Valve Body Replacement - 2023 Silverado Custom Trail Boss

[s10dragracer888]

16 hours ago, GMCustomerService said:

Our team would like to offer our assistance and act as the middle man between yourself and your dealership if you are interested. If so, please email us at [email protected] so we can learn more. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.

You can start being a good middle man by allowing warranty claims to be PROPERLY repaired with the valve body upgrade and repair kits from Next Gen Drivetrain. GM has been lying to us and the NHTSA for years about “no fix available”, our wait times, and as if it wasn’t enough to actively steal from the customers, waste their time, and making them pay huge loan notes while their trucks sit for MONTHS WITHOUT RENTAL CARS; they top it off by “fixing” our $50,000-$100,000 trucks with the same cheap, low-quality parts that caused the issue in the first place. Call Will, he can prove it. I’m sure the NHTSA would love to see the truth, too. “OEM” is bs when your parts are sourced from countries all over the planet.

 

Edited March 6, 2025 by s10dragracer888
Needed some more dirt thrown in.

[Frmol835]

40 minutes ago, s10dragracer888 said:

You can start being a good middle man by allowing warranty claims to be PROPERLY repaired with the valve body upgrade and repair kits from Next Gen Drivetrain. GM has been lying to us for years and fixing our $50,000-$100,000 trucks with the same cheap, low-quality parts that caused the issue in the first place. Call Will, he can prove it. I’m sure the NHTSA would love to see the truth, too. “OEM” is bs when your parts are sourced from countries all over the planet.

 

Exactly! Everyone needs to call the BBB too. This is ridiculous and a terrible way to do business.

[s10dragracer888]

3 hours ago, Frmol835 said:

Exactly! Everyone needs to call the BBB too. This is ridiculous and a terrible way to do business.

Next Gen Drivetrain posted a blog, and I quoted it in my last comment. There is a fix, they will work with your dealer, and they can get it covered under warranty. They even spoon fed the information on how to fix the valve body PROPERLY, DIRECTLY to GM, and GM ignored them. Continues to lie. They don’t want to accept that the “engineering” behind the “updated” valve body was a malpractice, and they don’t want to accept that they were wrong. Like Ford and the Pinto in the 80’s….they feel it’s cheaper to eat lawsuits than to address and fix the problem.

Edited March 6, 2025 by s10dragracer888
Spelling errors

[s10dragracer888]

As a matter of fact, I copied and pasted their preface here:

 

 

Preface from the Author:

Before we go into detail about this problem and how to fix it forever, we need to offer some preface. 10-Speed General Motors and Allison transmissions are just a small piece of what we design here, but we are so angered by the dishonest way General Motors has managed this recall that we felt that we had to write this and put this information out there 100% for free and in public forum.

We are the company that engineered a fix for this back in mid-2023. We actively receive several calls a day from people who are down all over the country, often little or no support from General Motors. Most of them are not being given loaner vehicles, and some are on the verge of losing their businesses and their homes.

There is a fix, and we want you to know about it because we believe General Motors is actively hiding it from you. Do not let them tell you there’s no fix as you see in the NHTSA filing linked below. It’s simply just not true, which we will prove to you shortly.

Look at this excerpt from the official recall documentation published by the NHTSA where they pledge that they will fix your vehicle for free, but unfortunately there simply isn’t a fix. This a bold-faced lie. We have the remedy, and we have more than enough of them to service the vehicles that are down and General Motors has known this for over a year.

In fact, we can have the parts to fix these vehicles on-site as quickly as overnight shipping with early morning delivery. General Motors simply doesn’t want to pay the bill their engineering malpractice created, and now they’re socializing these costs onto their consumers, and we think you should know about it.

Furthermore, we are aware that some people who are knowingly or unknowingly doing public relations work for General Motors are claiming that this is “barely a problem” and only “effects a few vehicles.” Not only is this unintelligent argument essentially a dismissal of the thousands of people making payments on a vehicle that’s dust-collecting at their local shop or dealership, the facts also prove otherwise.

As of November 2024, 462,000 vehicles are covered under this recall and it appears the recall may be expanded to cover even more. Of course not all of them are experiencing this problem, but all of them contain the parts that cause this problem to take place - a serious concern.

We sincerely hope this helps get you back on the road with peace of mind. If you need absolutely anything, our friendly staff are a phone call away and are trained at length on this specific recall. We’re here to help. We’re assuming that this content will make it back to General Motors, and that’s fine. They knew it was coming. Without further ado, enjoy the publication.

 

this can be found at

 

https://nextgendiesel.com/blogs/transmissions-101/general-motors-10-speed-transmission-recall-here-s-how-we-fixed-it?srsltid=AfmBOorUzZVxBSfl4XPEfPCs3kXZiEuNjiBntNgI0Qy67AvqeZbHM0N8

[Srode1]

Of course the logical question is has there been a switch to the new valve bodies in the transmissions being built and if so when?  Seems like there should be a stop sale order on everything on lots till they are updated with the new part(s) assuming it's applicable to all trucks.  

[SGrant]

Seems to be quite a few of us with the same valve body issue. Anyone know of a way we can see just how many have been affected by this same issue? Could be some interesting information to have. 

[GeoHawk]

My dealer called this afternoon telling me my truck has been repaired. They said they received a shipment of replacement valve bodies yesterday. Keeping fingers crossed that my truck is back to normal after 4 months at the dealer.

[s10dragracer888]

On 3/6/2025 at 1:08 PM, Srode1 said:

Of course the logical question is has there been a switch to the new valve bodies in the transmissions being built and if so when?  Seems like there should be a stop sale order on everything on lots till they are updated with the new part(s) assuming it's applicable to all trucks.  

 

On 3/6/2025 at 2:07 PM, SGrant said:

Seems to be quite a few of us with the same valve body issue. Anyone know of a way we can see just how many have been affected by this same issue? Could be some interesting information to have. 

 

22 hours ago, GeoHawk said:

My dealer called this afternoon telling me my truck has been repaired. They said they received a shipment of replacement valve bodies yesterday. Keeping fingers crossed that my truck is back to normal after 4 months at the dealer.

@Srode1 it’s a hard no, there are reports of the new valve bodies failing only weeks after return to service.

 

@SGrant I’m not sure if there’s any way to really know. General consensus (not lies from GM) says 462,000 is a low number. That is only the diesel models affected, however, gas models are suffering the same problems, with the same valve bodies.

 

@GeoHawk is there any way you can reference your work order and indicate whether or not the new valve body part number is different? I would assume it isn’t, but who knows. As far as I know, they’re replacing the valve bodies that fail with the same failure-prone parts.

Edited March 7, 2025 by s10dragracer888

[SGrant]

@SGrant I’m not sure if there’s any way to really know. General consensus (not lies from GM) says 462,000 is a low number. That is only the diesel models affected, however, gas models are suffering the same problems, with the same valve bodies.
 

462K seems like a strong number. Wonder when someone throws the BS flag and GM has to admit this is a bad idea on their part. 

[66ss3964spd]

1 hour ago, s10dragracer888 said:

I’m not sure if there’s any way to really know. General consensus (not lies from GM) says 462,000 is a low number. That is only the diesel models affected, however, gas models are suffering the same problems, with the same valve bodies.

I don't believe that is correct. The 462,00 number is from the recall on the diesel trucks and from what I've read a different transmission - the 8 speed, and for a different reason - the potential to briefly lock up the rear wheels. If so, not the same valve body and not the same symptoms as we're seeing with the 10 speed, which is the subject of this thread.

[s10dragracer888]

1 hour ago, Dan H 2023 HC said:

I don't believe that is correct. The 462,00 number is from the recall on the diesel trucks and from what I've read a different transmission - the 8 speed, and for a different reason - the potential to briefly lock up the rear wheels. If so, not the same valve body and not the same symptoms as we're seeing with the 10 speed, which is the subject of this thread.

The rear wheel lockup is attributed to the 10-speed, friend.

[SGrant]

What? I have a diesel with the 10 speed and was a victim of the valve body trans issue, that's how I ended up here in the first place. 

[Srode1]

12 hours ago, Dan H 2023 HC said:

I don't believe that is correct. The 462,00 number is from the recall on the diesel trucks and from what I've read a different transmission - the 8 speed, and for a different reason - the potential to briefly lock up the rear wheels. If so, not the same valve body and not the same symptoms as we're seeing with the 10 speed, which is the subject of this thread.

It's not an 8 speed problem, it's a 10 speed problem.  

[66ss3964spd]

15 hours ago, s10dragracer888 said:

The rear wheel lockup is attributed to the 10-speed, friend.

3 hours ago, Srode1 said:

It's not an 8 speed problem, it's a 10 speed problem.

The details of the 462,000 rear wheel lock up recall are all over the place, I read 2 articles that said it was the 8 speed. Regardless, thanks for the correction.

 

Even so. The 462K recall is for 2020-2022 trucks/SUV's with the LM2 3.0 or L5P 6.6 diesels (the D-max 6.6 uses the Allison branded 10-speed, a HD variant of the 10L transmission family). Since the lock up recall does not include the 2020-2022 gas 5.3 or 6.2 it stands to reason there is a difference in the 10-speeds used in the LM2/L5P diesels from those used in the 5.3/6.2. Gearing, VB, clutch packs, programming. Maybe all.

 

While excessive wear in the VB of the 3.0/6.6 transmissions was identified as the cause for the rear wheel lock up recall the failure mode for the 3.0/6.6 is different than the failure more for the 5.3/6.2, for which there doesn't appear to be any reports of lock-up.

 

Probably just all academic. While the 3.0/6.6 and 5.3/6.2 failures involve the same sub-assembly, the VB, how they are failing isn't the same which is why the 462k recall doesn't include the 5.3/6.2.

[longhorn_cop]

Well I guess im up. Live in Central Texas.

2024 GMC 1500 Denali. 6.2 4WD 10 speed. Bought in Mar ‘24. I have 23k miles. Just got the Service Transmission Now Unable to Shift Soon.

Gonna call my dealer here locally in Central Texas