Help! Need a new ECM for my eRod LS3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 06-03-2017, 12:50 PM

Here's the part numbers from the instruction sheet. Can anyone help me find a replacement? I've had no luck with google, gmpartsdirect, etc...

davepl · 06-04-2017, 12:30 PM

Closest I can find so far is:

https://www.summitracing.com/parts/nal-19259291

...but that's just based on a forum post I found where the guy had the same operating system as mine on it, so I still don't know for sure. Any help would be appreciated!

vannatta20 · 06-05-2017, 12:21 AM

PM and I can help. Should just need a E38 ECU. Do you have to have a Erod tune for emissions?

davepl · 06-05-2017, 02:37 PM

Thanks! But it turns out the ECM was OK after all. For some reason it would not start, then I connected to the ECM with HPTuners, then was able to start it. No idea... very weird.

I do have a copy of the original tune. It shows:

Hardware: E67, GM Gen IV
VIN: Some magic number followed by "LS3_REL7"
Operating System: 12638778

In case it does ever need replacing, what are the odds I could grab just any random E67 ECM off eBay and load that tune onto it? I'd have to buy another HPT license for it I guess, and the VIN wouldn't update, but would it take the tune?

06-03-2017, 12:50 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Help! Need a new ECM for my eRod LS3 Here's the part numbers from the instruction sheet. Can anyone help me find a replacement? I've had no luck with google, gmpartsdirect, etc... Attached Images __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible Last edited by davepl; 06-04-2017 at 07:59 PM.

06-04-2017, 12:30 PM	#2
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Help! Need a new ECM for my eRod LS3 Closest I can find so far is: https://www.summitracing.com/parts/nal-19259291 ...but that's just based on a forum post I found where the guy had the same operating system as mine on it, so I still don't know for sure. Any help would be appreciated! __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

06-05-2017, 12:21 AM	#3
vannatta20 Registered User Join Date: Oct 2011 Location: Las Vegas, NV Posts: 291	Re: Help! Need a new ECM for my eRod LS3 PM and I can help. Should just need a E38 ECU. Do you have to have a Erod tune for emissions?

06-05-2017, 02:37 PM	#4
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Help! Need a new ECM for my eRod LS3 Thanks! But it turns out the ECM was OK after all. For some reason it would not start, then I connected to the ECM with HPTuners, then was able to start it. No idea... very weird. I do have a copy of the original tune. It shows: Hardware: E67, GM Gen IV VIN: Some magic number followed by "LS3_REL7" Operating System: 12638778 In case it does ever need replacing, what are the odds I could grab just any random E67 ECM off eBay and load that tune onto it? I'd have to buy another HPT license for it I guess, and the VIN wouldn't update, but would it take the tune? __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

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