Tom73

I asked AI about a recall and got this in response. Hope it helps. Yes, GM has issued multiple official safety recalls for certain trucks and full-size SUVs equipped with the 10-speed automatic transmission (10L80, 10L90, and related variants like 10L1000) due to valve body issues. The core problem matches what you described: excessive wear on a control valve (often called the feed limit low valve) inside the valve body can cause gradual loss of hydraulic pressure. This leads to harsh shifting, and in rare cases, a momentary rear-wheel lock-up at higher speeds, which increases the risk of a crash. Key Recalls • Initial major recall (NHTSA 24V-797 / GM N242454440, announced October 2024): Affected roughly 461,000 vehicles, primarily 2020–2022 Chevrolet Silverado/Sierra (1500/2500/3500), Cadillac Escalade/ESV, Chevrolet Tahoe/Suburban, and GMC Yukon/Yukon XL equipped with diesel engines. It focused on the valve body defect. • Expansions in 2025–2026: The campaign has grown to include more trucks/SUVs (both light- and heavy-duty) and additional model years. Most recently (February 2026, NHTSA 26V-085 / GM N252536750), GM added about 43,732 model-year 2022 full-size SUVs (Tahoe, Suburban, Yukon, Yukon XL, Escalade, Escalade ESV) with the Electronic Transmission Range Select (ETRS) system. Not every vehicle with a 10-speed transmission is included—only specific VINs based on build dates, engine (initially diesel, later expanded), and transmission configuration. GM has also released updated “Gen 3” valve bodies as a more permanent hardware fix in some cases, in addition to software updates. What GM Is Doing The remedy typically starts with a free Transmission Control Module (TCM) software update that monitors for wear and can limit unsafe shifts (e.g., forcing the transmission into a safer gear and illuminating a warning light). In affected vehicles, dealers may also replace the valve body with the updated Gen 3 design. How to Check Your Vehicle Recalls are VIN-specific. Go to the official NHTSA website (https://www.nhtsa.gov/recalls), enter your VIN, and it will immediately show if your truck or SUV is included in any open recall. You can also contact a GM dealer or call GM customer service (1-888-988-7267 or the brand-specific line) with your VIN. Owner notification letters for the latest expansions were scheduled to begin mailing around late March 2026. These are active safety recalls (not just TSBs or service bulletins), so the repairs are free. If you’ve been experiencing valve body problems, get your VIN checked right away—repairs have been rolling out in stages, and parts availability has improved but can still vary by dealership.

Okay, so airflow is top to bottom. Thanks.

Does not work if filter was pulled without noting the orientation.

Simple question. For the cabin air filter, what direction is the air flow? Top down or bottom up?

Were you told why yours was not a part of the recall? You may want to call GM customer service. Here is a link to the recall info: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019752-0001.pdf Good luck.

Now that I read a bit deeper it does not matter about the insert as all the manual says is to check the oil cap for what oil to use. Sorry for dredging this post back up.

One last question and I will let this thread die. Had my recall completed, passed testing, oil & filter change, and new oil cap. Just missing the owners manual insert. My dealer knows nothing about the insert, just gave me a print out showing the recall was completed. Does anyone know if that insert is anywhere on the web so I can print a copy? Or does anyone have a copy that they are willing to scan and post? Any assistance appreciated.

The specified oil, Mobil 1 Supercar 0W-40, is about $6/qt more than the standard 0W-20. Since the truck takes 8 qts that would be $48 plus tax.

At last my truck got in for testing. It passed, now have heavier oil and a new oil cap. And a 150K warranty on the engines lower end Now I’ll have to endure oil changes that are $50 higher in cost.

5 days, did the seller provide any kind of warranty?

Here is some info from GMAuthority about the expanded investigation: https://gmauthority.com/blog/2025/10/nhtsa-probing-gm-6-2l-v8-l87-engine-failures-not-involved-in-recall/ A new federal investigation now targets a persistent problem with GM's popular 6.2L V8 L87engine. The National Highway Traffic Safety Administration (NHTSA) has launched an Engineering Analysis after receiving hundreds of complaints of catastrophic engine failures in vehicles that the high-profile GM recall excluded. This probe places a glaring spotlight on a powerplant that General Motors installs in its most profitable and popular full-size trucks and SUVs. The agency’s Office of Defects Investigation (ODI) confirms it has received 1,157 reports of engine bearing failures. While GM previously acknowledged a supplier-related issue, issuing recall 25V-274 for certain 2021-2024 models, the new action addresses a disturbing trend. A total of 173 failure reports involve vehicles built outside that specific recall window, including 2019–2020 model year Chevy Silverado 1500 and GMC Sierra 1500. The continued high volume of reports from owners of these unaffected vehicles forced the agency’s hand. ODI stated this situation "presents a potential safety risk that warrants further investigation." GM had blamed the earlier problem on "multiple supplier manufacturing and quality issues," leading to the recall. The closure of the initial Preliminary Evaluation, however, did not stop the reports of failed engines. The new Engineering Analysis will determine if the root cause extends beyond the previously identified supplier defects and whether GM must expand its repair campaign. This deeper investigation seeks to fully assess the safety implications for thousands of owners whose vehicles currently sit in a regulatory gray area, their expensive engines potentially facing the same fate as the recalled ones. For reference, the L87 recall from earlier this year addresses a critical defect in the V8 engine that can lead to sudden engine failure and loss of propulsion, presenting a serious safety risk. General Motors launched this action following a federal investigation, ultimately recalling nearly 600,000 full-size trucks and SUVs from the 2021-2024 model years. The core of the problem lies in manufacturing defects within the L87 engine's connecting rod and crankshaft components. Issues such as sediment in oil passages and out-of-specification parts can cause these components to fail, often with little to no warning. This can result in a catastrophic engine seizure or even a connecting rod breaching the engine block, destroying the powerplant and abruptly halting the vehicle. The remedy from GM involves a two-part solution: dealers will inspect vehicles and replace engines that don't pass. For vehicles not yet displaying failure symptoms, the fix includes changing to a higher-viscosity oil, installing a new oil filter, and adding an updated oil cap to reflect the newly recommended viscosity.

No power, just jump it and hit open to get tail gate open. Wouldn’t that be much easier then the steps above?

See post #2 above: “if an engine failure occurs in the vehicle as a result of the condition described above…”

Check this posting on NHTSA: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019752-0001.pdf Look at special coverage on second page. Here is the text: This special coverage covers if an engine failure occurs in the vehicle as a result of the condition described above for a period of 10 years or 150,000 miles (240,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.

A 3rd gen valve body is now out per GM Authority. ………………………….. Last month, GM Authority reported that GM was in the process of launching a redesigned valve body for the ten-speed automatic transmissions used in its full-size pickup trucks and SUVs. Now, we’re back with a few more exclusive details about the new, third-generation GM valve body. Gen 3 Naming First and foremost, GM is officially referring to the new valve body as Gen 3 or “third-generation valve body assembly.” For those questioned the terminology in our initial report, the new GM valve body – as you’ll see below – has received a not-insignificant redesign compared to the outgoing part. Transmissions & Part Numbers The new GM Gen 3 valve body assembly is for T1 platform vehicles equipped with GM’s Hydra-Matic 10L60, 10L80, and 10L90 10-speed automatic transmissions used in the automaker’s light duty full-size trucks and SUVs, including: Chevrolet Silverado 1500 Chevrolet Tahoe Chevrolet Suburban GMC Sierra 1500 GMC Yukon GMC Yukon XL Cadillac Escalade Cadillac Escalade ESV Valve Body Part # Note Gen 1 24044193, 24047996 First-gen, discontinued Gen 2 24065353, 24065354 Second-gen, discontinued Gen 3 (new) 24071206 3.0L LM2 / LZ0 Diesel Gen 3 (new) 24071207 5.3L V8 Gasoline, 6.2L V8 Gasolne Note that the 10-speed and Allison-branded 10-speed automatics used in the Silverado HD and Sierra HD use a different valve body. What Actually Changed? Prior to the Gen 3 part, GM was running the Gen 1 valve body (part numbers 24044193 and 24047996), which exhibited all kids of issues and failures that led to its eventual discontinuation. It was replaced with the Gen 2 valve body (part 24065353 and 24065354), which marked a slight improvement but exhibited a condition that resulted in excessive bore wear that caused failures. In 2024, GM went on to make a key material change to this valve body design in order to resolve the excessive bore wear condition. Despite this change, GM didn’t change the part number. While this material change resolved the excessive bore wear issue, it still presented issues, causing GM to embark on a complete redesign of the valve body. The result of those efforts is the Gen 3 GM valve body (part numbers 24071206 and 24071207). This new, third-generation unit includes the material change made to the Gen 2 in 2024, while also making “various other improvements”. Citing competitive reasons, GM didn’t specify what it changed for the Gen 3 hardware. From what GM Authority has observed so far, vehicles equipped with the new Gen 3 GM valve body are presenting with substantially smoother shifting behavior and fewer failures, though it’s still relatively early in the Gen 3’s lifecycle to make any conclusive determinations on the latter. Availability GM has discontinued the Gen 1 and 2 valve bodies, with dealers now switching entirely to the Gen 3 assembly for service repairs, and assembly plants now using the new hardware. Availability of the Gen 3 part is rapidly improving, which should come as great news for customers who have had their vehicles waiting on parts, sometimes for weeks or even months. Here’s to hoping that third time’s the charm!