2013's not as bad as the 2011's on TCM's. Have you actually checked the circuits to see if there is a simple problem to be solved?

 

I havent checked the fuel pressure sensor yet. I wasn’t sure if it was the TCM causing it or what. But I will try this out tomorrow. Thanks for the information Ron Neilson

 

Willing to bet it’s a loose wire somewhere givin if you both codes.

I sent an ECM off to goecm out of Texas. Could be a cheaper option to repair it and test to see if anything is actually bad with the TCM.

 

Can you give more information about 'goecm'. I shipped my TCM 24256861 to RockAuto and after two weeks, they emailed back to say they could not repair. I am looking for anyone who does repair these modules.

 

I have the same problem ... truck is down since 3.5 weeks , i tried a 2007's (not sure the part#) have a gm tech to program it and nothing to do.. doesnt work ! cant find a used one ! Kinda out of ideas tbh!

 

I found GoECM module repair services. Has anyone had experience with these folks? Are they reliable?

Had a lengthy discussion with GoECM; they do not repair the Transmission Control Modules. So dissappointing.

 

I found GoECM module repair services. Has anyone had experience with these folks? Are they reliable?

yeah I sent an ECM to them I was having problems with and I didn’t want my brand new one to also kick the bucket due to not knowing if it was the truck or the ECM. They diagnosed it emailed me with what the issues were and what it would cost. Once I confirmed repair costs they fixed it and shipped it back. Came back cleaned, repaired, a list of what was wrong and a new label from them for warranty purposes attached to it.

Extremely happy with their customer service and turnaround. I think it took like 10 days total from the time I shipped it to the time it was back in my hands on the truck.

I was skeptical due to the prices of ECMs in the current market and figured any company would say it was toast and not worth fixing and try to just keep it for their own good. I’d email GoEcm and make sure they can diagnose/repair your specific module

 

Did you ship your TCM to GoECM? I contacted them for my TCM, same part number as you, and they said they do not repair them.

 

I shipped them my ECM, figured they may work on TCMs but guess not. Did you ask if they knew of anybody who did? Had to be a pretty small market of folks doing these kinds of repairs.

 

according to my interchange system, I am in the used parts business, those part numbers will interchange.

 

Hello, new to the forum and researched and called every place in the country to repair the TCM out of my 2012 HD 2500 6.6 and found Auto Computer Specialist out of Florida. Had common U0101 and shifting issues, stabiliTtrac light and no communication with TCM. Sent it off to them and they did the repair, got great customer service and all is back to normal with truck running great again. It was so frustrating not being able to get my truck going again after months of being down and refusing to pay $4k for a new one so writing this in hopes of helping others. Best of luck to all...

 

How long did they have ur tcm for? If u dont mind me asking. I just reached out to them earlier waiting on a reply

 

It was $799.00 for a combo TCM & PCM REPAIR and update. Unfortunately I forgot to tell them my truck had a tune on it so I lost it but my fault cause I was in a hurry and forgot to write it as well on the paperwork. Fortunately. I was able to get file re-uploaded from tune supplier by saying I replaced ECM. FYI, if you have a tune or deleted say something or just send TCM.

 

Yea i said on the form that i had a tune. Thanks for the heads up tho!! I planned on just sending the TCM to them

 

It is a lifetime warranty.

 

you sure about this? nobody told me this and im in the waiting list cause they are b/o

 

Do you still have the TCM?

 

Did we ever get an answer to the original question: Will #25978353 work as a replacement for #24256861? Would someone from GM be able to answer this question? Would someone from GM be able to say when they might start building the part again?

 

I Second this, does anyone have an answer? 24256861 shows the new number for pn 25978353

 

I just got off the phone with Auto Computer Specialist. They are not taking any more TCMs right now as they are so backed up.

 

Out of curiosity since uve already had ur done.. did they say anything about any kind of warranty for the work they did?

Just wondering if you ever got your TCM problem resolved. Ours Truck has been down since August 2022 and after communicating with GM they supposedly have given the part a new part number. But I highly doubt there are any available yet. We've tried everything to no avail.

 

Has anyone used xeModex out of Ontario? They have apparently had success repairing this. I spoke to them today and may try them out. It’s pretty much the main thing they do is repair TCM’s.
additionally, I did take mine apart and my specific module did not destroy the motherboard. It was just a glued lid. It’s a matter of applying a little heat to pry it up and break the seal. Had one of controls guy pull it apart.

 

I think I may have found the culprit. Next is to pull that tcm and see where the short may be.

 

General Motors produced several years of vehicles with a faulty transmission control module. From 2008 thru 2015, Chevrolet and GMC 2500 & 3500 trucks with the 6.6 L Duramax engine and Allison 1000 transmission all used the same TCM; part number 24256861. This part has experienced a very high failure rate. During the summer of 2022, the meager stock of replacement parts was exhausted and GM has not made plans to manufacture new parts. An estimated 5000 vehicles are currently unusable due to the failure of this part and no new parts available. It is our intent to file a class action law suit against both General Motors and Allison Transmission to have new parts manufactured.
If you are interested in joining this class action, email to b.alsup@live.com with the phrase "GM/Allison Transmission Control Module Class Action Lawsuit" as the subject.

 

Allison hasn’t been associated with GM since 2006… Good luck!

 

I don’t understand I guess. If that is the case, how do these trucks have Allison transmissions in them post 2006

 

Phi... they technically don't. The 6spds were built Under License to Allison. The early 5spd was built by Allison but the 6spd were developed & design from the 5spd by Allison and manufactured in-house by GM at the GM transmission facility outside Baltimore.

 

thanks for the explanation.

 

So I shipped off my TCM to XeModex. I will keep y’all posted on the progress.

 

I just got off the phone with XeModex, I found them last night doing a search and the price was $1200. Today when I pulled up their website it is $1499. They are 2 weeks out on repairs and the technician said they have been able to repair most of them. After initial testing, if they cannot repair, they send it back and refund service money minus shipping. I still had the site open on my phone, so I was able to get it in the cart for 1200. Hopefully this works. Anyone have one come back from them yet?

 

There are a couple guys in the class action email chain that have gotten theirs back. Mine is on its way back from them.

 

Any update on the repair? I'm ready to send mine to someone for repair...tired of my truck just being a yard ornament

 

I ordered the repair from XeModex on the 8th, got my shipping labels. I couldn't make it to UPS store to ship until the 13th after work and they turned it around crazy fast. I was notified that I had a shipment coming back from them on the 20th. The TCM was delivered on the 24th. I took it right to the truck plugged it in and mounted and has been running good so far. It's only been a week and about 100 miles but I am pleased to have my truck back. I was concerned they were sending it back so quickly because they couldn't repair but all is good. They cut it apart, repair and seal it back up. Price has gone up in the last few weeks, but I am happy I sent it off and didn't wait till who knows when to get a new one. My next option was buying a new truck but damn I don't want that payment. Good luck

 

Got my TCM back from Xemodex over the weekend and put it back in yesterday. Have only driven about 25 miles on it so far, but it is shifting as smooth as it ever has. Got out and cleaned all the caked up pollen and bird crap (from sitting for the past 5+months) off of it today. Will be driving it back and forth to work the rest of the week to see how it's going to act, but if it is anything like the 25 or so miles I've put on it yesterday and today, I will recommend Xemodex to anyone that is needing their TCM repaired.

 

If you don’t mind, what did it cost you? I was given their number today to call.

 

I did a CP3 conversion kit with a lift pump and all my fuel rail and pressure issues went away. I also had the same issue with my TCM and I can't figure out how to pull it apart. It's possible that a friend of a friend who is a tech guru could possibly fix it for me but doesn't know until we see what parts are in it so if anybody knows how to pull it apart, please let me know and thank you.