Transmission valve body-no parts to be found

[Staceyr72]

I'm so curious to how many 2021 Tahoes are having this issue?
I have a high country, 2021, my dealership has had it for over 2 months, can't get the part to fix it - valve body-
They have another one there, that's been there for 5 months, can't get the part.
So, 2 Tahoes at same dealership, same problem, and can't get the part to fix.
I have escalated to chevy, have a case number, chevy themselves can't get the part to fix my truck. But I still have to pay for it-big payment for something, I can't drive, isn't worth anything for trade and useless- I am furious. I have been a lifetime chevy owner-and this is changing my mind.

Last nights communication with chevy escalation please read:
Dear STACEY,

We have the following update for your 2021 Chevrolet Tahoe, case number 9-14734770575.

We are still experiencing a delay on the part(s) needed to repair your 2021 Chevrolet Tahoe. We understand this is a significant inconvenience and we continue to work diligently to resolve the delay. If further information is made available, you will be contacted by your dealer or myself. Thank you again for your patience and please contact me to discuss any additional questions or concerns you may have.

I can be reached at the number listed below or emailed at [email protected] (please reply with history to this email for fastest response).

AND MY RESPONSE:

​

Thank you for the update.
However Janet, if you can not find the part. I want my truck fixed asap. If that means a new transmission then that means a new transmission. This is a Chevy problem and Chevy knows it. Otherwise, payoff my truck. Give me full value so I can trade it I owe $54k.
Not to be a complete rude person. But if my truck doesn’t get fixed fast. I’m going to start escalating this to who ever will listen
I know this isn’t your fault. But it’s not mine either. And I have a $1300 a month payment for something I can’t drive. And Chevy can’t fix!

 

[jfoj]

I feel for you with not having your vehicle.

Not sure if the vehicle has been taken apart or is just sitting at the dealer and what your Warranty status is.

I find that sometimes you need to bite the bullet and move on to different solutions.

A number of years ago I had 6 speed VW Tiptronic transmission with about 70,000 miles that was slamming into gear while downshifting, the hotter the transmission, the worse the slam. Vehicle clearly was out of Warranty by that point. I did some research and found a shop in CA that indicated they had 100% sucess rate with repairing these valve bodies. Pulled the valve body, pretty easy DIY job in the driveway. Shipped it out and was returned within a week back to me on the East Coast. Put the rebuilt valve body in, problem solved, no addition problems, worked really well. What was nice is the transmission was crazy clean inside, so very little debris or clutch material, so I knew the valve body was a good option. I think it only cost me $650 as I recall. But they did not need to replace any solenoids, not sure what they actually did to repair the valve body, but it worked out great.

What I have found is often the aftermarket transmission suppliers figure out the manufactuter problems and can come up with solutions pretty quickly. Some of the reworked parts or aftermarket parts are often more reliable than the OE supplier. This general 10 speed is now been around 4+ years so I assume many of the faults have been seen by the aftermarket and repair shops.

I did a quick search and came up with the provider listed in the links below. I have not used them or checked reviews, but they clearly seem to have some solutions. Suggest you search around to see if you can find a good local shop that may do valve body rebuilds or consider ordering one and returning the old one for a "Core".

Depending on what the problem is they may have a valve body repair kit or can also provide totally rebuilt valve bodies. While neither is a cheap option, it is an option and it may be better than waiting months more. You would need to balance if you have any Warranty coverage at this point and if not what you are willing to do as far as repair on your dime. Keep any and all paperwork and receipts as it appears that GM may be extending the Warranty on these problem valve bodies, they may have already done this. Also be aware that GM will often have to reimburse owners for repairs outside of the dealer network even if the repair would have been covered under Warranty. They may not cover the repair 100%, but will usually need to cover what they would have paid for the repair. Who knows a rebuild, reworked valvebody may be cheaper and more reliable than a OE replacement that you may not see for months??

While the info I put in the links below is quite pricy, I have seen other more reasonable prices. Even what I saw in one of the GM parts side indicated the valve body would be in the $1500 range, but your old one would need to be sent back as a "Core". So search around, I am sure there are some solutions.

Good luck and update the thread with what you end up doing to get the vehicle repaired.

I belive your Tahoe should have the 10L80 transmission, but before you do anything verify the transmission type.

History Of Valve Body Fix

P0747 Fix Info

Valve Body Upgrade Kit

Remanufactured Valve Body

YouTube Video

Valve Body Bolt Kit

 

[Big Mama]

Did you finance through GM? I’m not sure they’ll cooperate but worth a try. No truck no payment? Sounds goofy but so do they. Give the last 8 of your VIN to @915_Tahoe he’s the parts finder extraordinaire.

 

[Blackcar]

I'm so curious to how many 2021 Tahoes are having this issue?
I have a high country, 2021, my dealership has had it for over 2 months, can't get the part to fix it - valve body-
They have another one there, that's been there for 5 months, can't get the part.
So, 2 Tahoes at same dealership, same problem, and can't get the part to fix.
I have escalated to chevy, have a case number, chevy themselves can't get the part to fix my truck. But I still have to pay for it-big payment for something, I can't drive, isn't worth anything for trade and useless- I am furious. I have been a lifetime chevy owner-and this is changing my mind.

Last nights communication with chevy escalation please read:
Dear STACEY,

We have the following update for your 2021 Chevrolet Tahoe, case number 9-14734770575.

We are still experiencing a delay on the part(s) needed to repair your 2021 Chevrolet Tahoe. We understand this is a significant inconvenience and we continue to work diligently to resolve the delay. If further information is made available, you will be contacted by your dealer or myself. Thank you again for your patience and please contact me to discuss any additional questions or concerns you may have.

I can be reached at the number listed below or emailed at [email protected] (please reply with history to this email for fastest response).

AND MY RESPONSE:

​

Thank you for the update.
However Janet, if you can not find the part. I want my truck fixed asap. If that means a new transmission then that means a new transmission. This is a Chevy problem and Chevy knows it. Otherwise, payoff my truck. Give me full value so I can trade it I owe $54k.
Not to be a complete rude person. But if my truck doesn’t get fixed fast. I’m going to start escalating this to who ever will listen
I know this isn’t your fault. But it’s not mine either. And I have a $1300 a month payment for something I can’t drive. And Chevy can’t fix!

The problem getting parts may because of Bulletin in link.
Parts for repair are limited but doesn't help your problem. Did dealer give you vehicle to drive?

https://static.nhtsa.gov/odi/tsbs/2024/MC-11011826-0001.pdf

 

[Staceyr72]

I feel for you with not having your vehicle.

Not sure if the vehicle has been taken apart or is just sitting at the dealer and what your Warranty status is.

I find that sometimes you need to bite the bullet and move on to different solutions.

A number of years ago I had 6 speed VW Tiptronic transmission with about 70,000 miles that was slamming into gear while downshifting, the hotter the transmission, the worse the slam. Vehicle clearly was out of Warranty by that point. I did some research and found a shop in CA that indicated they had 100% sucess rate with repairing these valve bodies. Pulled the valve body, pretty easy DIY job in the driveway. Shipped it out and was returned within a week back to me on the East Coast. Put the rebuilt valve body in, problem solved, no addition problems, worked really well. What was nice is the transmission was crazy clean inside, so very little debris or clutch material, so I knew the valve body was a good option. I think it only cost me $650 as I recall. But they did not need to replace any solenoids, not sure what they actually did to repair the valve body, but it worked out great.

What I have found is often the aftermarket transmission suppliers figure out the manufactuter problems and can come up with solutions pretty quickly. Some of the reworked parts or aftermarket parts are often more reliable than the OE supplier. This general 10 speed is now been around 4+ years so I assume many of the faults have been seen by the aftermarket and repair shops.

I did a quick search and came up with the provider listed in the links below. I have not used them or checked reviews, but they clearly seem to have some solutions. Suggest you search around to see if you can find a good local shop that may do valve body rebuilds or consider ordering one and returning the old one for a "Core".

Depending on what the problem is they may have a valve body repair kit or can also provide totally rebuilt valve bodies. While neither is a cheap option, it is an option and it may be better than waiting months more. You would need to balance if you have any Warranty coverage at this point and if not what you are willing to do as far as repair on your dime. Keep any and all paperwork and receipts as it appears that GM may be extending the Warranty on these problem valve bodies, they may have already done this. Also be aware that GM will often have to reimburse owners for repairs outside of the dealer network even if the repair would have been covered under Warranty. They may not cover the repair 100%, but will usually need to cover what they would have paid for the repair. Who knows a rebuild, reworked valvebody may be cheaper and more reliable than a OE replacement that you may not see for months??

While the info I put in the links below is quite pricy, I have seen other more reasonable prices. Even what I saw in one of the GM parts side indicated the valve body would be in the $1500 range, but your old one would need to be sent back as a "Core". So search around, I am sure there are some solutions.

Good luck and update the thread with what you end up doing to get the vehicle repaired.

I belive your Tahoe should have the 10L80 transmission, but before you do anything verify the transmission type.

P0747 Fix Info

Valve Body Upgrade Kit

Remanufactured Valve Body

Thank you so very much for all of that information. Definitely more than I have received from the dealership or Chevy themselves. My truck is fully covered on warranty. Pay big money to be covered. But in this case it’s not helping. I’m definitely going to look into these options. Again thank you

 

[Staceyr72]

The problem getting parts may because of Bulletin in link.
Parts for repair are limited but doesn't help your problem. Did dealer give you vehicle to drive?

https://static.nhtsa.gov/odi/tsbs/2024/MC-11011826-0001.pdf

No not at all. But I could have a rental that’s only covered for 6 days at $40 a day. Isn’t that beautiful? And I’ve been a customer at this dealership for 20 plus years. Just unreal

 

[Staceyr72]

Wow! Idk where you found that document. But thank you. I’ve asked them these questions a hundred times. I knew it! Chevy put that letter out Dec 2024. And now we have coverage for 150,000 miles on that part/repair and they have to give me a vehicle to drive at no charge. And I can go elsewhere for the repair and they will pay

 

[jfoj]

@Staceyr72

I just added another piece to the original post that outlines the history of NextGen Drivetrain valve body fix. If you read it, you can get an interesting perspective of how NextGen compared problems that GM had, that Ford did not have with effectively the same transmission. Sometimes indepenedant shops have a far more unique outlook and can see things due to the volume of repairs they perform.

I would bet your truck would be able to be repaired with the valve body kit they offer rather than the more expensive complete valve body they rebuild with all new solenoids and sensors.

Part of the delay is GM is probably trying to get brand new "updated" valve bodies built and into the parts system so vehicles can be repaired. But once the "new" valve bodies are shipped and installed, GM will want the original valve body from customer transmissions returned for rebuilding by a GM vendor or contractor, not likely in house at GM. Then what will be offered to dealers/customers will only be a "Rebuilt" valve body. The issue is GM needs to fill the parts pipeline with new valve bodies to get the system operational and this is why it takes so much time to get the early failures resolved.

On any repair that is under Warranty, typically GM or other manufacturers cannot deny at least partail refund to the customer if for some reason the customer cannot get to a dealer for repair. All manufacturers have some form of reimbursement option for Warranted repairs that have been repaired either by the customer or an idependant shop, but sometimes they have limits what they would pay for a specific repair and may not cover it 100%. The GM Bulletin, which is NOT a Recall, but effectively an Extended Warranty coverage clearly has some double speak in it about reimbursement for repair outside of GM. They may try to get out of it becasue they clearly state since the bulletin has been released that the repair MUST be performed at a GM dealer, but if the repair was perfomed outside of a dealer prior to the bulletin the dealer could submit for reimbursement.

If you have a good relationship with your dealership and have been going to them for years, you should bring all the info for NextGen Drivetrain and sit down with the Service Manager and figure out what he/she can do for you. NextGen may even slightly discount the parts to the dealer so the dealer can see first hand what NextGen can offer to fix your vehicle and the other one that has been down for 5 months!!! The dealer may even be willing to "eat" the repair internally just to get these vehicles back on the road, they may even say lets split the "cost" of the part, which IMHO would be worth it just to get the vehicle back on the road.

There clearly seems to be a true fix available now from NextGen but often the dealerships are blind to the big picture and are so used to following behind the farm animal in front of them they cannot consider other ways to help their customers.

I would be on the phone to NextGen ASAP and explain your situation and ask if they would be willing to sell the valve body kit to the dealer at a lower cost to help both yourself and the other customer out. The worst thing they can say is no to a discount, but I would bet they would be willing to work with you so they could show the dealer there is an option they could have in their hands in days.

I know GM did a software update on some of the transmission control modules to "detect" if this type of problem would show up and if it did, the transmission software would limit the highest gear the vehicle operate in, a "Limp Mode", to eliminate the rear wheel lock up problem and the "Limp Mode" would force owners to have the vehicle repaired. This is basically a "Software" fix or tweak for a "Hardware" problem. GM did this to eliminate a costly wholesale NHTSA Recall that would cover hundreds of thousands of vehicles. This was their work around to save money rather than properly addressing the problem for all vehicles.

Just recently GM has extended the "Software Recall" to 90,000 Cadillacs and Cameros with the same basic transmission and transmission problem. So this problem is actually bigger than just the trucks and larger SUV's. Again, a software fix for a hardware problem, or at least a software fix for a safety issue that will need a hardware repair in the long run. See links below.

Cadillac and Camero Transmission Software Recall

NBC News Article

 

[Big Mama]

@jfoj nice work!!

 

[tooleyondeck]

I don't see why it would be different being the same transmission, but the part number for a 2020 Tahoe valve body is 19433862 and RA has remans in stock. You may be able to cross-reference compatibility.

Additionally, here is your exact part number in stock (w/ core charge): https://paceperformance.com/i-23994569-24065354-10-speed-valve-body.html