2021 Chevrolet Silverado 1500

See attached document for complaint.

The truck shut down while on the highway, complete loss of power and would not restart. Chevrolet dealership concluded that the engine has locked up/failed. Chevrolet states that 2021 6.2-L L87 engine is not included in Recall 25V-274 despite similar mechanical failure.

internal engine failure: Lifter went out. Hence caused a catalytic converter to fail without my knowledge. Obviously with this issue there is an issue and can potentially be more. This would be under a recall.

Took my truck 2021 Chevy Silverado 1500 6.2 to GMC for engine noise and was told my engine needs to be tore down to replace the camshaft and lifters for $11,000 or I could replace the engine for around the same cost. Truck doesn’t fall under the 6.2 recall even though this is one of the issues that the motor has been recalled for?

The lifter on my cylinder one is failing. This is a known issue with the Chevrolet 5.3L 8cylinder engine and 2021 models are known for being notoriously bad with lifter issues. My safety and the safety of other drivers that own 2021 Chevrolet models is impacted due to this issue can cause the engine to completely fail and shut off while driving which could cause severe injuries up to death. The problem is a widespread issue and mine was confirmed by an independent service mechanic. The vehicle is now being inspected by the dealership. The issue did not arise until I reached 104,000 miles.

I bought this vehicle 9/2023. On 02/23/2024, I started my truck, and heard a very loud knocking noise upon starting it. I turned it off. Called the dealership to come pick it up. They were able to repair it, by repairing some of the lifters on one side. Fast forward to 10/25/2026, I started my truck and heard the same knocking noise. Called the dealership to come pick it up. They say my truck is no longer covered under the power train warranty, and it will cost $10,000 to replace the other side of lifters and cam shaft.

On October 18, 2026, I was driving my 2021 Chevrolet Silverado 1500 with the 5.3L V8 engine at highway speeds with my wife and two young daughters in the vehicle when the engine suddenly lost power and the truck began shaking violently. The check engine light flashed, and "Service ESC" and "Service Parking Brake" warnings appeared on the dashboard. The sudden loss of power at highway speeds created a serious safety risk to my family and surrounding motorists. I was able to get the vehicle off the highway safely. Restarting the truck did not resolve the issue, and it was no longer drivable. The truck was towed by a AAA contractor to a Chevrolet dealership. Following inspection, the dealership verbally diagnosed a broken camshaft and advised that the entire engine required replacement. The truck had approximately 98,000 miles at the time. A written diagnosis has been requested, and the vehicle is currently at the dealership. The truck has a documented history of engine problems. In July 2023, at approximately 33,500 miles, a Chevrolet dealership diagnosed code P0300 and documented misfires on cylinders 1, 3, and 7. Warranty diagnostic and repair work was performed. Another check engine light concern was documented in November 2024 at approximately 62,300 miles. In April 2025, at approximately 69,600 miles, Chevrolet again investigated a P0300 multiple-cylinder misfire condition. Beginning around 75,000 miles, the truck also began displaying recurring low-oil warnings. I added oil whenever these warnings appeared and maintained regular oil changes, supported by service records. Despite these prior engine concerns and dealership visits, the engine suffered a catastrophic failure without an immediate warning before reaching 100,000 miles. I am concerned about the potential for sudden engine failure and loss of propulsion at highway speeds and believe this warrants a safety investigation.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving the vehicle at highway speeds, the vehicle shut off and lost power. The vehicle failed to accelerate and coasted off the interstate to a safe stop. The contact stated that several warning lights were illuminated on the instrument panel while the vehicle was losing power. The contact stated that two days prior to the failure, the vehicle was taken to an independent mechanic for an oil change, and there was no failure found. The manufacturer was notified of the failure. The vehicle was towed to the dealer where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The failure mileage was 79,000.