See attached document for complaint

- Black Jack, MO, USA

I own a 2019 Chevrolet Silverado 1500 LT Trail Boss that exhibits strange and persistent issues. A recurring engine code appears P0499, clears itself, and then reappears without consistent resolution. This affects the remote starter as the engine light will be engaged. Additionally, several service warnings flash momentarily and disappear, including: -??Service Trailer Brake System -??Brake System Failure -?" Top Speed Limited to 62 or 43 MPH -??Parking Sensor Unavailable These warnings occur without warning and vanish too quickly to document fully. Despite multiple visits to the dealership, technicians have been unable to replicate or resolve the problem. This unpredictable behavior creates safety concerns, particularly regarding brake system reliability and sensor functionality. I and many others experiencing these same issues are concerned about a potential electrical or sensor issue impacting vehicle performance and safety.

- Baton Rouge, LA, USA

86,000 miles on the vehicle and transmission and oil leakingproblem

- Sandy Springs, GA, USA

Transmission shifts really hard and down shift hard. Have been the to dearships 3 times being told that-??s just how the transmission is even them acknowledging. It-??s a problem.

- Newcarlisle , IN, USA

My truck is at Hubler Cevrolet in Greenwood, IN with engine oil cooler lines leaking at 40,000 miles. GM Customer satisfaction program for some vin numbers expired in 2023 (N212326940). My vin was identified as being ineligible. Upon my own further research these trucks are known to have issues with leaking or rupturing oil cooler lines leading to catastrophic engine failure. I suspect that the manufacturer of the previously covered lines is the same although the part application number may be different. The manufacturer produced a defective oil cooler line that is previously know to fail especially in cold climates. I am Indianapolis, IN where temperatures have been below 0 at times and is frequently below freezing during winter. My lines starting leaking after the first freeze, about 4 weeks ago. I closely monitored the oil level until I was able to take it to the dealer for further inspection, it always remained above half on the dipstick. I wrongly assumed that the leak was from an overtightened oil drain screw from the previous oil change. I had my oil changed at XpressPro a few days before I took my truck to the dealer because their technician identified the leak was from the oil cooler lines. The tech at Xpresspro showed me a video he took on his personal cell phone showing the oil covering the engine oil cooler lines. The dealer is quoting 1400 for the repairs and they are not covered by powertrain warranty even though the engine would seize if they ruptured while driving. I reached out to GM customer service and spoke with Kaylee she advised me to contact Hubler to inquire about cost assistance and use my case number she gave for reference (XXX). I beleive this should be covered by a recall as it could have ruptured while driving causing the engine to lock and stop all forward momentum. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6

- Indianapolis, IN, USA

They sold me a vehicle at the dealer. Three days after I bought it, I had to buy tires for it. Because they were in bad condition, they also charged me for a liquid called 3m nitro and I don't understand why they put it in if the tires were in bad condition, and they also promised to fix some details on the bumper and details on the paint on the body of the truck, and the transmission has already started to fail, and they don't want to help me or take responsibility. The truck still has a Dealer warranty.

- Kansas City, KS, USA

The contact owns a 2019 Chevrolet Silverado 1500. The contact stated that upon reversing out of the driveway and shifting into drive(D), the vehicle jerked several times, then the vehicle responded as needed. There was no warning light illuminated. The contact stated that the failure mostly occurred when the engine was cold. The vehicle was taken to the dealer, where an unknown software update was performed; however, the failure persisted. The vehicle was taken back to the dealer, where the contact was informed that the manufacturer had advised that the vehicle was operating as designed. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not under recall. The failure mileage was approximately 52,000.

- Swartz Creek, MI, USA

The contact owns a 2019 Chevrolet Silverado 1500. The contact stated while driving 45 MPH, the vehicle started vibrating and hesitating. The vehicle was taken to the dealer to be diagnosed. The contact was informed that the transmission fluid needed to be flushed and refilled. The torque converter was replaced, and the vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 64,000.

- Uniontown, OH, USA

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