The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-23-2013, 05:38 PM   #1
fun in dirt
Registered User
 
fun in dirt's Avatar
 
Join Date: Jan 2007
Location: Mississippi
Posts: 2,117
Help with firewall hole?

What came out of this hole?
Been searching old threads & don't see this hole in several firewalls.
It's on a '89 one ton cab that had throttle body 350 & a/c.
Attached Images
 
__________________
'72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432
'85 K30 "Big Nassy"
'06 3500 Duramax ...tow truck
'06 Silverado SS...DD
'06 C1500 WT...DD
'07 Classic C1500 WT...DD
Built & sold cause can't keep 'em all:
'72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190
'55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938
'69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541
'86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619
fun in dirt is offline   Reply With Quote
Old 12-23-2013, 07:00 PM   #2
bigd65
Registered User
 
bigd65's Avatar
 
Join Date: Mar 2000
Location: Lake Jackson, TX.
Posts: 1,930
Re: Help with firewall hole?

WAS, where the ELECTRONIC SPARK CONTROL MODULE WIRING went through the firewall
__________________
2004 Silverado Crewcab (Dark Spiral Gray)
bigd65 is offline   Reply With Quote
Old 12-23-2013, 07:07 PM   #3
fun in dirt
Registered User
 
fun in dirt's Avatar
 
Join Date: Jan 2007
Location: Mississippi
Posts: 2,117
Re: Help with firewall hole?

Cool thanks!
__________________
'72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432
'85 K30 "Big Nassy"
'06 3500 Duramax ...tow truck
'06 Silverado SS...DD
'06 C1500 WT...DD
'07 Classic C1500 WT...DD
Built & sold cause can't keep 'em all:
'72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190
'55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938
'69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541
'86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619
fun in dirt is offline   Reply With Quote
Old 12-23-2013, 07:56 PM   #4
joe231
Registered User
 
joe231's Avatar
 
Join Date: Dec 2007
Location: Palmer, Alaska
Posts: 13,821
Re: Help with firewall hole?

87-91 that hole is for the Fuel injection system ECM (computer) wiring.
__________________
CHEVY ONLY
joe231 is offline   Reply With Quote
Old 12-23-2013, 11:15 PM   #5
bigd65
Registered User
 
bigd65's Avatar
 
Join Date: Mar 2000
Location: Lake Jackson, TX.
Posts: 1,930
Re: Help with firewall hole?

That to , the older news with the ESC system went through the very same hole
__________________
2004 Silverado Crewcab (Dark Spiral Gray)
bigd65 is offline   Reply With Quote
Old 12-24-2013, 12:28 AM   #6
Big Port Jimmy 6
Addicted to Rust
 
Big Port Jimmy 6's Avatar
 
Join Date: Dec 2009
Location: Abbeville SC
Posts: 1,030
Re: Help with firewall hole?

I covered the one in mine with a deadbolt block off plate from Lowes. Fit perfect.
Jay
__________________
Current trucks:
(48 GMC100 320 inliner) Gone
(48 Suburban in pieces) Sold
87 GMC CCSB 5.3 4l60E Daily Driver

ECTA National record holder XO/PP

We never really grow up, we just learn how to act in public.
Big Port Jimmy 6 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:15 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com