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

ECM identification

Thread Tools
 
Search this Thread
 
Old Jul 24, 2019 | 09:42 PM
  #1  
conty's Avatar
conty
Thread Starter
Heel & Toe
 
Joined: Apr 2019
Posts: 16
Likes: 0
Default ECM identification


Could somebody help me with identification of ECM module for Corvette C4 - Is this PROM related to manual transmission 1226430 or to automatic transmission 1226026 ECM?

Last edited by conty; Jul 24, 2019 at 11:08 PM.
Reply
Old Jul 25, 2019 | 10:00 AM
  #2  
Kevova's Avatar
Kevova
Le Mans Master
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Default

Google GM Prom Broadcast Codes you will find downloads that may help ID Prom.
3940 CDR is broadcast code. Original prom broadcast code is also on the original ECM label.

Last edited by Kevova; Jul 25, 2019 at 10:02 AM.
Reply
Old Jul 25, 2019 | 12:02 PM
  #3  
conty's Avatar
conty
Thread Starter
Heel & Toe
 
Joined: Apr 2019
Posts: 16
Likes: 0
Default


Originally Posted by Kevova
Google GM Prom Broadcast Codes you will find downloads that may help ID Prom.
3940 CDR is broadcast code. Original prom broadcast code is also on the original ECM label.
Thanks a lot, it helps. I do not know, what I have to look for. Still many things to learn. In the meantime, I have got from a seller an ECM's label, picture attached. I need it for swapinto my C3 1982. So I think, I got it!
Reply
Old Jul 25, 2019 | 01:18 PM
  #4  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,331
Likes: 2,722
Default

Your ECM and PROM are from an '84 Corvette w/auto using the info you've supplied.
Reply
Old Jul 25, 2019 | 04:32 PM
  #5  
conty's Avatar
conty
Thread Starter
Heel & Toe
 
Joined: Apr 2019
Posts: 16
Likes: 0
Default

Originally Posted by WVZR-1
Your ECM and PROM are from an '84 Corvette w/auto using the info you've supplied.
Thank you for your confirmation. I looked for this ECM (1226026), but a conversation with a seller take a long time due to different time zone... I did not want to miss this chance to buy only one ECM, which is able to swap into C3 (1225550). I got only a picture of PROM so I tried to found out, whether is from automatic transmission (manual do not fit) and it is no problem to buy aftermarket PROM...
Reply

Get notified of new replies

To ECM identification





All times are GMT -4. The time now is 12:14 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE