2018 Chevrolet Silverado Powertrain & Transmission Problems

I was driving on highway 20 in Cartersville ga at speeds around 55-60 mph with both of my kids the vehicle. All of a sudden my rpm’s shot up to over 5000 while losing acceleration control of the vehicle. I attempted to slow down and pull over on the side of the road to get out of traffic and was unable to get the vehicle to move forward or backwards at all. The rpm’s continued to rev out of control unless I was park. I had to shut the vehicle off for a few minutes, erase codes and attempt to move it again. I got it to move another few feet to just clear the roadway. I had to leave the vehicle on the side of the road and get both my kids out on the highway and wait for someone to come pick us up. The truck is now in the shop and I’m told that the torque converter shred to pieces and the my transmission was shot. This was a $7000 fix and the vehicle hasn’t even hit 100,000 miles yet. I also did the recommended service at 80,000 miles following the Chevy guidelines for my truck.

We purchased a 2018 Fully Loaded Chevy Silverado LTZ/Z71 (60,000) in 2019, with the idea it would last. After being super meticulous with maintenance and keeping this vehicle in top condition, we just passed the 110,000 mile mark. I have receipts of all the work/maintenance completed on this vehicle. I began to hear a ticking noise in the engine block, and the check engine light came on, so I pulled the codes and went to a local transmission/engine mechanic to find that I have a bent push rod (manufacture failure) due a failed lifter/AFM system. I opted not to take it directly to the dealer as they charge 179 base rate for diagnosis which could increase depending on the diagnosis needed. After numerous calls, I found this is a very common (7,500-11,000) issue with '18-'21 models. Explored my options only to find the 2021- 2026 engines are worse with issues involving crankshaft, engine seizures and an active lawsuit with the new 6.2L V8 engines. (Silverado, GMC Sierra, Tahoe, Suburban, Yukons) I was then pointed in the direction of speaking to the GM Manufacture directly, again. I had contacted them numerous times and was told the damages, even though are not preventable and are directly due to a manufacture error. I was told I must take my vehicle to a licensed service dealer to be diagnosed. I informed them, that I was already told my vehicle would not be covered so I did not feel the need to endure additional cost only to be told the cost would again, not be covered. I'm not seeking full payment; I even mentioned Goodwill assistance of which they denied; however, I'm without a vehicle and have received very little to no communication in resolving this issue, which is an issue I'm finding is happening to many others alike and General Motors Corp, is not taking any responsibility or accountability in this matter.

Transmission skips 1st gear and jumps and shakes vibrates. The transmission has to have a total rebuild

While pulling a 14' enclosed trailer when i left off the gas pedal there was a sudden low growl/vibration coming from the bed area of the truck. I was slowing down for a red light and it started at around 20mph. I pulled off slowly when the light turned green and was listening with my head out the window but everything seemed normal, about 2 miles down the road from the initial vibration/growl incident and running about 40mph the rear differential completely locked up causing the drive shaft to snap off the pinion yoke and left me sideways in the middle of both lanes with an enclosed trailer and alot of ticked off people cussing at me like i did it on purpose or something. Because the rear end was completely locked up, there was no way for me to move out of the road way so i had to sit blocking both lanes for 2 hours while waiting for a tow truck. There was no warning lights, the only kind of warning was the quick and subtle vibration/growling noise at the redlight.

-Transmission failed. - Driving down the highway and the truck just quit. (Morning rush hour traffic) -truck was towed to my mechanic -only made a weird noise the day before.

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle shuddered abnormally. No warning light was illuminated. The vehicle was taken to the dealer, and it was determined that the transmission was failing to shift into gear properly. The contact was unaware of which part needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 114,690.

My transmission failed at around 69,000 miles. This was confirmed by the dealership. I bought my vehicle from and was covered under warranty. I purchased my vehicle in 2019 from a Dodge dealership and it came with a 10 year hundred thousand mile warranty for the powertrain. The tech indicated that the torque converter failed sending metal fragments through the transmission, coolant lines and transmission cooler. There were no warning indicators only hard shifting clunking when shifting and shuttering at different speeds.

Torque converter failed which led to premature transmission failure at 115,000. Known common issue with 6L80 and TSB advising this. No recall

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, the vehicle hesitated or shuddered while depressing the accelerator pedal. There was no warning light illuminated. The vehicle was taken to an independent mechanic and was diagnosed with transmission failure. Due to the failure, the torque converter and the transmission were replaced. The vehicle was repaired. The manufacturer was notified of the failure, and the contact was informed that there were no recalls for the failure under the VIN. The failure mileage was 85,377.

shudder while driving

2018 Chevy Silverado with 84,000 miles and the transmission is broken. Truck is currently in a shop to have a new transmission installed.

I purchased my truck in December 2018 which is a 2018 Chevrolet Silverado 1500 4x4 crew cab automatic from Servco Chevrolet Dealership in Waipahu, Hawaii and making monthly payments for my truck February of 2019 truck runs good and purchased the warranty also had my oil and service changed when time is due which I always kept up. [XXX] and mileage was 40k while leaving work to go home at a stop light was red once turned green I pushed pedal to go and truck just changed noise tone started to run like rough idle, loud tapping noise coming from the engine, shaking and check engine light came on almost causing me to get into an accident. I pulled on the side and checked what was going on and heard the tapping noise from the motor. So I made an appointment with service department with Servco Chevrolet Dealership where i bought my truck from and spoke with the service tech for my truck to go in for repairs due to issue. It took 2 to 3 weeks for repairs to be complete and service tech informed me that I'm not the only person to have that issue which had to do with the lifters and camshaft with these motors but GM never came out with any recalls due to how much people has the same motors with the same issue. So luckily it was still covered under warranty but said the problem might come back and would just replace the faulty lifters and camshaft. So in August of 2023 my truck has the same issue but wasn't covered under warranty anymore and mileage is 61k and missed the warranty repairs that was for the lifters which I got it scanned cause check engine light and same issue and code was P0016. So I called Servco Chevrolet dealership in waipahu again and spoke with the service technician which he told me I just missed the coverage of the warranty repair and only way to get it fixed I would have to bring it back for them to scan and roughly would range from 4k to 8k to get it fixed. So my truck is parked in my garage and hasn't been moved but paying for truck. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The transmission has been shifting hard. I have had it serviced to try and address the issue. It continued to shift hard, until suddenly slamming me down and locking me into first gear. It would not shift from first gear until I found a parking lot, placed it in park, shut the truck off and restarted it. This caused me to nearly rear end the vehicle in front of me. This has not been reproduced to date because the shop cannot get to my truck for 4 weeks and I cannot be without a vehicle for that long (won’t schedule and let me bring in the day before). There has not been an inspection done by anyone because I was able to avoid the collision, and the shop is too far out time wise. There were no prior indications/lights to warn me of a severe problem. The dealership informed me that this has been an ongoing problem with the valve body inside the transmission, but there is no warranty or recall for it. They were sure happy to take my money without telling me of the problems when I bought my truck.

Vehicle went into limp mode on I 65 in Indiana. Chevy dealer replaced tvb/ thermal bypass valve with newer version that opens at a lower temperature.Hard to get vehicle to the side of the highway. State Police arranged a tow truck to remove vehicle from highway.

Driving on the fwy going 73mph While running Transmission stopped working and I’m not able to accelerate to move forward and safely pull over to the shoulder. The problem was not been confirmed by the dealer or service center. The vehicle was not been inspected by anyone. There is no warning lamps Messages, or symptoms of the problem prior to the failure.

The contact's husband owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, the vehicle hesitated while depressing the accelerator pedal. The vehicle was taken to an independent mechanic where the contact was informed that metal shaving were discovered in the radiator due to a defective torque converter. The manufacturer was then notified of the failure and the contact was informed that there were no recalls on the VIN. The contact was referred to the NHTSA Hotline to report the failure. The vehicle was not repaired. The failure mileage was 143,057.

While driving on an Interstate the vehicle violently shook and drive shaft ce off.

My 2018 Silverado z71crew cab LT , 5.3L engine was having issues with hold Freon in AC unit. We took to dealer to be fixed in June 2025. They added Freon and it was running good for a week then once again blew but no cold air. So took back second time 7/3/25 and they started the die test and machine went down in middle of doing it. So could not finish fixing . We took back on 07/20/25 and they completed the test needed condenser . So few days later we took to our local mechanic to have the condenser replaced and all is well with the AC unit now. Everything was fine from mid July 2025 till Oct 14 th 2025 , when it started shaking and was running rough and engine light was on so I had it checked for codes to see what it needed. Came back as bad injector. So we took to local mechanic to have injector replaced and tuneup and coils replaced . After this was completed was running much rougher then before we even had that injector and tuneup done. So mechanic suggested for him to keep it and let him dive deeper into what was wrong and why it was running rougher than before, so we let him do that.. after two days, he came back and told us that there was a crack in the engine and that is why it was running rough and that it probably was going to have an engine failure and might be and must be replaced. So I looked up my VIN number to see if there’s any recalls for my particular truck and engine size which is a 5.3 L and it doesn’t show my particular truck but it does show my year of a Silverado and the 3.6 L engine has had the same issues so I was wondering if this recall should be extended to the 5.3 L 2018 seems to be the same problem with the engine block.

1. The components that failed were the transmission because the vehicle was driving and continued to slow down until it came to a complete stop gradually, and had to be pushed home. And also, there was an issue with the doors unlocking on their own and all windows rolling down by themselves. 2. The safety risk was the issues that happened without any knowledge of any issues at all with the vehicle. And the vehicle could have stopped on the highway, and another vehicle could have run into it, and it could have been a very bad incident. And with the doors unlocking and the windows rolling on their own could be exposed to unsafe environments and possibly theft of the vehicle or harm to the occupants. 3. Had a scan done, which showed the issues that were going on with the vehicle 4. I haven't had a chance to have it taken to the manufacturer because it broke down, and I was waiting for some help to get these issues repaired from the manufacturer. And needed from ACC. 5. There wasn't no indicators or lights on when this happened? I was told by a coworker about the windows being down, and with further investigations, I found the doors were unlocked as well, which was done automatically without my control.

TRANSMISSION STARTED SHIFTING WEARD CONTACTED DEALERSHIP. THEY STATE THIS UNIT IS NOT UNDER RECALL BUT IT IS AN 6L80 AND IT IS ALL OVER YOU TUBE AND THE INTERNET ABOUT FAILURES THAT START WITH THE PM VALVE AND/OR THE TORQUE CONVERTER HOUSING THAT IS STAMPED BUT MOUNTING BRACKETS ARE WELDED TO IT CAUSING HARDED STEEL TO MEET STAMPED STEEL CAUSING FRICTION AND WEAR THAT POLUTES THE REMAINDER OF THE TRANSMISSION AND CAUSES FAILURE BEFORE 100000 MILES; USUALLY JUST AFTER 50000ISH. WHEN TRANSMISSION FAILS IT CAN CAUSE LOSS OF PROPULSION OR COLLION.