2018 Chevrolet Silverado 1500: engine failure

Filed Aug 21, 2026 · Electrical · NC

i was driving down the highway, turned on left signal to make left turn. the truck engine died with no warning, could not steer, almost ran into bank. all the dash lights went black, no power at all. the radio starts playing on occasion without being turned on. the clock loses time when it wants to.the blower on the ac comes on and off when it wants to.have had battery, alternator, ignition system checked. all these check out just fine. there were no codes , and absolutely no lights or warnings on dash. our truck was still in the highway lane. luckily the police stopped and assisted by directing and holding up traffic as necessary. i have had similar issues on other occasions but was always more brief and the truck would crank back up right away.

Filed Feb 3, 2026 · Engine · 77,000 miles · SC

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that upon cold starting the vehicle, there was an abnormal ticking sound coming from the vehicle. There were no warning lights illuminated. The local dealer was contacted, and suggested that a diagnostic test be performed. The contact called two other local dealers, Herndon Chevrolet Service (5617 Sunset Blvd, Lexington, SC 29072) and Jim Hudson Chevrolet Service (111 Newland Rd, Columbia, SC 29229), but the vehicle was not diagnosed or repaired. The vehicle was taken to two independent mechanics and was diagnosed with engine failure. The manufacturer was contacted and offered a gift card towards the purchase of another vehicle. The failure mileage was approximately 70,000.

Filed Jan 22, 2026 · Electrical, Engine · MN

My truck has been into the dealership repeatedly from Aug 2024 to where it sits now to this day because of the engine and the electronic fuel management system. This fuel management system has destroyed my engine by allowing excessive oil consumption to which it turns the oil black. The engine goes from v8 to 4 cylinder to save on fuel which makes the engine work harder. It causes the rocker arms and pistons to work harder which makes them fail. These problems have occurred with my truck and now the dealership wants 20,000 to replace the engine when they worked on it continuously even after my warranty period had expired. Keep in mind that they were still fixing these problems when my warranty hadn't expired yet they fail to fix it properly. I make payments on a truck that I hardly ever get to drive. I have service invoices to back up my claims. There are numerous others that are dealing with this problem and it's all over the internet so i am not the only person

Filed Nov 10, 2025 · Engine, Transmission · OK

2018 6.2l engine dropped 3 lifters at just a little over 70k miles. Vehicle is my wife’s and almost caused her and my child to have an accident while traveling on highway at posted speed. Vehicle lost power that resulted from premature engine failure resulting in vehicle losing power to the brakes and steering while in heavy traffic. This directly affected my wife and immediately caused her to have a panic attack. Vehicle has always been maintained to the highest levels. This issue affects a substantial amount of these motors around the same mileage. Very bad and unsafe AFM design that is common among vehicles with this engine. Transmission is also experiencing studdering/vibration issues. Right now we have paid out over 5k for engine repairs. Transmission needs repaired and presents a constant safety risk to our family as well as others. GM needs to stand by their products as we consumers put our trust in these vehicles to be safe and to last more than a few miles. My wife and I both have to work and unfortunately we don’t have the extra funds to purchase another vehicle or to keep shelling money out to fix a basically new vehicle that we have babied. Please help us hold companies accountable for their failure to stand behind their products. Thank you for your time.

Filed Oct 22, 2025 · Engine, Transmission · NY

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.

Filed Aug 8, 2025 · Engine · MI

I own a 2018 Chevrolet Silverado (8‑speed, ~81,000 miles). The engine has been audibly ticking, and the dealership confirmed hearing it during diagnosis. This aligns with known AFM lifter collapse issues in the L86 Gen V V8, a design failure rather than simple wear. I’ve consistently used premium Schaeffer 0W‑20 synthetic oil, changed regularly on schedule. Maintenance logs and receipts are available. So far, the engine hasn’t completely failed, but lifter collapse can spiral into catastrophic camshaft or short‑block damage—with no advance warning and high risk of sudden failure. I haven’t had an accident yet, but the ticking is driving home how precarious this is—one mile closer to a full grenade without warning. I’m reporting this in the hope the federal safety agency will identify a widespread safety risk in these L86 lifter failures and prompt a formal investigation or recall to prevent sudden engine failure in similar vehicles.

Filed Jul 24, 2025 · Acceleration, Engine · PA

10 miles from home on [XXX] after Thanksgiving with my children sleeping at [XXX] in snowy cold weather, my engine began to fail. Power was limited on hills and the check engine light would come on and go back off when on flat or downhill. The next morning I took my truck to the dealer that I purchased it from where I was told the lifters had failed and I need a new engine. 1000 miles after I replaced my engine my transmission failed completely requiring a transmission replacement. Immediately upon picking up the vehicle and going down a long hill in the area, engine breaking turned on as expected but as the truck tried to slow itself, after 2 or 3 downshifts, the transmission began making a loud grinding sound and while still going close to 50 MPH, the speedometer showed 10-15 MPH and the tach dropped to idle. The transmission was decoupled from the motor. When gas was reapplied it seemed to make the connection again and resume normal driving. I called the dealership whose techs did not believe me and told me that I could 'turn off' the engine breaking feature. The situation continued to worsen each drive and it would do it more often. This was unacceptable and they finally had a tech ride with me to experience it and immediately agreed there was an issue and reordered another transmission. The third transmission did not fix the issue and was experienced immediately. They are now guessing how to fix the issue telling me I have to replace the transfer case out of my pocket with no diagnosis, not sure what is causing it and have not fixed the problem. Videos would not fit in upload due to size. Videos show speedometer failure. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 1, 2025 · Engine · MN

My 2018 Chevrolet Silverado with a 6.2 engine suffered a Connecting Rod Bearing failure causing the engine to seize/lock up. The engine components are available for inspection. The engine seized/locked up and could have caused a crash. The vehicle is at my mechanics shop right now and will remain there until it is repaired. The vehicle has been inspected by my mechanic but no one else. The engine had developed a "tick" at idle and while driving. My mechanic found a bent pushrod in the engine and then found the engine suffered a camshaft lifter failure. He replaced all the pushrods, camshaft lifters, and the camshaft. It had been repaired and had been driven for a test drive. There were no warnings the engine was going to to fail. The engine just locked up without warning. The engine was removed from the pickup and was then disassembled and found to have had a connecting rod bearing failure on cylinder 7 and cylinder 8.

Filed Jul 1, 2025 · Engine · 110,000 miles · AZ

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, there was an abnormal sound coming from the engine. In addition, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic who diagnosed the vehicle with coolant intrusion into cylinder #7, causing engine failure. The contact stated that metal shavings were found mixed in with the engine oil. The contact stated that the vehicle was consuming an excessive amount of engine oil. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 110,000.

Filed May 28, 2025 · Engine · TX

On 4/18/25 I was driving to work and was about 2 miles from work when I started to get all kinds of faults displaying on my screen. The engine started to run rough; it sounded like it was not running on all cylinders. After work I drove it straight to the maintenance shop I have been using. They informed me that a lifter failed and went into the cam shaft and created all kinds of metal. I was informed that this was the second Chevrolet Silverado they have had this problem and replaced the engine.

Filed May 24, 2025 · Engine, Transmission · MS

My vehicle has had transmission and engine problems that should not have been an issue until after at least 100,000 miles. At 11,577 miles I reported hard down shifting as well as a hard shift / kick when going from reverse to drive when the transmission would feel like it would slip and then kick when shifting from 1st to 2nd gear on automatic transmission. There were no codes and dealership said they couldn't duplicate problem. At 58517 miles the service 4x4 warning light came on as well as a shifting problem was continuing. A transmission valve body was replaced and a transmission service / fluid replacement was done under warranty or extended warranty. The shifting problem has continued. It has come to my understanding that Chevrolet put out a bulletin about changing the transmission fluid should solve the problem and to tell customers that some hard shift could be normal and not a problem. And I have heard about some class action lawsuits that have been filed. A second and more major issue was the 5.3 liter engine failure that occured at 62,093 miles after having a tapping noise develop and some loss of power. But this issue began earlier at 40,125 miles when I had a fuel injection clean due to it running rough. Extended warranty replaced engine with a used motor and I was still charged $1158.93 for amounts extended warranty didn't cover. My Son's 2015 Silverado 1500 which I owned previously had to have the transmission rebuilt for just under $5,000 just out of extended or manufacturer's warranty. We don't pay $60,000-$70,000 to have engines and transmission fail before 100,000 miles and before the loans on vehicles are paid off. We shouldn't have to be paying a loan on a vehicle we can't even drive because it is in the shop for an extended period of time. At 62,298 miles after getting the truck back from the engine failure, the starter then failed and was replaced under extended warranty with $133.76 cost going to me.

Filed May 2, 2025 · Engine · MN

In May 2023, my 2018 Chevrolet Silverado 1500 with the 6.2L V8 engine experienced a catastrophic engine failure at 82,986 miles. The failure involved the camshaft, lifters, oil pump, and other internal components. I paid $7,319.63 out of pocket to have the engine disassembled and repaired by a certified mechanic. I recently learned GM issued a recall (the federal safety agency Recall No. 24V266) for 2021–2024 vehicles with the same engine due to internal engine failures caused by crankshaft and rod bearing defects. Although my 2018 model isn’t included, the failure I experienced closely mirrors the conditions cited in that recall. I believe the same defect may exist in earlier models like mine. I’m submitting this complaint to urge the federal safety agency to consider whether the recall should be expanded to include additional affected years.