The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving off an off-ramp at approximately 40-60 MPH and depressing the brake pedal, the vehicle suddenly lost power and turned off. The contact restarted the vehicle to continue driving. The failure had occurred twice. The contact stated that while driving at various speeds and depressing the brake pedal, the brakes grabbed, causing the vehicle to lunge forward, decelerate, and then lunge forward again, before coming to a complete stop. The contact shifted to park(P) and then to drive(D) and continued driving. The check engine warning light was illuminated. The vehicle was taken to the dealer four times before receiving notification of NHTSA Campaign Number: 24V797000 (Power Train). The dealer was unable to determine the cause of the failure. The vehicle was taken to the dealer, and the recall repair was performed. The contact stated that one hour after the recall repair, the failure recurred with the check engine warning light illuminated. The dealer was informed of the failure; however, the vehicle was not diagnosed or repaired again. The manufacturer was informed of the failure. The manufacturer referred the contact to the dealer for assistance. The failure mileage was approximately 56,000.

- Valdese, NC, USA

The 3 and 4 cylinder need to be replaced at 130000 miles with regulate maintenance always maintained

- Nashua, NH, USA

2021 Silverado 1500 Trail Boss LT with 6.2ltr V8 L87 had sudden catastrophic engine failure at 90,000 miles with excellent and routine maintenance up to. Findings were a broken timing chain, cracked piston and debris in number 8 intake port. Vehicle lost propulsion on the highway posing a safety risk to the driver, passengers and other vehicles on the roadway. Dealership confirmed the findings. There were no warning signs, signals, lamps, beeps, noises or any other indicators that there was an issue with the motor. It unexpectedly and suddenly failed without warning.

- Warroad, MN, USA

General Motors is selling vehicles that are unsafe, unreliable, and unfit for consumers. My experience shows a clear pattern of negligence, misrepresentation, and disregard for public safety. On or about April of 2021, I purchased a 2021 Chevy Silverado RST z71 from Vetter chvrolet for about $56,000. GM promoted this vehicle as safe and dependable. Within the short 4 years of owning this truck, I faced major failures: engine issues, transmission problems and electrical malfunctions causing the parking break to engage on its own, at highway speeds of 70-80 mph on which nearly caused a serious accident, and failed Electronic Stability Control (ESC) system. This system helps maintain vehicle control, and a problem with it can affect braking, steering, and handling, Despite following GM-??s maintenance guidelines, GM delayed repairs, denied coverage on certain failures, and left me with thousands in out-of-pocket costs. The vehicle remains unreliable and unsafe. For myself and my family, 2 children under 3 years old and one on the way. This is not an isolated issue-?"GM has a long history of recalls and defect cover-ups. These vehicles put lives at risk, cause financial hardship, and violate consumer trust. No one should fear for their safety in a vehicle marketed as -??dependable.-?? This has impacted me by having : -?? Expensive repairs -?? Loss of transportation for extended periods -?? Ongoing fear of driving a defective vehicle with my family in it. Loss of use of my vehicle -?? Fear and emotional distress driving an unsafe product I have contacted GM and the dealership multiple times. Responses were dismissive, repairs were inadequate, and GM refuses accountability. Requested Resolution: Full reimbursement for all related costs Buyback (preferred) of the vehicle OR permanent repair at no cost Public acknowledgment and stronger quality control. Warning to Consumers: Think twice before trusting GM. Their failure to correct dangerous defects shows profits matter more than safety.

- Three Rivers, MI, USA

So many vehicles like mine have si.ilar issue. Lifter issues causing engine damage and other part damage. Causes issues at high-speed with power and stranded motorists on dangerous highways. It is a safety issue because you could be stranded in middle of highway. Lifter issues causing bent pushrods and other engine part damage costing. I had one pushrod covered, but others failed and now thousands in repairs. In expensive vehicles. Also towing charges, hotels, rental cars, etc... I dont want to be stranded again as only one bank was all replaced. The entire top half of the engine should be fixed and should be replaced and a service bulletin and recall should be issued to help.protect consumers.

- Saint John, IN, USA

On, or about, 10 June 2025 I attempted to start my 2021 Chevrolet Silverado (with the L87 engine) and noticed an extremely rough idle. I shut the engine off and attempted to restart the engine, the idle was rougher than previous and then white smoke started billowing out of my exhaust. At that point I called a wrecker to take my truck to the service center at my dealership. After the dealership diagnosed my engine they stated that it had failed due the defect in the L87 engine that is currently the subject of an active recall. The service center informed me I would need a replacement engine under the warranty but could not give me a timeline, I have been in constant contact with my service advisor and they indicate that GM has no updates as to where I am in the queue, or how long it may be before my replacement engine will be sent. As of writing this complaint it has been two months with no updates from the manufacturer.

- Fort Worth, TX, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 30 MPH, the rear wheels locked up, causing the vehicle to slide across the road. The contact was able to regain control of the vehicle and came to a stop in the middle of the road. The check engine and traction control warning lights were illuminated. The contact turned off and then restarted the vehicle and became aware that the transmission failed to shift into the intended gear. The vehicle was towed to the contact's place of employment. The contact who is a certified mechanic performed a diagnostic test and retrieved DTC: P0747, indicating a failure with the pressure control cylinder in the transmission. The contact also found information on NHTSA Campaign Number: 24V797000 (Power Train); however, the VIN was not included. The vehicle was not repaired. The dealer was contacted and confirmed that the VIN was not included int the recall. The manufacturer was not informed of the failure. The failure mileage was 83,830.

- Newark, OH, USA

The contact owns a 2021 Chevrolet Silverado 1500. The vehicle was initially taken to the local dealer to be repaired under NHTSA Campaign Number: 24V797000 (Power Train). The contact stated the vehicle was not repaired. While driving 30-35 MPH, the rear-end locked up and caused the vehicle to enter the wrong lane. The contact stated that other vehicles were able to drive around the vehicle during the failure. The engine revved, and the RPMs revved too high. The driver was able to pull over safely. The check engine, traction control, parking brake, and maintenance warning lights were illuminated. The vehicle was towed to the local dealer, where it was diagnosed, and it was determined that the rear-end had locked up, and the #5 cylinder and wiring harness needed to be replaced. The mechanic was unable to unlock the rear-end. The vehicle was not repaired. The vehicle was taken to the local dealer on six other occasions for unknown issues. The manufacturer was contacted regarding a buyback. The failure mileage was approximately 34,958.

- Savannah, TN, USA

The truck started rattling and lost power while driving. Every warning light came on on the instrument panel. I was driving on the freeway in rush hour traffic when this happened. Yes, it has been confirmed by a dealership and independent service center. No lights were on prior to when it failed to give any warning that something may be going wrong. The failure occurred immediately after GM issued a recall in April involving defective V8 engines (Recall Link [XXX] )). While our truck is not currently included in the recall, the diagnosis of the vehicle is all the same as that of the recalled engines. We should not have an engine failing at 130K miles on a vehicle that has been well maintained. We are asking that this truck be added to the recall. We are still without the vehicle as engines cannot be sourced. Please advise on next steps. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Needville, TX, USA

In June 2025, I received a letter from General Motors noting that a defect exist relating to motor vehicles safety in certain 2021 model of Chevrolet Silverado equipped with the 6.2L V8 gas engine (RPOL87). The dealer has been unable to fix the issue in a timely manner as they claim that the parts are on backorder. Additionally, they have been unable to provide me with another vehicle while my car is in the dealer. It is completely unacceptable that the dealer has been unable to fix the issue in a timely manner or provide with alternative form of transportation while the parts arrive.

- Miami Gardens, FL, USA

Lifters 1-3-5-7 all failed. They were pitted as was the camshaft. Diagnosis from Hendrick Chevrolet in Hoover AL. 70k miles on one owner truck. Regular servicing and never towed anything.

- Albertville , AL, USA

check engine light came on at 55000 mile went to servige ststion they check oil 4 quart lowe motor leaking o il. been to dealer 5 time in last 2 0r 3 month. now engine making peaking noise at 6400 mile. dealer say warrenty out have to pay for repair. something wrong clinder head they guess dont now for shore will have to tare into motor this truck was under warrenty when i first took it for repairs now they want me to pay for the repairs.

- Paintsville, KY, USA

No updates have been made to fix recall. Status has been pending for a long and it-??s preventing me from selling the car due to fear of breaking down.

- Rancho Cucamonga, CA, USA

Around July 1st, 2025 I was hearing a ticking sound when taking off from a stop. On July 11th I had an oil change completed on the truck at the Local Chevy dealership, after the oil change, I mentioned the noise and was told maybe we could schedule some sort of deep cleaning of the internal components of the engine. After leaving the dealership after the oil change, I was still hearing the ticking sound. I then scheduled an appointment on July 22nd for the dealership to look into the ticking sound. I drove the truck to the dealership and it was working fine; other than the ticking sound when the RPM-??s were at 2200. At no time was there any warning lights that came on to alert me to a problem. After approximately 30 minutes of waiting in the customer waiting area, the service advisor came and got me and said -??we have big problems-?? and they were going to need the truck longer to look into it. I walked out to the service bay to get some personal items out of the truck. At that time, the mechanic pointed out some white looking fluffy cotton material and said that just came out the end of your exhaust. I had never seen that material prior to this appointment on July 22. The dealership called me July 24th and told me that the engine and exhaust system need to be replaced. They told me that the bottom end connecting rod came apart, and went through the engine and the exhaust system while it was at their facility on July 22. This truck has the 6.2L V8 (RPO L87) gas engine-??. This truck is a 2021 and there is 76,957 miles currently on it (7/24/2025). With a blown engine, and an exhaust system that needs to be replaced.

- Rapid City, SD, USA

Went to accelerate through an intersection and the engine seized up in the middle of the intersection. Complete loss and of engine propulsion. Had to be towed. Could have caused an accident. No warning signs. Truck was running great until it wasn-??t running at all.

- Madison, OH, USA

Purchased a 2021 Chevy Silverado in Dec 2020. At 4600 miles had first engine failure requiring lifters and tie rods to be replaced, bank 1/Cylinder 5. Looking back this repair was a bandaid for an engine (6.2L) with problems known to GMC. On May 3, 2025 @ 79,000 miles truck started making loud noises and all dash lights started flashing including engine lights while driving, dangerous because we were on a busy roadway. Pulled over to shoulder and had towed to dealership. Diagnosis was a crank bearing failure, scored cylinder, push rod bent and lifters were damaged. Engine is not repairable. Here we are just short of 3 months and still no truck, no ETA on replacement engine. Even though our Silverado is a 2021 it is not part of the current GMC recall because the engine was manufactured in 2020. We know that NHSTA is investigating 6.2L engines for years 2019 and 2020 and urge NHTSA to broaden the current recall. Our truck was our only vehicle and the expenses we have incurred through no fault of our own are a strain on our budget, we are retired and on a fixed income. This is our 2nd Complaint filing on our truck to provide NHSTA with additional information.

- Blanchard, ID, USA

P0016 camshaft position not plausible Service manager at Loftons Chevrolet in Henderson Tn states that truck needs a new motor but not covered under recall

- Henderson, TN, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 75 MPH, an abnormal boom sound was heard coming from the engine. The vehicle failed to accelerate as intended while depressing the accelerator pedal. The contact stated that the engine seized. The check engine warning light was illuminated. The vehicle was towed to the local dealer and was diagnosed with crank shaft sensor failure. The contact was later informed that the engine had failed and needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was contacted. The failure mileage was approximately 85,000.

- Charlotte, NC, USA

Losing power while driving and acceleration and uneven idle sometimes

- Quinlan, TX, USA

July, 10 2025 My 2021 chevy Silverado has stalled today in the middle of the road. When trying to start, it sounds like if it wants to turn over but it won-??t. I bought a brand new battery and problem is not resolved. I did some digging and sounds like fuel pump will not come on. This truck is only 4 years old and I should be having these issues. Please help thanks

- Liverpool, TX, USA