Power Train Problems of Chevrolet Tahoe - part 1

I have a 2021 Tahoe that while circling a parking lot at my son's football practice. The Tahoe's emergency came on and the Tahoe abruptly stopped. A checked engine light came on. The Tahoe wouldn't release the emergency brakes. I was finally able to get it released. I took the vehicle to a transmission shop because I plugged obd scan tool on it. It had two transmission codes. One generic and one for the vavle body. The transmission shop said they have had lots of Tahoes with the vavle body's going out. They told me about n242454441. I called Chevrolet and they advised me that wasn't for my Tahoe. I asked why and they said they don't know. If this is effecting the desiel only models then why is mine doing the same thing. Parts cant be ordered either. Please look into this matter.

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Gear slip and shutter when accelerating loss power from taking off.

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Rapid deceleration at 55mph on highway, followed by console message "reduced acceleration" with check engine light. Fortunately rolled into dealer within a mile. After analysis, they stated the transmission valve body and electronic control component needs replacement over $3,000. After tax. No warning signs prior. Ntsb recall n24254441 covers only diesel engines not gas with same problem in 10 speed transmission.

This is an amendment to campaign 11684444 as there is some inaccurate info as it pertains to the diagnostic- 2021 Chevrolet Tahoe, driving 25 mph, in the neighborhood, my Tahoe kicked into neutral and abruptly stopped in the middle of the street. I immediately tried to restart it, however it would not start. After about 15 minutes, we tried again and it started enough to make it back to my in laws house, where it remains parked today. We did a diagnostic test and received the code for fuel pump control module failure. Contacted the Chevrolet dealership I bought my vehicle from and they indicated this is a common issue and the part is on back order. This is a very dangerous risk to safety and should be covered under a recall. I've seen where GMC issued a recall for the exact same issue, but only for Tahoes with 6. 2l v8 engine; mine is 5. 3l. I am confused why that matters as it poses the same safety risk across the board. Very dangerous. Please consider this as a recall.

I am writing to formally document serious engine defects I have experienced with my 2021 Chevrolet Tahoe equipped with the 5. 3l l84 v8 engine. 1. Crankshaft failure omy Tahoe suffered a catastrophic crankshaft failure that required major repair/replacement. Oi am aware that gm has recalled certain vehicles equipped with the 6. 2l l87 engine for crankshaft and rod-bearing defects. Obased on my experience, the same or a very similar defect has also occurred in my 5. 3l engine, which is currently not included in that recall. 2. Valve lifter failure oin addition, my vehicle has suffered from valve lifter collapse—a well-documented problem in 2021–2022 gm trucks and suvs with both the 5. 3l and 6. 2l engines. Othis caused severe misfiring, drivability issues, and expensive repair needs. Why this is a concern: •both failures occurred well before what would be expected of a modern engine. •the crankshaft failure raises a safety risk: sudden loss of propulsion while driving could lead to accidents. •the lifter issue is widely reported by other owners and has been the subject of gm service bulletins. •taken together, these problems suggest systemic defects in the 2021 Tahoe’s 5. 3l engine that have not been adequately addressed by gm. Requested action: •I ask gm to extend recall and warranty coverage to include the 5. 3l l84 engine in addition to the 6. 2l l87. •I ask NHTSA to consider investigating whether the scope of the current 6. 2l recall should be broadened to include 5. 3l engines, given failures like mine. •at minimum, I request assistance in covering repair/replacement costs for both the crankshaft and lifter defects, which are clearly not due to normal wear and tear. Vehicle details: •year/make/model: 2021 Chevrolet Tahoe •engine: 5. 3l v8 l84.

Transmission valve body failure after factory warranty expired.

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While driving on the expressway I heard a rattling noise coming from my undercarriage, by the time I got off my exit the sound got louder, I attempted to make it home and when I pulled in my driveway, and popped the hood, fluid starting pouring out the bottom as well as splashed on other components. Upon further inspection it was determined that the fluid was coolant. There was no dashboards lights or warning signs indicating that something was wrong or that my car was at risk of overheating. I had the vehicle towed to an auto repair shop and the following was diagnosed and repaired: •water pump •cooling system •engine water pump •engine coolant thermostat housing assembly. •serpentine belt.

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The contact owns a 2015 Chevrolet Tahoe. The contact stated that on several occasions while driving at various speeds, the transmission shifted hard occasionally, and the vehicle jerked abnormally. Additionally, on one occasion while shifted in reverse(r) the vehicle drove forward. The gear shifter was shifted to park(p) and then reverse, and the vehicle reversed as intended. The contact inspected the transmission fluid, and the transmission fluid level was low. The vehicle was taken to an independent mechanic where it was diagnosed that the torque converter had failed, and the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 157,000.

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This is the 5. 3 and not the 6. 2. The vehicle turned off and switched to neutral while driving, that almost caused an accident. Dash displayed engine/transmission failure. Vehicle became a boat anchor and was towed to dealership. Possible transmission valve body issue.

Torque converter needed to be replaced, and then a week later still had the same shuttering and loss of power and the valve body needed to be replaced. Got it back and it still is shuddering and hard shifting.

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On 01/03/24, the vehicle stalled and smoked on the suncoast parkway. All dashboard warning lights and messages illuminated, and the vehicle entered emergency park mode. Onstar was contacted and the vehicle was towed to jenkins Chevrolet in homosassa, FL. The failure was linked to a broken pulley and belt system that damaged the ecm and wiring harness. No dtcs were pulled, and mileage in/out was 80042/80043—no test drive performed. On 08/06/24, the vehicle returned to jenkins for a roaring noise. A pulley bearing was replaced, possibly related to the earlier failure. Again, no drivability evaluation or codes recorded. On 03/09/25, the same full system warning lights/messages appeared again. The vehicle experienced harsh shifting and delayed acceleration. It was taken to autonation Chevrolet south clearwater on 03/10/25. Dtcs (p0700, p0717, p2714, p2716, p0706, and u-codes) were found but dismissed. Only the battery was replaced. Mileage in/out was 99494—no test drive performed despite claims one occurred. On 07/08/25, the vehicle again showed full dashboard warnings. Brought back to autonation on 07/09/25. On 07/14/25, customer received a $9,177. 85 estimate including full transmission replacement. Safety was at risk due to repeated stalling, loss of acceleration, and emergency parking mode while driving or merging. These failures could have led to accidents or left the vehicle disabled in traffic. Driver and children were present during each incident. The vehicle is enrolled in onstar and the mychevy app, which provide monthly health reports. Despite these incidents, no faults or warnings were ever shown in the reports. Vehicle remains available for inspection. A case is open with gm. Across 4 service visits, gm-certified dealerships failed to follow proper protocols, including code checks, drivability assessments, and test drives—contributing to delayed diagnosis of transmission failure.

The affected components are the electrical system, engine, and power train. In March 2025, my 2021 Chevrolet Tahoe displayed multiple warning lamps across the dash, including traction control and check engine lights. The vehicle shifted erratically and sometimes entered limp mode. I brought the vehicle to autonation Chevrolet south clearwater for inspection. The dealer replaced the battery, dismissed my concerns, and stated that a test drive was performed, but the mileage in and out on the invoice was identical, showing it never actually occurred. Diagnostic trouble codes (p0700, p0717, p2714, p2716, p0706, and multiple u-codes) were present but were not fully investigated. A gm technical service bulletin (21-na-149, December 2022) covers these exact symptoms (caused by engine wiring harness chafing), but it was never referenced or applied. Because the problem was not addressed, the condition worsened. By July 2025, the vehicle suffered a complete transmission failure. At that point, the dealer confirmed the issue, documenting transmission slipping, shuddering, noise, and additional codes (p0700, p077c, p17f6, p17fb, p1872). Gm increased its goodwill contribution from 15% to 40% of the $9,925 repair cost, while autonation offered only $500 despite their role in the missed diagnosis. Safety risk: my family and I were at risk each time the vehicle stalled, lost power, or shifted erratically while driving, including at highway speeds. These failures created a significant risk of collision. The drivability problem was not properly confirmed in March 2025 despite multiple codes being present. By July 2025, the dealer acknowledged and confirmed the transmission failure. The vehicle remains available for inspection, and I have retained all invoices, diagnostic reports, and communications with gm and the dealership.

The affected systems are the power train, engine, and electrical. My 2021 Chevrolet Tahoe experienced failures consistent with gm technical service bulletin 21-na-149 (engine wiring harness chafing) and the conditions outlined in recall n232404190 (valve body failure, November 2024). Beginning in March 2025, the vehicle displayed warning lights and messages including check engine, traction control, service transmission, and limp mode (reduced acceleration – drive with care). The vehicle shifted erratically, lost power, and occasionally failed to accelerate, creating a serious safety hazard at highway speeds. These problems were documented at autonation Chevrolet south clearwater, where multiple diagnostic trouble codes (p0700, p0717, p2714, p2716, p0706, and u-codes) were recorded but not properly investigated. No test drive was performed despite being claimed by the service technician, and the applicable TSB was not referenced. By July 2025, the condition worsened into a complete transmission failure, with additional codes (p0700, p077c, p17f6, p17fb, p1872). The dealer’s estimate required a full transmission replacement at nearly $10,000. Gm reviewed the case through its internal policy evaluation tool and increased goodwill assistance from 15% to 40%, while autonation contributed only $500. Gm’s partial contribution confirms the defect is recognized, yet this VIN remains excluded from the official recall. This issue placed my family and other motorists at significant risk, as sudden loss of power and shifting failures occurred during normal driving conditions. Dealer records, gm documentation, and photographs of warning messages are available. I request that NHTSA expand recall n232404190 to include affected vins such as mine, since the symptoms, diagnostic codes, and confirmed failures match exactly what gm has already identified as a known safety issue.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly downshifted to a lower gear. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the transmission valve body had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 39,000.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that the vehicle displayed "reduced power," and the rear wheels started to lock-up. The contact was able to keep control of the vehicle and continued driving. The vehicle was taken to the dealer, who completed the repair under NHTSA campaign number: 24v797000 (power train). The contact stated that after the recall repair, while leaving the dealer and driving approximately 10 mph, the vehicle veered off to the right and ended up partially in the next lane. The contact stated that the vehicle unintendedly shifted into neutral, and the message to "press start again" was displayed. The contact was able to restart the vehicle and parked the vehicle in a nearby parking lot. The contact restarted the vehicle and drove back to the dealer. The failure recurred twice while returning to the dealer. The dealer diagnosed that there was a fuel pump drive failure. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed the VIN was no longer under NHTSA campaign number: 24v797000 (power train). The manufacturer opened a case. The failure mileage was approximately 69,000.

Transmission issue. Vehicle has the duramax diesel with 10-speed transmission. I am aware of issues with earlier year/s transmissions. I have experienced shuddering, jerking, a single momentary rear axle lockup. Jerky engagement from drive to reverse and or back. Reduced acceleration warning on display. Check engine light comes and goes. Waiting for dealer to further inspect, drain fluid, etc. It appears from the VIN check that this vehicle had some metal work/paint prior to delivery to selling dealer, paint does not match. The transmission issue at 15,000 miles is just plain scary and not what one expects. That this vehicle sold as a 2023 has same issues as earlier model years makes me wonder if this is in fact a late 2022 model with the known defective transmission valve body? any help appreciated.

The contact owns a 2017 Chevrolet Tahoe. The contact stated that while driving on the highway at 70 mph, the vehicle lost automotive power. There was no warning light illuminated. The contact was forced to pull over and had the vehicle towed to a local independent mechanic where the vehicle was diagnosed, and the contact was advised that the transmission was faulty and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 128,000.

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While traveling on the highway, the vehicle suddenly lost all power. The gas pedal became unresponsive, and the engine ceased functioning entirely—without any prior warning or indicators. I was forced to coast into a nearby parking lot to prevent a potential collision. This incident put both myself and my child at serious risk of injury or worse, had it occurred at a higher speed or in heavier traffic. Once stopped, the vehicle would not restart. I had no choice but to have it towed to the dealership for evaluation. A week later, the dealership diagnosed the issue as a locked-up engine, confirming that a full engine replacement is necessary. Unfortunately, the replacement engine is currently on backorder, and they are unable to provide an estimated time of arrival. To make matters worse, the dealership has no loaner vehicles available for at least a month. Gm only offers a rental reimbursement of $44 per day, which is significantly below the cost of even a basic rental vehicle in our area ($74/day). This leaves me with limited transportation options, even though I am currently making monthly payments of over $1,400 on a vehicle that is completely unusable. Adding to the severity of this situation, the vehicle is also subject to a manufacturer recall, but no remedy or parts are currently available to resolve the issue. As a parent of multiple children, this entire experience has left me shaken. I cannot begin to imagine the consequences had this failure happened at a higher speed or in less forgiving conditions. I am extremely concerned for my family’s safety going forward. Gm has stated they will not extend or provide additional warranty coverage until the repair is complete, which leaves me feeling unprotected and anxious about the future reliability of this vehicle. The absence of warning signs and the total loss of power while driving make this a critical safety concern that must be addressed. I urge NHTSA to hold the manufacturer accountable.

Recall issued by gm (n25249000/NHTSA 25v274) on powertrain/crankshaft and took car to gm dealer and was refused service or safety inspection. Told that they were told by gm not to inspect or service vehicle at this time. How can a safety recall be issued but gm not be ready to inspect or remedy issue?.

Engine light came on. Flagged for a bad transmission valve body. Informed by dealership that the piece is on backorder and has been on back order for months.

Several times we will be driving down the road and it feels like the vehicle is trying to shift into park and the tires lock up. Then it goes into a mode where acceleration is limited.

Transmission failure at 110,000 miles. No warning lights, no codes. The transmission was slipping during acceleration, random rpm bouncing at a steady speed, acting lost in gears, slow power up hills then takes off. Currently sitting at a chevy dealership.

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The contact owns a 2019 Chevrolet Tahoe. The contact stated that while driving approximately 25-30 mph, a message advising that the transmission fluid was overheating and to pull over was displayed. The contact coasted to the side of the road where, the vehicle became inoperable. The vehicle was towed to a certified mechanic, who diagnosed that the transmission fluid was burnt, causing the transmission to slip while switching gears. The mechanic informed the contact that the failure was a known issue and to contact the dealer. The dealer was contacted and informed the contact the VIN was not included in a recall. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed that the VIN was not included in a recall. The manufacturer referred the contact to the NHTSA hotline to file a vehicle safety complaint. The failure mileage was 100,000.

My 2023 Tahoe with 76,000 miles went into limp mode and activated an engine light. The vehicle was taken to the dealership and had the code p0747 which is pressure control solenoid a is stuck on. The dealership technician is recommending a valve body replacement to repair this problem. This is a known problem by general motors and has extended it to the 2022 models only. This is a safety concern that is causing rough irregular shifting, and a engine light to occur.

I noticed the gears of my Tahoe grinding when I would let off of the gas pedal. Eventually my check engine line came on. I brought it to my chevy dealership. Upon inspection, I was told that my transmission valve body was bad and that I needed a new one. I was then told that my truck was ok to drive. I drove it for roughly another month until the check engine light came on again, and I heard the same sounds (I was able to catch it on video). This time, my truck would not want to accelerate past about 1. 5 rpms. I brought it back to the chevy dealership which is where my truck is today. In hindsight, I believe I should not have been allowed to continue to drive my truck with a bad transmission part.

Check engine light came on. Upon diagnosis', the engine is misfiring, lifters are not performing correctly and there are critical engine alerts and an estimate of 11,000 to fix. 2021 - 83,000 miles v8 - 5. 3 not the 6. 2 and no one will help me bc my power train expires. I am the only owner. Second brand new Tahoe ai bought from this dealership and they are doing nothing to help.

In may 2025, my 2021 chevy Tahoe experienced transmission failure related to the valve body. The vehicle has now been at the dealership (richard Chevrolet in cheshire, CT) for over 2 months with no timeline for repair due to a national backorder on the part. This issue is widely reported among 2021 Tahoes and other gm vehicles, and appears to be a systemic transmission defect. I was never notified of any recall or service bulletin, and I’m still making monthly payments on a vehicle that is inoperable. The rental provided does not suit my family’s needs, and gm has been unable to offer a resolution or clear update. This type of critical drivability failure should be classified as a safety concern, especially considering the volume of similar complaints and the absence of repair parts. I am requesting NHTSA investigate this issue further and take action if warranted.

2022 Tahoe rst with 5. 3 10 speed. Bought new in sept of 2021. The 2022 we have had problems with shuttering in the drivetrain from very low miles. We have brought it into the dealership atleast 3-4 times before for this issue. This was all while it was still under its 60k drivetrain warranty. Dealership always told us that since there was no check engine light or codes that they can’t fix what is not broke or broke yet. We needed to wait for it to break or light then bring it in. We also received a letter in the mail for the trans recall (program)last year which was preformed. That day after, my wife started to notice it shuttering more than usual and more often. I call the dealership that performed the recall which they said to bring it in. After looking it over. I get a call saying that I should get the transfer case fluid, front and rear diff fluid changed. It might be the transfer case slipping. Advisor told me that since it was about due for this service. Fast forward to may 9th of this year. My wife was at church. She parked it which it ran fine. Came out about 30-40 mins later put it into drive and wheels where locked up. She called me panicking that something was wrong. Go to her aid which I had to have it towed to the same dealership that serviced it before. Even check it in with the same advisor that helped us before after the recall issue. I should now mention our 22 Tahoe has 68,700 miles. Dealership called us a few days later saying it was the valve body. Especially since we had have problems before with the drivetrain and documented. The vehicle is still inoperable. We are waiting for a valve body with no eta.

Shuttering started with transmission which ultimately lead to the transmission failing at 140,900 miles. Costly repair for a vehicle that was serviced regularly.

The contact owns a 2022 Chevrolet Tahoe. The contact stated while driving at an undisclosed speed, the contact noticed a loud knocking sound coming from the vehicle and the vehicle jerked abnormally. The accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. There was no warning light illuminated. Additionally, the contact stated that the gear shifter failed to operate as intended and the vehicle failed to shift into reverse. The vehicle was driven to the residence. The vehicle was scheduled to be towed to the dealer. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 85,000.

My wife drove the 2024 Tahoe with 13,464 miles to florida for a beach trip with the kids. The car stopped working while she was driving. The vehicle flashed and the automatic transmission wasn’t changing gears. She manually shifted the gears until arriving at a safe place. The dealer states it is the transmission valve body that needs replaced. The part is on back order and from what the dealer said being built as needed.

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The contact owns a 2018 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the vehicle began to shake excessively, prompting the contact to discontinue driving the vehicle. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The vehicle was repaired, but the failure reoccurred. The manufacturer was not notified of the failure. The failure mileage was 80,000. The VIN was not available.

Our 2023 3l diesel Tahoe had 63,000 miles on it and went into limp mode (cel on) in late April 2025. We took it to the dealership and they diagnosed the valve body as the problem. We continued to drive it (as they mentioned it would be months before a replacement part would be in) while I did some research and discovered the magnitude of the problem. Just google it! meanwhile, the rear wheels locked up on me after I had picked up our two children from daycare. It felt like we had a log chain hooked to our hitch that snapped us back - really hard! felt like we had been rear-ended. This could have easily caused us to get in an accident, or worse, but thankfully we were not in heavy traffic. Our dealership was able to provide us a loaner truck. Approx. 50 days later, we were informed that we were approved for a new transmission - which was also on backorder! almost 80 days later, our new transmission has arrived and been installed. We are very disappointed with how gm has handled the issue. We were lucky our dealer provided a loaner, as many have not. There are after-market providers who clearly state the upgrades they've made to the valves bodies, and while gm says they've upgraded the ones they make now, they won't share any details. I'm aware of this same limp mode/rear wheel lock up happening multiple times (on the same vehicle) to people in very low-mileage vehicles (less than 1000 miles). This isn't a small problem, and gm knows it. We will see how far we get with this "new" transmission, but as you could guess, I don't have high hopes! I just pray that no one gets killed.

While driving in traffic the rear wheels suddenly locked up and the tires left skid marks on the road, l was lucky l didn't get hit from behind. L was told by an auto repair shop something inside the transmission failed.

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Engine replacement at 13,260 miles due to thrown rods in cylinders 7 and 8 in September 2023. The vehicle is currently at the dealership again at 32,000 miles due to transmission issues. No eta on replacement parts. Up to date on all maintenance and oil changes.