C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ECM Mounting Hardware

Thread Tools
 
Search this Thread
 
Old Sep 12, 2014 | 08:09 AM
  #1  
Rik O'Shay's Avatar
Rik O'Shay
Thread Starter
Instructor
 
Joined: Aug 2014
Posts: 173
Likes: 9
From: Denver Colorado
Default ECM Mounting Hardware

the top right corner of my ECM is missing the correct hardware that keeps it in place-

Here is a photo of the corner in question-



What hardware is holding your ECM in place?

A photo would be appreciated- thanks!
Reply
Old Sep 12, 2014 | 08:26 AM
  #2  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,393
Likes: 2,741
Default

The year and other information is always helpful when you're looking for HELP! I'm guessing a '92+ car and likely an LT1 using only the conduit cover for the ECM connectors as a guide. What is the year? There's a grommet/stud/nut arrangement and I don't believe a snapshot will help you but if you mention year I believe I can supply you with a good image.

Try this image and parts 6, 7, 8, 9 for the hardware. Those not listed in the nomenclature aren't available but if you confirm the year I'll supply you with those numbers.

http://parts.nalleygmc.com/showAssem...=0&modelYear=0

Last edited by WVZR-1; Sep 12, 2014 at 08:30 AM.
Reply
Old Sep 12, 2014 | 09:10 AM
  #3  
Rik O'Shay's Avatar
Rik O'Shay
Thread Starter
Instructor
 
Joined: Aug 2014
Posts: 173
Likes: 9
From: Denver Colorado
Default

Originally Posted by WVZR-1
The year and other information is always helpful when you're looking for HELP! I'm guessing a '92+ car and likely an LT1 using only the conduit cover for the ECM connectors as a guide. What is the year? There's a grommet/stud/nut arrangement and I don't believe a snapshot will help you but if you mention year I believe I can supply you with a good image.

Try this image and parts 6, 7, 8, 9 for the hardware. Those not listed in the nomenclature aren't available but if you confirm the year I'll supply you with those numbers.

http://parts.nalleygmc.com/showAssem...=0&modelYear=0
Doh!

Sorry about that!

1991 Base Coupe-

I see the part that I am missing, # 7 in the image, and it's not listed.

Looks like I'll have to look around for that one.

Thanks!
Reply
Old Sep 12, 2014 | 09:17 AM
  #4  
Rik O'Shay's Avatar
Rik O'Shay
Thread Starter
Instructor
 
Joined: Aug 2014
Posts: 173
Likes: 9
From: Denver Colorado
Default

Found it-

#14 on the diagram, not listed-
Reply
Old Sep 12, 2014 | 09:37 AM
  #5  
Rik O'Shay's Avatar
Rik O'Shay
Thread Starter
Instructor
 
Joined: Aug 2014
Posts: 173
Likes: 9
From: Denver Colorado
Default

Can't find a part number- was hoping to find that & then cross reference it.
Reply
Old Sep 12, 2014 | 10:19 AM
  #6  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,393
Likes: 2,741
Default

Originally Posted by Rik O'Shay
Can't find a part number- was hoping to find that & then cross reference it.
The grommet(#7) is GM# 14104640, spacer/sleeve (#6) is GM 14104639, the bolt is an M8 X 1.25 X 35 and an M8 flanged nut would complete it. '90+ cars should be the same. Assembly may be reversed from that image maybe, not sure. Nut might be on the backside of the assembly or maybe it was reversed in later years.

This shift lever grommet should work for the grommet and you could "adlib" the rest or buy an appropriate sleeve in a good hardware store. GM # 3975131 shift grommet should work + the nut and bolt I mentioned. The grommet is on many dealers shelves.

Last edited by WVZR-1; Sep 12, 2014 at 10:24 AM.
Reply
Old Sep 12, 2014 | 10:52 AM
  #7  
Rik O'Shay's Avatar
Rik O'Shay
Thread Starter
Instructor
 
Joined: Aug 2014
Posts: 173
Likes: 9
From: Denver Colorado
Default

Originally Posted by WVZR-1
The grommet(#7) is GM# 14104640, spacer/sleeve (#6) is GM 14104639, the bolt is an M8 X 1.25 X 35 and an M8 flanged nut would complete it. '90+ cars should be the same. Assembly may be reversed from that image maybe, not sure. Nut might be on the backside of the assembly or maybe it was reversed in later years.

This shift lever grommet should work for the grommet and you could "adlib" the rest or buy an appropriate sleeve in a good hardware store. GM # 3975131 shift grommet should work + the nut and bolt I mentioned. The grommet is on many dealers shelves.
Very cool, thanks!

I have everything except the rubber iece- will see if I can order that.
Reply

Get notified of new replies

To ECM Mounting Hardware





All times are GMT -4. The time now is 03:09 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE