The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving 40 MPH, there was a clunking sound coming from the engine. The check engine warning light was illuminated. A dealer was contacted. The contact stated that several unknown messages were displayed. The contact stated that an independent mechanic had inspected the vehicle and informed the contact that the engine needed to be replaced. The vehicle was towed to a dealer where it was diagnosed that the lifters and cam phasers needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 43,000.

- Cape Coral, FL, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of automotive power, with an abnormal knocking sound coming from under the hood. No warning light was illuminated. The vehicle was taken to a local independent mechanic, where it was diagnosed with engine lifter failure. The vehicle was not repaired. The local dealer was not contacted. The manufacturer was made aware of the failure. The failure mileage was approximately 68,000.

- Joplin, MO, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that upon starting the vehicle there was an abnormally loud screeching sound coming from the vehicle, and the engine seized. The contact stated that the transmission was shifting hard. There was an abnormal banging sound coming from the vehicle. There were no warning lights illuminated. The vehicle was towed to the local dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired. The Carfax and GM global connect portal warranty document noted an abnormal loud banging noise and front-end damage at 1 mile prior to the purchase, and an insurance claim was filed for the rear main seal. The manufacturer was contacted, and the contact filed a claim. The failure mileage was approximately 29,606.

- Stroudsburg, PA, USA

While driving at 35 mph my check engine light, Service Parking Break light, ABS Maintenance light all came on and my truck lost power to a point I could not go over 10 MPH. It started chugging and running very rough. Fortunately I was close to home and got it in the driveway. I called the dealership to set and appointment, tried to drive it down my driveway and couldnt get it over 10 MPH. I called a tow company to take it to the local dealer I purchased from. After a couple days the dealership called and said there is a lifter problem but wasnt fully into the engine to see if there was more damage and would call me once more testing had been done. I have photos of the tow company tow bill ($169) and a photo of them lowering the bed to put the truck on it to haul to dealer if needed.

- White Lake, MI, USA

CEL with code P1098 - which is a coolant control valve issue. Engine is not properly distributing coolant potentially causing an overheating condition. Dealer informed me that it is dangerous to drive and it is recommended that it is left at the dealer until it is repaired. If driven and other issues occur do to this failure the warranty will not cover damages. The failed part - coolant control valve is on national backorder and there is no eta on when the part will be available, no vehicle has been provided and the replacement part appears to be no different than the original except for a different model number.

- Huntington, NY, USA

While driving on the highway the engine shimmered and shut down. I lost all steering and braking power. After 20 minutes I was able to restart and drive off the highway at a reduced speed. upon exiting the engine died again. The following day I took it to sunrise Chevy in Glendale Hights IL as this was just down the road from where it sat all night. Service rep called and said I need a new engine with only 81000 miles. It was major lifter failure he said. Job was done at a cost of $9417.89. With less than 1000 miles on the new GM engine I was coming home on [XXX] at night when I lost all power to steering and brakes, dashboard lit up. Made it to the shoulder and towed back to the dealer. Once again major engine failure. At least this one was under warranty. but still very dangerous on the highway. Needs to be a recall please. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Palos Hills, IL, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving 75 MPH, the vehicle failed to properly respond. There were no warning lights illuminated. The contact stated the vehicle shut off and failed to restart. The contact pulled over to the side of the road and attempted to restart the vehicle; however, the vehicle was not making a sound. The contact checked the battery and believed that the engine was inoperable. The contact towed the vehicle to the residence. The vehicle was not taken to a dealer or to an independent mechanic to be diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 87,005.

- Speedwell, TN, USA

I was driving down the road at no more the 15 mph up hill in 4x4 when the engine shut off. No warning lights or noise and would not turn over. Had it towed to the local dealership to find out the main thrust bearing seized. I have to wait two to three months for a new engine which is covered under warranty. No wheels in the meantime. Only has 25,640 miles on it.

- Madawaska, ME, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving 55 MPH, the "Low Oil Pressure - Turn Off Engine" was displayed and the vehicle experienced a loss of automotive power. The contact pulled over to the side of the road to turn off and restart the vehicle; however, the vehicle failed to restart. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to a local dealer where the vehicle was diagnosed, and the contact was informed that the engine was faulty and needed to be replaced. The vehicle was repaired. The contact referenced NHTSA Action Number: PE25001 as a possible cause for the failure. The approximate failure mileage was 43,986.

- Detroit, MI, USA

Engine shut off on me while I was driving and wouldn-??t crank back on. Had it towed to a dealership and they told me the engine is locked up and no idea why. It on has 61, xxx miles on

- Zephyrhills, FL, USA

I was driving 60mph and went to accelerate a little bit more and my lifters went out and stated clicking.

- Houston, TX, USA

Camshaft bearing failure. Catastrophic engine failure while accelerating at left turn. Required full engine replacement. Incident occured at 59,982 miles on odometer. Even though vehical was under manufacture warranty it took approx. 18 days for GM to assume responsability. I was required to produce all maintenance records and was left without a vehicle for this time. Company was not clear on what work and parts of this repair would be protected under further warranty. Company did not provide exact specifics on replacement engine year and place of origin.

- Plymouth, MI, USA

6.2 engine failure second motor put in last week dealer took for test drive truck was towed back for second engine failure

- Algonac, MI, USA

I purchased this vehicle brand new is 2021 with the 6.2 liter engine. I have had all the regular maintenance performed as scheduled with 90% being done at a Chevrolet dealership. My truck has around 90,000 miles on it and now the engine is out. It started with showing low oil at 50% oil life left. When I took it to have it checked, it was 3 quarts low on oil. I did another oil change and was told I had to start an oil consumption test in order for them to review the issue. I had it checked every 1000 miles. The first and second check was fine. The third check was one quart low. They took it in and found that the spark plugs were oil fowled. Upon further investigation, they found that the cylinder walls were scored and had oil bypass in the cylinders. I have done everything right with this truck. Took care of it in all the ways I was supposed to. There is no reason what so ever for the engine to have gone out at 90,000 miles. There has to be more to this. I have looked it up and other people are having the same issue with the same engine. Why is nothing being done about this?

- Cartersville, GA, USA

Had the check engine and recieved code p0303 cylinder 3 misfires i replaced fuel injectors on that side spark plugs, wires, spark plug solenoid, and still had the check engine p030 and would not run right my mechanic had to take the head off and replace all the valves of the motor costing me more than $5,000 i am so embarrass cause i was so honored to buy this silverado, but at 60,000miles this should nit happen why am i throwing alot of money to this truck gm you guys are letting me down i always by gm but at this point i dont know can you make this right, and no i dont want a 10 percent discount in a new one that a slap on my face.

- Mercedes, TX, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that the vehicle was making an abnormal knocking sound while driving at various speeds and while idling. There was no warning light illuminated. The vehicle was taken to the dealer, where the engine lifters were replaced; however, the failure persisted. The vehicle was taken back to the dealer, where the contact was informed that the engine abnormal knocking sound was not sufficiently loud to issue a recall. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: PE25001 (Engine, Engine and Engine Cooling). The manufacturer was not notified of the failure. The failure mileage was approximately 11,000.

- Hawley, MN, USA

What component or system failed or malfunctioned, and is it available for inspection upon request" The component that failed is the lifter in my 2021 GM truck, which caused severe engine damage. The vehicle is currently at the dealership and is available for inspection upon request. How was your safety or the safety of others put at risk? My safety and the safety of my child were significantly put at risk when the engine failure occurred on the freeway while traveling at 65 miles per hour. Multiple warning lights illuminated on the dashboard, and the truck became hard to control. I was fortunate to maneuver the vehicle safely out of traffic without harm, but the sudden loss of engine power could have led to a serious accident. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, the problem has been confirmed by the dealership, which conducted diagnostics and determined that the lifter malfunction caused severe engine damage, necessitating a full engine replacement. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle has been inspected by the dealership, which is an authorized service center for GM. However, it has not been inspected by the manufacturer directly, police, or insurance representatives. 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 warning lights, messages, or any other symptoms prior to the failure. The vehicle was driving normally when, all of a sudden, it began to shake and slow down,

- San Tan Valley, AZ, USA

Diesel engine continues to overheat, even after the oil temperature sensor failure dealership repair. Truck is very well maintained. However, common and trending issue amongst 1500 Silverado diesel owners is overheating which causes engine to loose power while driving and even get so hot it can catch fire. Warning lights appear only when problem is at engine failure point. Also, we lost power or reduced power on freeway which almost caused an accident and engine was smoking. We had it towed to Epic Chevrolet in Sacramento, CA. Within one week of dealership repair covered under powertrain warranty, dealership said overheating engine is due to a -??new-?? code for coolant pump. In short, fire and driving safety hazard that can cost lives if not addressed by NHTSA.

- West Sacramento , CA, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while her husband was driving 40 MPH, the vehicle hesitated and jerked. The contact's husband depressed the accelerator pedal, but the vehicle lost motive power. The message, "Put on Neutral and Stop" was displayed. The contact's husband pulled over to the side of the road and the vehicle stalled. The vehicle failed to restart. The vehicle was towed to the dealer where it was diagnosed that the engine had failed and needed to be replaced. The contact's husband towed to vehicle to another dealer where it was confirmed that the engine had failed and needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 90,000.

- Sheridan, AR, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving on the interstate at approximately 70 MPH, the vehicle lost motive power. The vehicle failed to accelerate over 35 MPH. The vehicle went into Low-Power Mode. The check engine warning light was illuminated. The driver was able to take the exit ramp and continued driving. The vehicle was taken to the local dealer, where it was diagnosed that the camshaft and cylinder head needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 91,000.

- Conway, SC, USA