The contact owns a 2019 Chevrolet Silverado 1500. The contact stated while driving 45 MPH, the vehicle was vibrating abnormally and shifted out of gear independently. The vehicle was towed to the local dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was then taken to an independent mechanic where it was diagnosed and determined that the torque converter was failing and needed to be replaced. The top of the engine was replaced, and the vehicle was repaired. The manufacturer was notified of the failure but offered no assistance. The approximate failure mileage was 112,500.

- Enid, OK, USA

8L90 Transmission failed. The transmission was inspected by a chevrolet Technician at a Chevrolet dealership and found to be defective, thus rendering the vehicle not drivable. There was an engine light that indicated a TCM problem. The vehicle is currently in the mechanic shop at the Chevrolet Dealership awaiting a new transmission.

- Saint Francisville, LA, USA

transmission shudder and shakes at high speed and low speeds

- Saint Thomas, PA, USA

When I bought the truck it only had 82 miles on it. After owning it for about a month it was shifting very hard at times. So hard it felt like I was being hit from behind. I complained to the dealership and they told me "that's normal for those". I learned how to drive it to avoid the problem. At 52000 miles I had the dealership do the routine transmission service that is due @ 45,000. The truck was fine when I took it in. When I got it back it was shifting extremely hard and erratically. It would downshift and accelerate by itself. On wet roads it would fishtail and I would almost lose control. It did this in traffic and I almost slid into oncoming traffic. While pulling away from a stop sign, the transmission slipped so bad the engine revved to 5000 rpm before catching. Then the check engine light came on. I took the truck to the dealership the next morning and they checked it out. They said it needs a new transmission. They also said it was my fault for going past the recommended service interval by 14%. Now they say a new transmission is going to cost $12,582.78. GM has agreed to pay half of that but they have known about these transmissions for years and they kept selling them anyway. My truck was not showing any unusual signs that the transmission was failing until I got it back from the dealership after they serviced it.

- Bremerton, WA, USA

The contact owns a 2019 Chevrolet Silverado 1500. The contact stated that while operating the vehicle, the transmission malfunctioned, causing the vehicle to shudder and vibrate abnormally while changing gear. Additionally, after shifting to the drive(D), the vehicle occasionally lunged forward. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure, but no assistance was offered. The failure mileage was 30,000.

- Clay Township, MI, USA

The rear brakes lock up when slowing down. mechanic said its the transmission and that he had seen alot of this in this make and model of truck. The only fix is to clean but that is a temporary fix. The transmission we have is not made anymore. There is a recall in the 2020 model of my truck but doesnt include my 2019 even though it is the 2020 model.

- Willow Springs, Missouri 65793, MO, USA

Driving down road transmission felt like it locked the wheels and stopped the vehicle briefly. Vehicle went into limp mode. Almost got rear ended. Going 55 mph to immediate stop. Have been having transmission shifting hard with truck since purchase. When accelerating @low speeds and it vibrates. Every time it has been brought up to service department they say it was normal. Brought vehicle in 3 months prior to this incident for harsh shifting and vibration and dealership stated it was due to deteriorating fluid. They serviced transmission and filter. Once incident happened again took vehicle to dealership they ended up keeping vehicle for 58 days waiting on parts to replace the valve body and speed sensors.

- Valdosta, GA, USA

There is an issue with the transmission. My vehicle had started shifting erratically and became very clunky. At highway speeds, my truck will shutter and shift up and down for no reason while remaining at a constant speed. I took it to a certified mechanic and I was told it is a matter of time before my transmission completely fails. I have an invoice confirming these claims. This is a very wide spread issue with these 8-speed transmissions. I was told by the mechanic that the 2020-2024 models of the EXACT SAME TRUCK are now receiving recalls on the exact same transmission yet the 2019s are being overlooked.

- Bellevue, NE, USA

Transmission shift hard.

- Irmo, SC, USA

-The transmission on this vehicle has begun to shift erratically with an audible thumping or clunks at normal speed. At highway speeds the vehicle will shudder and shake as the transmission shifts through the gears and periodically upon reaching cruising speeds. - Failure of the transmission is not out of the question. It could possibly lock up at any time while driving. - A reputable transmission service center reproduced and confirmed the complaint issues. - There have been no warning lights or messages pertaining to the issue. A vehicle diagnostic report confirmed no codes.

- Murfreesboro, TN, USA

Transmission problems in 8l90. Needs valve body. Torque convert and few others. Lost communication with power steering control module. Most control to body co trol module. Rear right and left speed sensor correlation.

- Columbus, OH, USA

transmission jerks and bucks when shifting and when driving on high way it shakes so bad it messes with the steering wheel.

- Middle River, MN, USA

The engine oil cooler line detached from the crimp joints, causing an "oil pressure low turn vehicle off" alert. I was fortunately able to pull over immediately, and catch the 8 quarts of oil which dumped out. This resulted in $634 repair bill, and likely damage to the engine of the truck. Had I not been in a rural area and able to pull over immediately, I would have lost all power to drive and dumped that oil on the road, causing both safety hazard and environmental damage. This truck has been serviced by our local Chevy dealer who confirmed the problem with GM. This is a known problem to GM, the subject of their Customer Satisfaction program bulletin N192220080, and a recall in Canada and Alaska. Clearly the issue exists in areas other than Canada and Alaska, yet GM refused to cover any of the cost under our 60,000 mile warranty and has not issued a recall in other states.

- Troy, PA, USA

The torque converter started vibrating and the transmission starting hard shifting its in shop now needing new Torque converter and transmission

- Webbville, KY, USA

Transmission hard shift and downshift also has a torque convertor shudder it also has high transmission temp the coolant temp on the dash is above the middle point have been to the dealership multiple times they state everything is normal transmission problem can cause a safety issue on the road if truck doesn-??t shift how it-??s supposed to.

- Rialto, CA, USA

8L90 Transmission failure at 60k Miles.

- Orlando, FL, USA

1.What component or system failed or malfunctioned, and is it available for inspection upon request" The transmission system appears to have malfunctioned, specifically causing hard, sudden jerks when shifting and sluggish acceleration. While the issue is ongoing, the dealer has not confirmed any problem. The dealer has performed transmission flushes twice under 60k miles and recommended a third flush a few months back when I took it in for the jerking issues. The transmission is available for inspection upon request. 2.How was your safety or the safety of others put at risk? The hard, sudden jerks when shifting can feel as if the vehicle has been rear-ended, potentially causing a loss of control or distraction while driving, posing a risk to both the driver and others on the road. Sluggish acceleration could also impair the vehicle-??s response in critical driving situations, such as merging or avoiding obstacles. 3.Has the problem been reproduced or confirmed by a dealer or independent service center? No, the problem has not been reproduced or confirmed by the dealer. The dealer claims the behavior is considered -??normal operation, -?? despite the symptoms being severe enough to concern the owner. 4.Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle has only been inspected by the dealer, who did not find any issues with the transmission or other components. It has not been inspected by any other parties like the manufacturer, police, or insurance representatives. 5.Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear" There were no specific warning lamps or messages associated with the issue. The symptoms of hard jerks when shifting and sluggish acceleration appeared over time but have not been linked to any warning signals from the vehicle-??s systems.

- Baton Rouge, LA, USA

The contact owns a 2019 Chevrolet Silverado 1500. The contact stated that upon shifting into drive, the vehicle unexpectedly lurched forward. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 131,000.

- Union, KY, USA

The contact owns a 2019 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle briefly shuddered and lunged forward. The vehicle returned to normal functionality, but the failure became a regular failure. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the torque converter. The contact was also informed that the dealer observed metallic flakes inside the transmission fluid. The vehicle was repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 44,000.

- Clifton Springs, NY, USA

Transmission shudders when starting off and slams into gear when down shifting. Took truck to dealer while still under warranty and was told that GM states this is "normal operation" and refused to perform repair under warranty. Now that truck is out of warranty period, GM is saying that transmission needs work at a cost of $6000 for torque converter and valve body assembly GM is well aware of the issues they are having with their Transmissions and refuses to fix or update..

- Fort Worth, TX, USA