holes in firewall ? Does anyone know what these holes are for? Thanks Woody Attached Images Last edited by southern parts; 10-16-2006 at 07:41 PM.

10-16-2006, 08:10 PM	#2
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Re: Holes in firewall ? The top pic holes are to mount two warning buzzers or relays. The bottom pic holes are to mount a nylon bushing foor a vacuum acuated vent rod, which I believe are on A\C trucks only. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

10-16-2006, 08:15 PM	#3
uncle Senior Member Join Date: Aug 2003 Location: Conyers,Ga. Posts: 7,287	Re: Holes in firewall ? These holes are above that area though.

10-16-2006, 08:46 PM	#4
southern parts Senior Member Join Date: Apr 2003 Location: Elberton Ga. Posts: 3,470	Re: Holes in firewall ? Sorry, The holes I`m talking about are above the heaterbox on the pass side and about the same location of the firewall on the drivers side.

10-16-2006, 08:57 PM	#5
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: Holes in firewall ? here you go Last edited by rage'nrat638; 07-12-2007 at 07:02 AM.

10-16-2006, 09:36 PM	#6
Coleman Registered User Join Date: Nov 2005 Location: Tucson, AZ Posts: 50	Re: Holes in firewall ? I guess I'll steal this thread a little, I'm basically doing the same but my question is where do I get rubber gromets/bushings, whatever you call them for these holes. I see that I can get the steering column rubber but where do we get the others like where the windsheild washer pisser hoses go. __________________ 68 Chevy K20 72 Chevy K20 (new) 2000 Silverado Z71

10-16-2006, 09:41 PM	#7
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,608	Re: Holes in firewall ? Never seen those holes there before.. __________________ 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..

10-16-2006, 09:44 PM	#8
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: Holes in firewall ? Southern Parts - Do those have threads behind them? It looks like they do from the photos. __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

10-16-2006, 09:46 PM	#9
southern parts Senior Member Join Date: Apr 2003 Location: Elberton Ga. Posts: 3,470	Re: Holes in firewall ? I`m almost sure there factory. They have weld nuts behind them.

10-16-2006, 10:11 PM	#10
John Fabris TOTY 2006 Join Date: Dec 1999 Location: Magalia CA USA Posts: 2,270	Re: Holes in firewall ? Good Question... I have not seen those holes before, have no idea what they are for..... __________________ John Fabris 67 C10 SWB

10-17-2006, 12:07 AM	#11
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: Holes in firewall ? my 72 gmc/ac cab don't have either of them sets of holes not sure of any of the others its dark out dare __________________ common sense isn't so common anymore

10-17-2006, 08:25 AM	#12
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: Holes in firewall ? I looked at my collection and none of my trucks had those holes

10-17-2006, 10:22 AM	#13
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Re: Holes in firewall ? Never seen those holes in those locations before. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

10-17-2006, 12:37 PM	#14
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,607	Re: Holes in firewall ? None of mine have them (3) One GMC two Chevys.... Oh, and a '65 LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 10-17-2006 at 12:40 PM.



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