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

- Haleiwa, HI, USA

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)

- Franklin, PA, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving approximately 70 MPH, the -??Service Stabili-trak-?? message was displayed on the instrument panel. The contact stated that the instrument panel went black, the vehicle lost motive power and decelerated unintendedly. The contact was able to coast to the side of the road. The contact waited approximately 10 minutes before restarting the vehicle and continued driving. The warning light was no longer illuminated. The failure occurred two more times while driving to the residence. The vehicle was taken to several certified mechanics who were unable to determine the cause of the failure. The manufacturer was informed of the failure and opened a case. The manufacturer assisted the contact in scheduling an appointment with the dealer. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 123,000.

- Springfield, OH, USA

I-??ve had to have the transmission replaced before hitting 123k miles There is a constant shake, tremble in the car that dealer mechanics cannot figure out and they relate the issue to the transmission Electrical dashboard and ac lightning fixture burnt out

- Fontana, CA, USA

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.

- Wannaska, MN, USA

2018 Chevy Silverado 5.2L with V8 engine equipped with AFM system broke down while accelerating onto a on ramp for the highway going 40 mph. Truck failed to accelerate any faster and a loud knocking noise occurred with a check engine and traction failure light. Safety was put at risk as there was no where to pull off and my truck had no power to it while accelerating onto a very busy interstate. The truck was towed to a Chevy dealership and determined the lifter valves were ticking form both sides and require replacement of them all and the cam shaft.

- Grand Ledge, MI, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that the engine sounded abnormally rough, with a knocking sound coming from the engine. In addition, several unknown warning lights were illuminated. The contact stated that the vehicle lost motive power and was pulled over to the shoulder of the roadway. The vehicle was restarted; however, the failure reoccurred. The vehicle was towed to the dealer where it was diagnosed with failed lifters. The contact was informed that the lifters needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The manufacturer was not made aware of the failure. The failure mileage was approximately 60,000.

- Holly Springs, MS, USA

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.

- Fort Worth, TX, USA

Both upper control arms have broken off at the ball joints. Also the cam and Lifters are failing and this vehicle has been maintained in accordance with the manufacturer guidelines.

- Alachua , FL, USA

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.

- Clinton, MS, USA

This 2108 vehicle had 56174 miles on it in October 2023 when the starter went bad, then with 56382 miles on it in November 2023 the lifter failed and the engine had to be replaced and then with on 56838 miles on it in Dec 2023 the engine light came on and the dealership replaced the canister and solenoid. All in a 3 month time. Chevy says it happens. Then we start reading it is a problem with their 2019 to 2024 vehicles. Maybe it goes back more.

- Cyrus, MN, USA

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 (NHTSA 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 NHTSA to consider whether the recall should be expanded to include additional affected years.

- St. Bonifacius, MN, USA

The engine/ transmission has been rebuilt 3 times now and still having issues. The RPM goes up out of nowhere. Something is wrong with the truck. I have taken it to my mechanic over 10 times in the past year. It is still having transmission issues even after being repaired 3 times by a transmission shop.

- Garland, TX, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving 70 MPH, the vehicle lost motive power and the lifters collapsed. The contact was able to pull over safely. The contact stated that the engine and ABS warning lights were illuminated. The vehicle was towed to the residence. The contact called the local dealer, who informed them about the diagnosis and the cost for the repair. The vehicle was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline. The failure mileage was approximately 120,000.

- Chatsworth, GA, USA

I well maintained my 2018 Chevrolet Silverado, and now the motoer is failing, loss of power and just started smoking from exhaust, my mechanic said that the motor is in the process of blowing up. I made every oil change, and maintained the vehicle because I wanted it to last and be the last vehicle I had to purchase. It failing almost caused a bad accident on the interstate, but luckily I was able to avoid an incident and get to safety.

- Mabank, TX, USA

An independent service center confirmed that the water pump failed and fell apart. This water pump is a 4-groove pulley (part number 12685259) specific to my vehicle. Most other Silverados have a 6-groove pulley system. This 4-groove pulley water pump is unavailable from the dealer or any of the part stores, as they are on back order with no resolution or availability date. GM has notified some parts stores that this part has been discontinued and is no longer available. This truck is less than 10 years old. There are no other parts, either aftermarket or otherwise, to replace my water pump. The water pump is a vital engine component needed to prevent significant engine damage, and without it, the truck can not run independently without overheating. It is essentially the heart of the automotive cooling system, because the truck water pump function is to continuously circulate the engine coolant from the radiator to the engine and back to the radiator. I have had my truck in an independent service center since January 2025, waiting for this part, which is unavailable. I do have the original part at the shop available for inspection. There were no warning lamps, messages, or other symptoms of the problem before the failure; it just started making a clanking sound, and I immediately took it to a shop, and have been out of a vehicle for 5 months.

- Anchorage, AK, USA

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated while driving 35 MPH, the vehicle went into LIMP Mode and was slow to respond as needed. The contact stated that there was smoke coming from the exhaust. While driving, the rear end locked up. The contact stated that the vehicle was slipping, and the vehicle shut off while driving. The contact stated that several unknown warning lights were illuminated. The contact replaced the spark plugs, coil pack, and spark plug wires with a misfire in cylinder #6. The contact stated that the fluids were replaced at an unknown local dealer prior to the failure. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 170,000.

- Haverhill, MA, USA

Engine all of a sudden had no power or acceleration. Started shaking and thumping extremely loud.

- Healdton, OK, USA

I purchased a used 2018 Chevrolet Silverado High Country (VIN: [XXX] ) on [XXX], with 24,375 miles. On the day of pickup, the truck felt like it was driving over rumble strips. Dimmitt Chevrolet flushed the transmission and used the updated Mobil 1 HP LV fluid. This worked temporarily, but the shudder returned. CarMax then sent the truck to Burke-??s Transmission in Sarasota, where they replaced the torque converter. However, the shop declined to rebuild the transmission, citing its complexity. I later brought the truck to Cox Chevrolet in Bradenton. Despite clearly describing the shudder, harsh shifting, and driveline clunk, they told me the behavior was -??normal-?? and refused to investigate further, stating, -??We-??ll look into it once the unit fails completely.-?? The symptoms have worsened. Harsh 1-?"2, 2-?"3, and 3-?"4 shifts are back. Shifting into Drive causes a loud clunk and forward lurch. Cold starts cause bucking and sudden stopping. I-??ve replaced the tires, Bilstein 5100 rear shocks, and front suspension parts, but the problem persists. I signed on to a class action lawsuit against GM over the 8L90 transmission, but my claim was denied. This issue is well-documented and matches reports from many other owners. It affects drivability, safety, and long-term reliability. GM and its dealers have failed to properly address this known transmission defect. I urge NHTSA to investigate further. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Parrish, FL, USA

Lifter problem misfire

- Florence, MS, USA