general problems of the 2020 Chevrolet Silverado 1500 - part 2

This is a recall remedy failure report under 49 u. S. C. §30120. My 2020 Chevrolet Silverado 1500 (VIN: [xxx] ) received recall 24v797000 on June 9, 2025. The ecm update is intended to detect incipient clutch-pressure or gear-ratio deviations—early signs of a developing slip—and automatically force limp mode to prevent rear-wheel lockup. On August 23, 2025, after the recall was performed, the truck experienced rear-wheel lockup at highway speed. Limp mode did not activate, which shows the recall remedy failed to operate as required. Mangino Chevrolet documented symptoms matching the recall defect, including abnormal ratio behavior. No metal debris was found in the pan, indicating the failure was not caused by wear. Gm tac also noted behavior consistent with a developing slip. Gm first recommended full transmission replacement at my expense before acknowledging the recall. Gm later authorized a valve-body replacement, which also failed. The dealership owner provided a written statement confirming that: (1) the recall remedy did not correct the defect, and (2) the valve-body repair did not correct it. On December 3, 2025, gm customer assistance attempted to close my case as “not recall-related,” despite the post-remedy lockup, limp-mode failure, dealer findings, and the written admission that the recall remedy was ineffective. The safety defect persists after recall completion, and gm has not provided a remedy that corrects it, as required under federal law. I am reporting this as a failed recall remedy and an ongoing safety defect. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The transmission is locking up at speed causing a significant jump/ lurch in the rear end momentarily that sudden causes lane change. The dealer is telling me this is related to the transmission valve body recall however I received no warning and my truck has never gone into limp mode even though the recall remedy was supposed to provide a 10k mile warning. It would seem the determining factor is not being measured correctly or there are other contributing factors that are not being considered. This seems very dangerous and happened six times over the course of five miles before I could get the truck home and off the road.

Dear NHTSA office of defects investigation: I am filing this formal complaint regarding general motors' failure to provide a timely remedy for safety recall xxx and gm's inadequate response to a catastrophic transmission defect that has affected my vehicle twice, resulting in complete transmission lockup while driving at highway speeds. *safety incident history my 2020 Chevrolet Silverado 1500 has experienced the transmission control valve defect described in recall xxx on two separate occasions, both while driving at approximately 65 mph on the highway. Each incident resulted in complete rear wheel lockup, creating an immediate life-threatening situation. Following the second failure, I had the vehicle towed to huffines Chevrolet plano [xxx] ) on August 18, 2025. Unreasonable delay in recall remedy as of today, October 6, 2025, my vehicle has remained at the dealership for 49 days with absolutely zero action taken toward repair. The vehicle has not been evaluated, diagnosed, or repaired. The dealer states they have only one transmission technician to handle the massive volume of recalled silverado trucks affected by this defect. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Am writing to formally report a transmission failure in my 2020 Chevrolet Silverado 1500 and to request your assistance in addressing this issue. I purchased the vehicle on September 2020from suburu cobband it currently has approximately 143,000 miles on the odometer. Recently, the truck began experiencing serious transmission-related issues, including total failure. These issues developed without warning and have rendered the vehicle unreliable and unsafe to operate. After inspection by alm chevy, I was informed that the failure likely stems from a known issue with the torque converter or transmission valve body — problems that have been widely reported in 2020 silverado models with the 8-speed automatic transmission. I have also learned that gm issued a recall for certain 2020–2022 models due to excessive transmission valve wear, which may cause the rear wheels to lock up. I am concerned that my vehicle may fall within the scope of this recall or a related technical service bulletin (such as TSB 21-na-199). Given the seriousness of the failure, the relatively low mileage, and the widespread nature of these transmission problems, I believe this may be a defect in materials or workmanship. I respectfully request the following: confirmation of whether my vehicle is subject to any open recalls or service bulletins relating to the transmission. A warranty or goodwill repair of the transmission or related components. If parts are unavailable, an estimated timeline for repair or alternative transportation options. I am attaching copies of my repair estimate, service records, and proof of purchase. Please advise me of the next steps and whether further documentation is needed. Thank you for your attention to this matter. I look forward to a prompt resolution so that I may safely return my silverado to the road. Sincerely, [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I am writing to bring to your attention an issue I've been experiencing with my truck's transmission. Recently, the transmission failed due to a torque converter issue, which has caused significant disruption for me. From my understanding, this is a known problem that hasn’t been adequately addressed by gm. As I'm currently in the process of getting the transmission rebuilt, I believe it is only fair that I should not have to bear the costs associated with this repair. I would appreciate it if someone from gm could reach out to discuss this matter further. Thank you for your attention, and I look forward to your prompt response.

Rear wheel lockup due to transmission valve body issues.

Just hit 65k miles and have had a transmission issue where it shutters back and forth and was quoted 6k to repair it.

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving 70 mph, the transmission independently shifted to 4-wd. No warning lights were illuminated. The contact stated that the vehicle decelerated to 55 mph, and the rear wheels locked up. The contact stated that the failure reoccurred, the rear wheels locked up, and the vehicle went sideways. The vehicle was almost involved in a crash. The contact’s wife, small children, and grandchildren were occupants of the vehicle during the failure. The vehicle was driven to the residence. The contact stated that the vehicle failed to exceed 50 mph while driving. The contact's wife was afraid to drive the vehicle. The onstar system retrieved dtc: p0708 (transmission range sensor circuit high input). Additionally, in November 2024, an unknown recall repair was performed to update the power train software. The dealer was made aware of the failure. The vehicle was scheduled to be diagnosed at a later date. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 58,000.

Tranmission rebuild at 70000 miles.

Having transmission issues like other silvardos but not included in recall.

Having transmission problems but include in recalls like other silverados.

Rear wheels of vehicle locked up momentarily mutliple times while driving between 45 and 65 miles per hour. Originally happened multiple times while towing a travel trailer but subsequently happened again with no trailer being towed. No warning lights or other sign of a problem leading up to any of the malfunctions. After locking up for approximately a quarter to half a second, the wheels release and the truck drives normally. Sudden wheel lock up could lead to loss of control or cause a vehicle to collide with the back of affected vehicle. Issue was reproduced by dealer service department and they recommended a new transmission valve body. This seems to be related to the recall for the transmissions on the diesel models of this truck but the gas trucks were excluded from that recall.

I was driving and came to a stop at a red light. When accelerating on green the transmission would not go into gear, stalling my vehicle. Nearly causing the vehicle behind me to rear end me. The vehicle eventually went into gear and started to slowly accelerate with shuttering of the transmission.

Initially, turbo charger issues. Dealer after 2 weeks corrected issues with the turbo charger. We were provided loaner. Dealer took 28 days, the second time, to supposedly remedy transmission/shifting issues. First we were told it was a valve port body. Then we were told they had to remove the pan, etc. , all part of the process. Then the parts were on backorder. Finally, at the 11th hour, they installed a rebuilt transmission. Without a loaner for 2 weeks. Got the truck back and within 24 hours, the truck suddenly lost power steering while driving around curve at aprox. 30 to 35 mph. , check engine light on, power steering light on, trailer brakes warning light on, etc. Had it towed back to dealer in the morning and told it would be a priority. Called at 5pm. Truck has not been seen. It's not a car. It's a work truck. Seems the dealership is swamped with silverado trucks with similar transmission issues waiting for valve ports. No loaner vehicles to be had the second time after 2 weeks. Not sure what they will tell us tomorrow.

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving approximately 40 mph, the contact stopped for a traffic signal, and the accelerator pedal was depressed when the light changed; however, the vehicle failed to respond. The contact stated that the engine was still running; however, the vehicle failed to respond while the accelerator pedal was depressed or the gear shift lever was moved. The contact stated that the check engine warning light was illuminated. The vehicle was towed to a local dealer, where it was diagnosed, and determined that the transmission control module needed to be re-flashed. The vehicle was repaired; however, the failure reoccurred. The contact had taken the vehicle back to the same dealer two more times for the same failure, however the vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 41,000.

I am writing to formally lodge a complaint regarding my chevy vehicle, which is experiencing significant engine issues. The motor is knocking, and the check engine light has illuminated with trouble codes p0011 and p0016. These codes indicate problems with the camshaft and crankshaft timing on bank 1 (driver's side in a v6/v8 engine). Specifically, p0011 signifies that the camshaft timing is over-advanced, while p0016 points to a correlation issue between the camshaft and crankshaft positions. These issues are often related to the variable valve timing (vvt) system and may be caused by faulty camshaft or crankshaft sensors, timing chain problems, or solenoid issues. This situation directly correlates with a recent recall affecting similar VIN numbers for 2021-2024 models with similar engines. An independent service has confirmed that my truck requires a new engine, which aligns with the issues addressed in the aforementioned recall. I urge the NHTSA to investigate this matter further and consider extending the recall to include my vehicle, as the problems I am experiencing are consistent with those covered by the recall.

The rear brakes of the vehicle are locking up while driving. The truck is a 2020 Chevrolet Silverado 1500 crew cab and 2020-2022 Chevrolet Silverado 1500 are listed as included in the recall per the NHTSA campaign # 24v797000 recall. When searching the VIN number of our vehicle, [xxx] , it states that it is not included in the recall and has no unrepaired recalls. Our vehicle is experiencing the issue as outlined in the recall notice but is not currently included in the recall when it should be. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I had the lifters and camshaft fail in my truck as a result of the faulty fuel management system gm put in these trucks during these years of manufacturing. I was driving my kids to an appointment when they failed in the middle of the highway, leaving the truck unable to run. I have reported the problem to the dealer as well as reported to gm directly. I have spoken with 3 different garages, all of which have made it a point to tell me this is a common issue in these trucks. Prior to this happening, there were no lights on to warn me of this problem. The repair cost is $12,000 and that is to put the same parts in the failed the first time. I don’t know many consumers that can afford the costs of these repairs when gm knows this is an issue but refuses to do anything about it.

When a check engine light is on it's for a low voltage on the charge air coolant sensor, took to the chevy dealer, they replaced a connector to the sensor, at a cost of $600 never got off lot, light returned, they then said I need a new engine wiring harness at a cost of $10. 000, the dealership said this is a problem with these trucks and gm knows about it but won't recall them. Now I'm struck with a 5-year-old truck that I can't use, when this light is on, I also receive an emission system warning, and the truck deregulates and goes in limp mode. As speed is reduced it becomes dangerous to drive in traffic, as gm knows about this, they should recall these trucks and fix the problem, they even say it's because cutting corners on the wiring harness cover causes this problem. As a senior living on a fixed income there's no way my wife or I can get this repaired, so were forced to drive it in limp mode until it dies on us, hopefully not in heavy traffic.

A few month ago this 2020 silverado check engine came on in the middle of driving. It stopped shifting and almost caused an accident because it wouldn’t stop. I took it to the dealer and they found nothing wrong. Today, it is doing the same thing with faulty shifting, especially during first and second gears and when I initially accelerate. It is jumpy and worried and accident will happen if the car stops shifting like before. The check engine light is on again.

I had the same transmission torque converter failure shuddering jerking as the class action lawsuit as the 2015-2019 8spd that are covered but 2020 is not. . It is a known issue. I had a transmission repair shop replace torque converter and service transmission to repair transmission issue. I did not have any warning or check engine light.

Transmission shudders started around 65k miles. Shop said it was recommended to do a transmission flush. We did that. Now at 72000 miles the transmission is locking up. It has been inspected by a reputable auto shop and they stated it needs a new transmission. The engine light came on when this issue happened. I was in the middle of traffic at a stop and when I started going it stopped abruptly and threw me forward. It was so violent that I thought I was rear ended. It did it two more times.

My transmission keeps shuddering my whole vehicle after the new software was installed gm claims it’s fine and normal when in fact it’s going to cause an accident.

2020 Chevrolet silverado with 72k miles has a bad transmission torque converter. Warranty expired 2 months ago and will have to be replaced in the next 30 days. Had the truck checked out at a local transmission shop that said this is happening on every v6 silverado that is being brought in.

Transmission is changing out very hard in each gear. On tonight while I was driving, I lost speed on the interstate and when I push the accelerator, it was like back wheels were locked up. I left it at the next exit gas station and came back and towed it home. Lucky I was able to put hazard lights on and get off the side of the road but it was very slow speed. Yes I have had it look at certified dealer under cheverolet. It was no warning light. I was going 65 and in a split second the rpm went up high and I was doing like 25. Once I finally made it to the gas station and got out the truck smell like a burning smell.

The transmission has been slipping and shuttering which shouldn’t be an issue at 119,000 miles. This opposed a huge safety risk for me and my girlfriend on the highway. I was driving and it shuttered so bad I had thought the wheel was loose and coming off. I had to pull over on the highway to check the lugs and came to find out it’s the transmission, because it shuttered numerous times after. On top of that the entire trip was the transmission shuddering slightly making the wheels cut the the left and right. But throughout the trip, it had a slight shutter the entire time and a couple of big shutters, and one very large shutter that had my girlfriend think I ran over a bunch of wood in the road resulting in me pulling over being in danger and possibly wrecking from the shaking, and having to exit my truck on the side of the highway with 18 wheelers and other vehicles flying at 80+ miles an hour. Besides the safety issue, there should be no reason for these transmission going out like this at 60k miles and 100k miles it’s extremely cheap of gm and a huge hazard to many families.

The oil coolant cooler is leaking oil into my antifreeze reservoir, but nothing is in the oil pan, which could cause damage to the engine a very expensive fix, and this should be covered under drivetrain by all means.

The transmission skips and has trouble finding gears. This causes the truck to vibrate, be slow to accelerate, or lurch occasionally. The decrease in vehicle responsiveness and unpredictable behavior make the vehicle drivable, but less safe.

Chevy silverado shakes at 20, 40,65 and 70 mph chevy shake.

My truck rpm goes idle while driving also a loud knocking sound when accelerating.

Employee was driving company car on backroad, started to rev high im assuming from trying to accelerate. Car started to slow and was pulled into a parking lot and towed to dealer. Upon inspection it was shown transmission cooler lines broke at crimps and quoted 2k to fix just the lines.

Rear tires repeatedly locked up at highway speeds. Causing engine damage.

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the vehicle jerked and jolted temporarily. The contact stated that the failure had been recurring while driving. No warning lights were illuminated. After investigating the failure, the contact related the failure to NHTSA campaign number: 24v797000 (power train); but the VIN was not included. The vehicle was not diagnosed or repaired by the dealer or an independent mechanic. The manufacturer was not notified of the failure. The failure mileage was 105,000.

6. 2l engine noise at start up and stays on and loses engine power sluggish all of a sudden while driving same issue like the current recall on all 6. 2l except mine was built right before approved recall dates but has same engine l87 with same issue and is currently undriveable and dangerous if taken on road. Regular oil changes at 50% oil life with recommended mobil1 oil & acdelco oil filter.

Transmission stalls out when going from 1st to 2nd and when driving down the road in cruse control it shutters.