A growing number of GM truck and SUV owners are facing major service delays as the result of a nationwide backorder on transmission valve bodies.
As covered previously, some vehicles may experience a momentary rear-wheel lock-up as the result of a control valve failure, which could stem from a miscommunication between the transmission and the transmission control module software. The issue may potentially impact all ICE-powered full-size GM truck and SUV models, including both diesel- and gasoline-powered variants.
Per previous GM Authority coverage, General Motors initiated Special Coverage N242454441 on November 26th, 2024, covering transmission control valve body repairs for a 15-year/150,000-mile period, whichever comes first. The Special Coverage is linked to GM Safety Recall N242454440.
Impacted GM truck and SUV units include the following vehicles produced for the 2019 model year and later:
- Chevy Silverado 1500
- Chevy Suburban
- Chevy Tahoe
- GMC Sierra 1500
- GMC Yukon
- GMC Yukon XL
- Cadillac Escalade
- Cadillac Escalade ESV
Any unit equipped with either the GM eight-speed automatic transmission or GM 10-speed automatic transmission may be impacted by this issue.
Unfortunately, repairs are being held up due to a national backorder on the transmission control valve. GM has yet to provide an estimated timeframe for the part’s availability, leaving many customers in limbo. Reports from affected owners cite wait times ranging between six weeks to more than seven months, with one owner stating that a dealer told them it would be about a year before the part was available:
“It’s now almost April. My dealer has been waiting on a valve body for my brand-new Silverado since December [2024]… no ETA,” writes one owner.
“I waited a month and a half, but I got lucky. Others are waiting much longer,” writes another.
The comments go on and on:
“Took me just over four months to get mine.”
“I’ve been waiting almost two months for my brand-new truck, a 2024 Chevrolet Silverado with 8,000 miles on it.”
“Was just told the valve body on my transmission is out. They told me I could be waiting up to a year.”
“Got a call from GM customer service today…they are finally shipping the valve body after three months of me b#tc#ing and eventually ended up in the priority list.”
In certain cases, some dealerships are securing full transmission replacements, with one owner sharing that after seven months of waiting, GM approved a replacement transmission rather than waiting for the backordered part.
We’ll provide further developments on this story as we receive them. Stay tuned.
Comments
Never had this problem with the first car my Dad bought me in 1970 for $600. It was a ‘66 Malibu coupe with a 283 two barrel with a 2 speed powerglide transmission. Vehicles are far too complicated with poor quality parts these days
DAVY….One of my best friends in high school father bought him a Brand new 1966 Malibu for graduation. Same equipment. That was a great little reliable car. He came to me one day and said the throttle pump rod had broke. I only had a brass rod to repair it with and I told him to take it to the dealer. That brass won’t last. It didn’t and he was mad at me till the summer after graduation…It was a pale yellow with black interior.
Hey Mary, who’s getting fired? VP’s over QC and Supply Chain should probably be first. You/they are destroying GM in two ways. First, the recall and warranty costs have to be huge. Plus, you are driving return customers away by the thousands as they deal with non-running vehicles, inconvenience, and wariness of future purchases.
GM, Ford, and STLA are ALL having issues. Just that as GM sells more vehicles, their problem is bigger. A good dealer will ensure they have enough transmission repair bays and lifts to do this work! In the later 1990s, our shop had one transmission guy with four service bays, three with body-contact lifts to swap out THM700s, as we installed SRTA (Service Replacement Transmission Assys) from GM Parts in those cars. Cheaper to do it that way, than to pay parts and labor for a teardown and rebuild.
Unfortunately(??), people expect BETTER for the price of modern vehicles, which I fully agree with!
Stange to go back to MY 2019, though. There goes GM’s stock dividends for a while.
what good are repair bays and lifts if valve body parts are nowhere to be found?
exactly…starting with Mary—she needs to get her house in order—there’s too many recalls, failed parts under warranty, screwed up new car ordering / constraints, etc…
step down Mary
The requirement for “working computers” is beyond reason. I have decided to only buy older vehicles without the damn things and fix them myself. I start work soon rebuilding my old 68 Fiat 124 that hasn’t run in 40 years but other than machine shop work can be repaired stem to stern using the owners manual and literally a standard tool box. Fiat has only “two special tools” which I have; a guide for putting the transmission back onto the engine, and a “fork” that holds valves open while you hand push the car in high gear to rotate the crank a little and change tappets to adjust the valves. A high school kid can do that. ( Some new cars wont even open doors if the computer is out and some dont even have a key for one door to get in! Beyond stupid.
ARE some dealerships just replacing them because its a blank check? we have not replaced one yet just been doing reprograms….curious?
My daily driver is a 2012 Silverado that I purchased new. It has been flawless but I’m ready to write a check for a new one but I’m wary that the new one won’t be as reliable as the old one.
Get a 2026 Silverado. As the bugs should be worked out by than. The 2027’s will be all brand new bodies/ Engine which will come with their own new issues. 2026 is the year to buy a Silverado.
I have been putting off replacing my 2013 Sierra Denali HD for two years now. I will not spend close to 100,000 dollars on a vehicle that I will not have to worry about the engine or transmission failing. gm is no longer my first choice in buying a new vehicle, truck or car.
I still live with my parents
What? Who?
in their basement? Does mom do your laundry as well?
Yes and I’m incapable of any constructive criticism and accepting different viewpoints.
Paint this any way you want. This is costing GM big bucks and customers both current and future.
My son-in-law waited 2 months Aug 2024, then in Oct 2024 they replaced the whole transmission because they couldn’t get a valve body. 4 months later the valve body went on the replacement transmission! They were able to replace the valve body in 2 weeks. This was for a 2023 Sierra 1500 with 27K. Good grief.
Yup, that’s why I’m in no hurry to replace my 2012.
G M, marc of ex-lax
Just ordered a Sierra 2500HD. Guessing it’s also affected since it has the 10sp tranny. Is this issue delaying Ft. Wayne assembly?
I’m not sure the HD trans are having the issue, and I don’t see them on the list above.
I must be getting old because all I hear are “module…..module…..module…….module”.
Older cars FTW
Welcome to General-Mediocrity quality.
Yep, this is really happening. My brand new 2025 Yukon Denali has been in the shop 5+ weeks waiting on the valve body to be replaced. Nobody at GM can tell me when they expect the part to come in. With less than 1,000 miles on it, why would this happen? it’s clearly an old problem and obviously they haven’t done anything to rectify it.
if GM was required to pay the vehicle payments while at the dealership this mess wouldn’t be happening.
I am waiting 3 weeks for transmission lines for my 2020 pickup 1500.
These vehicles are way too expensive even if they were reliable, which they are not! I have am keeping the vehicles I have and as I’m in my 70s I am taking care of them with the intent of making them my last as long as I can drive.
Mary doesn’t care. The answer is to do a stop build and send all your valve body production to service parts. It would be expensive but it’s the right thing to do. Otherwise the valve bodies will be built as they normally are for service which means “not very fast”.
I cannot understand this recall. I was sent two notices that my TCM need to be re-programmed I only experienced one issue since new and that was a big jolt when I placed the tranny in reverse. I went through the standard TCM reset procedures and it totally corrected the issues. Since that time I have experienced smooth shifts and a jump in gas mileage by one mile to the gallon. What gives!
The recall is not to replace the valve, but to reprogram the TCM to monitor for the condition. Replacement is only required if TCM has already failed or the software detects a potential failure.
This means that the article vastly overstates scope of the parts backlog since no numbers are provided. A few customer quotes cannot be extrapolated to mean, as the article implies, that EVERY TCM must be replaced NOW. Without data, it’s just an opinion.
My question is, ‘Are the replacement valve bodies, an improved design?’
When you can’t even fix the garbage you’re selling tariffs don’t matter. Why buy junk?