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

I was driving my 2021 Silverado when i was stopped at a 4 way waiting my turn. When it was my turn i made a left hand turn and and travelled a short distance going 20-25 mph when my engine made an odd sound and shut off in traffic!. I attempted to restart it and it did noting. Truck was towed to Hendricks Chevrolet where the truck was bought and received regular maintenance. When the truck stopped in traffic there were no warning lights on the dash before during or after. Once the truck was at the dealership for inspection i was advised That the motor was sized and that number 1 and 2 rod bearings failed and were ground in the crank journals. I asked how could that happen when the the truck has had regular oil changes by them and is there an issue with these engines? I was told that they see a few 6.2 engines with these types of issues.

- Kansas City, KS, USA

Engine failed, crank bearings let go. Truck lost power while traveling down the road.

- Clermont , FL, USA

Baton Rouge Louisiana

- Batonrouge, LA, USA

Baton Rouge Louisiana

- Batonrouge, LA, USA

Vehicle feels like it's hitting a bump down the road 65 miles an hour. There is no bump it's the transmission. My truck has 80240

- San Antonio, TX, USA

Engine Seized up on me while driving on the freeway. Four of the crankshaft bearings seized up and one of those four completely melted. good thing the freeway I was on was not too crowded, my dash just all of a sudden lit up saying shift to neutral to restart engine. I was able to get to the shoulder. I tried re starting the engine and nothing happened. I had it towed to Simpson Chevrolet in Irvine CA. they reported back to me and said Engine has seized and I will need a new engine, cost of $16,893. I cannot afford a new engine right now and have been left without a vehicle. GM has taken no responsibility for this failure even though all maintenance has been performed on time every time.

- Lake Forest, CA, USA

The contact owns a 2021 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 vehicle came to a complete stop. The contact shifted into reverse and parked the vehicle. No warning light was illuminated. In addition, the contact stated that the failure had occurred while facing oncoming traffic. The vehicle was towed to the dealer where it was diagnosed with a failed check valve ball. The contact was informed that the check valve ball body and plates needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure and a case was filed. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 52,648.

- Whittier, CA, USA

Had vehicle in for service for oil change and a loud clicking noise as well as misfire was the vehicle was fine to drive proceeded on my trip on my way back to my hometown the motor through a pushrod while on the highway

- Wichita, KS, USA

Truck died on busy road. Towed to certified Chevy dealer. They heard knocking noise did oil change drove it truck died again. Stated engine seized. Warranty dept denying claim saying truck driven 30 seconds to 1 minute after oil pressure light came on. But no lights came on for us and verified from diagnostic done at the Chevy dealer.

- Mays Landing, NJ, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving at approximately 35 MPH, the engine started to misfire. There was an unknown service warning light illuminated. The vehicle was taken to the local dealer, where it was diagnosed that left side valve lifters needed to be replaced. The codes displayed were 0329 (Engine/Fuel Exhaust) and 6581 (Modular Component) registering incorrectly. The vehicle was repaired. The manufacturer was not contacted. The failure mileage was approximately 15,253.

- Holly, MI, USA

The first time it happened my Truck started shaking a lot on the highway and it left me stranded on the side of the road. It had around 20,000 miles on it. When it got repaired I was told it had to do with the lifters on the left side of the engine. Took them 2 weeks to fix the issue. The second time it happened was on the ramp getting on to the highway, this time at 58,000 miles and now the right side lifters. Except this time they couldn-??t fix it and they are going to replace the whole engine and give me a new one. Only thing is that it's been in Chevrolet shop for over 2 months and they have an ETA of a new Engine arriving in about a month if even that. So currently don't have my truck.

- Bothell, WA, USA

Engine misfire, likely engine will need to be replaced

- Utica, NY, USA

Around [XXX] on [XXX] the vehicle shut down with no codes showing or any warning. The weather was approximately 13* f. After many failed attempts to restart, and the electrical systems would not power down as if the vehicle thought it was still running. The only way to get the system to shut down was to disconnect the battery. i had to physically push the vehicle to a safe location. The next morning I attempted to diagnose the issue with no success. I had the vehicle hauled to the dealership from which it was purchased in Idaho to have it inspected. Tuesday morning I received word from the dealership that the engine suffered major failure. This will be the 3rd engine in the vehicle. I am uneasy about the dependability of the vehicle as I have recently discovered that this particular engine is having massive failures all over the country. So much so that the NHTSA has opened an investigation for the purposes of safety. I purchased the vehicle for the main purpose of pulling a snowmobile trailer with snowmobile to the mountains and also to tow my boat and trailer. Both of these activities require a vehicle in which I can depend on. While I am waiting for a back order engine the dealership and manufacturer refuse to lend a like vehicle, leaving destitute. I am hoping that this agency can offer some assistance, and I believe it's important that you are made aware of the hazard that this particular engine possesses. As I previously mentioned this the 3rd engine and As far as I can see this will occur again putting myself and others potentially in harms way because of a known issue. This does not make me feel confident of the safety of the vehicle. Be aware where i live there grades in every direction and extreme weather conditions from season to season. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Spokane, WA, USA

2021 Silverado LT Trail Boss 6.2 (production date: 01/2021) was taken to the GM/Chevy dealer (Ed Morse Chevrolet) on 01/29/2024. It was confirmed by the GM mechanic that the engine had failed (75k miles) due to a shattered camshaft and metal in the engine and a complete engine replacement is needed. Had prior complaint at around 6k miles for engine noise along with hard shifts and a check engine light that had appeared then went away on its own (documented). I was told by a GM certified dealership, it was normal in the new trucks and no action was taken. Unsatisfied, I made another appointment for a second opinion and only regular maintenance service was suggested and performed several days after, at a GM certified dealership. All oil changes have been performed in a timely manner. No forewarning prior to engine failure to include check engine light or any system messages, although trucks performance from the initial complaint did not subside. To my knowledge, this vehicles engine is weighing heavy on consumers safety with engine failure and is a well documented issue, leaving many stranded. Thank you!

- Cooper City, FL, USA

The truck jerks when first driving and will jerk and lundge at various times and speeds. There is a almost grinding nosie. It often says "Reduced Engine Power" and the engine light comes one, the "Service ESC" notice comes on with the vehicle light, when this happens the truck will barely accelerate even if flooring the gas, continues to make a grinding noise. This happens frequently, but then lights go away, then come back on. Dealership pulled multiple codes (image attached). This is a huge safety risk due to failure of acceleration, and the jerking that causes the truck to jerk while in motion and slow.

- Mansfield, OH, USA

With absolutely no warning, the 6.2 liter V-8 engine with 28,500 miles on it seized up solid and would not run. I was stranded in heavy Christmas traffic and completely blocked one lane. It was an unsafe situation. I had to summon a wrecker to come and tow the vehicle, and I called 911 for police presence to alert and direct traffic. The vehicle was at the Chevy dealer for a month while they installed a new engine. The dealer never fully confirmed what the cause was - I don't believe they really know - and I only have 10 months of warranty left. I am concerned about another failure and thought I should at least get the warranty on the new engine re-set to 60,00 or more miles.

- Cedar Rapids, IA, USA