2020 Chevrolet Silverado 1500: complete transmission failure

Filed Oct 6, 2026 · Transmission · CA

My transmission was shuttering from about 10,000 miles to 67,000. I reported it multiple times to the dealership and they did nothing about it until the 67,000 mark when they finally replaced it. the new transmission started to downshift very hard as soon as I got it back from the dealer and it just got worse I took it back and they had diagnosed that it was bad. They are in the process of replacing the transmission, a second time which would be my third transmission They’ve had my truck for 36 days. Clearly, General Motors and the dealership cannot figure out how to get my transmission to work properly. It’s a danger to my family and those on the road if it fails while on the highway.

Filed Oct 5, 2026 · Electrical, Engine · 73,000 miles · FL

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving, the vehicle was shuddering. The vehicle was taken to the dealer and was diagnosed with transmission failure. The contact was informed that the torque converter and transmission needed to be flushed. While driving approximately 30 MPH, the vehicle was shuddering and the transmission seized, with the check engine warning light illuminated. The failure had occurred briefly, and the failure was self-corrected, and the contact continued driving. The failure reoccurred approximately 2 - 3 times. The vehicle was returned to the dealer, and the transmission was replaced. The failure persisted, and the vehicle was returned to the dealer, and the transmission was replaced a second time. The vehicle was returned to the dealer, who was unable to diagnose or repair the vehicle. The contact drove the vehicle an additional 20,000 miles before the vehicle received additional repairs. The manufacturer was informed of the issue several times. The failure mileage was approximately 73,000.

Filed Oct 5, 2026 · Transmission · GA

Transmission failure around 63000miles. Jasper rebuilt transmission having issues at 130000

Filed Aug 28, 2026 · Transmission · PA

Purchased used in 02/2022. Pickup started to shutter when shifting at 35-45 MPH. Took it to Turnpike Chevy who found thrust bearing in reaction carrier broken and damaged planetary gear set. They replaced the reaction carrier ASM and Reconditioned the transmission ASM. Replaced the valve body ASM. Took to John Sauder Chevy numerous times between July 19 2024 and July 7 2025 due to the shutter when shifting having returned. They tried the GM approved fix of flashing the computer to reprogram and kept saying they could not duplicate. On June 18, 2025 while towing a trailer on the highway while going highway speeds in the middle of rush hour traffic the transmission suddenly started making a shrill noise. Transmission disengaged and lost power. John Sauder Chevrolet found a broken oil pump drive and drive gears on the 10L80E transmission. GMC refused to replace the transmission and now it is out of warranty and starting shutter again when it shifts

Filed Aug 12, 2026 · Engine, Transmission · 76,000 miles · GA

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle was running rough and the vehicle lost automotive power. The check engine warning light was illuminated. Additionally, the transmission made an abnormal sound while starting the vehicle and while driving, and the torque converter was shuddering. The contact and his father diagnosed the vehicle as having a cylinder misfire and performed a compression test on the engine. The contact replaced the lifter and push rods, deactivated and removed the Dynamic Fuel Management (DFM), modified the engine, replaced transmission fluid, and used Lube Gard Instant Shudder Fixx for the torque converter shudder. The manufacturer was made aware of the failure. The failure mileage was approximately 76,000.

Filed Jun 12, 2026 · Engine, Transmission · MO

I'm experiencing all the documented issues with the 10L80 10 speed transmission. Identical to all the recalls. It's shifting poorly, torque converter shudder, lose of power, unreliability, and serious safety concerns. I've tried to communicate and find a resolution to these issues through the dealership and GM. Of course getting nowhere. I don't feel a 60k dollar truck should be in this kind of condition. Recently the ac compressor went out. Conveniently after the 6.2 was considered faulty and was replaced but transmission denied. Which the dealership GM expressed in no way was any factors the warranty companies claims of a taller tire being on the truck. Being the issue at all for the transmission failure. Also the dealership didn't check a box. One that I can not physically check. Which they put on me. They swapped the stock tires to the taller brand new set I'd just bought for my trade in. Never stating anything about the tires being taller voiding the warranty I just paid for. Why would I deny the part of the extended warranty that I wanted. Cause of the suspension and drivetrain. Either way this truck is not safe to be on the road. It struggles to maintain speed on the highway. Eventually leading to the torque converter free spinning and making all kinds of noises and vibration. Of course once I've assisted it to violently shift through the gears and hopefully into 10th. On occasions it never makes it that far. Either way I feel this falls directly into the recalls with the same model and year. They replaced the 6.2 cause of cylinder failure and oil consumption. Well the next in line for the drive train is the junk 10 speed. Not sure how it can't be related. The long and stressful time. I've put into finding a solution with the dealer or manufacturer. They blow me off or just don't give me any info. I feel that's their way of dismissing not only the failure of the salesman not properly doing his job. Which the GManager also stated mistakes happen. Not OK

Filed Jun 5, 2026 · Transmission · TX

Transmission failed before 100,000 miles. All service was complete throughout the life of the vehicle. Problems shifting to next gear causing pulling or slipping on the vehicle. If not able to accelerate properly could cause a safety concern on the road. Repairs were made costing $9,000.

Filed Apr 27, 2026 · Engine, Transmission · 70,000 miles · GA

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving 35 MPH, the vehicle shuddered and lost automotive power. The check engine, ABS, and several other unknown warning lights were displayed before an engine misfire. The vehicle regained automotive power before hesitated while depressing the accelerator pedal. Additionally, there was an abnormal humming sound coming from the engine. The vehicle was eventually driven to the dealer where a diagnostic test was performed. The dealer determined there was a lifter failure in cylinder #2, and there was debris in both the engine and transmission, which caused engine and transmission failures. The dealer agreed to a goodwill repair, to cover part of the cost of the repair. The manufacturer was notified of the failure and transferred the contact to the federal safety agency to report the failure. The vehicle was not repaired and remained with the dealer. The failure mileage was approximately 70,000.

Filed Mar 9, 2026 · Transmission · 78,442 miles · GA

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. In addition, the vehicle shuddered and jerked erratically. No warning lights were illuminated. The vehicle was taken back to the Toyota dealer where it was purchased, where it was diagnosed with a failed torque converter. The contact was informed that the torque converter needed to be replaced. The vehicle was not repaired. The vehicle was then taken to the dealer, where it was diagnosed with a failed torque converter. The contact was informed that the torque converter needed to be replaced. The vehicle was not repaired. The vehicle was taken to an independent mechanic, where it was diagnosed with transmission failure. The contact was informed that the torque converter needed to be replaced. The vehicle was not repaired. The contact referenced an unknown recall with a similar failure; however, the VIN was not associated with the unknown recall. The manufacturer was not made aware of the failure. The failure mileage was approximately 78,442.

Filed Feb 3, 2026 · Electrical, Engine · CA

To Whom It May Concern, I am writing to formally file a complaint regarding my 2020 Chevrolet Silverado 1500 Diesel and to request immediate review and assistance from General Motors. I purchased this vehicle from a GM dealership in 2024 with approximately 70,000 miles for roughly $42,000. The vehicle currently has approximately 121,000 miles. Since purchasing the vehicle, it has suffered major breakdowns approximately every three months, requiring repeated costly repairs and making the vehicle unreliable for regular use. Most notably, the vehicle experienced a full transmission failure at approximately 103,000 miles — just after the factory warranty expired, requiring complete transmission replacement at my expense. To date, I have spent nearly $20,000 in repairs, including but not limited to: •Full transmission replacement •Two alternator replacements •Glow plug system failure •Coolant control valve failure •Engine control / computer module failure •Transmission cooling system failures •Ongoing electrical system issues •Additional drivetrain and mechanical problems These are critical powertrain, electrical, and engine management components — not routine maintenance items. The repeated failure of such systems strongly suggests underlying manufacturing or design defects. The vehicle has been properly maintained and serviced, yet continues to experience serious and recurring defects well beyond what would be considered normal wear and tear for a modern diesel truck. At this point, my total investment in this vehicle exceeds $62,000, and I am left with a truck that I cannot trust and that has become financially unsustainable to own.

Filed Dec 3, 2025 · Transmission · NY

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)

Filed Nov 11, 2025 · Transmission · OK

The transmission quite working while I was driving down the road. Took my foot off of the gas pedal and my truck bogged down completely and had no power to it. It is at an auto repair shop so I am unaware if it could be inspected under request. Took time but was able to safely get off the roadway and out of traffic. It did the out of no where. Started having some issues this summer but no warnings lights ever came on, so I didn’t think much about it. Completely stopped in the middle of the road and had little to no power from the transmission to the truck to move off of the road. My truck is currently in an auto repair shop waiting on a new transmission to be installed. I had it towed to an independent auto shop from where it stalled. There were not warning lamps or anything at the time of my transmission quitting. Truck started to run rough and shifting hard this summer but without warning lamps I didn’t take it anywhere. When running on the interstate it was shuttering which I thought was due to possible tire out of balance. It would also hesitate to take off when put into drive. It had several of the same issues that Chevy had on other transmissions that were recalled within this same time frame.