My 2021 Silverado with only 80,655 miles had to have the engine replaced. On 11/20/24, my vehicle indicated a P0303 code for miss-fire in cylinder 3. I took my vehicle to for repair to a local Chevy Dealership and was informed of the following: 1) Needed programming changes to the fuel injection based on service bulletin N242450631. This repair was completed by the dealer. 2) Needed a -??tear down-?? for further diagnostic. It was determined that the specific code could not be repaired and the entire engine needed to be replaced which was done at my cost. The details on service bulletin N242450631 are limited and do not describe issues that could be caused by the fuel injector problem. Relative to service bulletin N242450631 fuel injector issue, based on my experience with my vehicle, I believe this fuel injector programming bulletin issue caused the engine malfunction and subsequent need to replacement. Before the bulletin repair was completed, I know that my vehicle engine surged often. Looking back now, this constant surging had to be hard on the engine and likely caused the failure. Regardless, if it wasn-??t the service bulletin that caused the issue, a vehicle engine should last more than 80,000 miles. I believe GM needs to take responsibility for the engine failure which I believe was caused by faulty workmanship, design, computer engine programming, or some combination of these issues.

- Camden, TN, USA

Driving down the road and the vehicle shut off and said to restart. Wouldn't start back up. Check and found a 400 amp fuse was blown. Tested starter and was fine. Restarted the vehicle and it made a loud rattling noise and shut back off. Sent it to the dealer and they found that number 1 and 2 rods overheated and locked up the motor.

- Lockport, NY, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 50-55 MPH, the vehicle went into LIMP Mode. The vehicle decelerated to 35-40 MPH. The contact stated that the vehicle was consuming an excessive amount of oil. The contact stated that the vehicle was consuming a quart of oil per month. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed with a failed lifter. The vehicle was repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 92,000.

- Irwin, PA, USA

At start up check engine light, service esc, service parking brake. Code reader shows code P0304 misfire cylinder number 4.

- Warrensburg, MO, USA

Lifter failure on number 2 cylinder.

- Green Bay, VA, USA

Lifter failure at 8629 miles. All warning lights went on at time of incident, truck would barely drive home and I had it towed into the dealership where they replaced the entire bank of lifters. This is on my repair order- "Checked and found dead mis on cylinder 4 and ticking noise from engine//performed compression test and found no compression on cylinder 4//removed passenger side cylinder head and found lifter bad causing push rod to bend//replaced all lifters on right bank and 1 pushrod//changed oil and filter//filled coolant and test drove and found all ok. I called Chevy at time of incident (1/21/22) and opened case# 9-7252876703 stating I wanted both banks of lifters replaced because I pull a 30' camper with my family and didn't want the other side to fail while I'm pulling 7000+ pounds. They declined to replace the other bank stating that since the vehicle had more than 5000 miles it did not qualify for both sides to be replaced and it was for only vehicles after 11/21 and mine was built 2/21. I still would like to get the other bank of lifters replaced under warranty.

- Roselle, IL, USA

I have just been made aware that there is a lot going on right now with the l87 6.2 motor. I purchased my truck last September so I e had it almost a year 1/2. I recently started having what seems like a misfire issue as of 1/20/2025. I have it scheduled to be checked out Friday 1/24/2025. I-??m just reporting this to cover my back if any recall or anything comes about. In addition I-??ve had regular oil changes and maintenance on the truck. It-??s currently inspected and insured.

- Lancaster, PA, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving approximately 70 MPH and attempting to overtake a semi, the vehicle lost automotive power and stalled. The vehicle was later towed to the local dealer who diagnosed that the engine had seized and needed to be replaced. No further information was available. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 100,000.

- Mercer, MO, USA

2021 Chevy Silverado RST 6.2 Crankshaft Failure -?" Trust bearing / Main Bearing -?" Verified by GM dealership. This incident occurred without any prior warning indicators. The check engine light illuminated only after the engine began to seize, and the engine abruptly stalled. At the time of the failure, the vehicle was traveling at 60 MPH on a busy highway. Upon the event, the vehicle came to an immediate stop and could not be restarted. The engine failed to turn over, rendering the vehicle inoperable and partially obstructing traffic. The vehicle was subsequently towed to a local General Motors dealership, where it was determined that the failure was due to a crankshaft thrust and main bearing issue. The vehicle has 27,000 miles on the odometer.

- Green Cove Springs , FL, USA

Started my truck and the check engine light was flashing along with a few other warming lamp lit up. When I went to drive the truck the engine started to make some noise, and didn't have much power. After being diagnosed by the dealer ship the motor needed new valves, lifters and camshaft. The bill for the repairs is going to be around $8,500 and GM is not willing to help with the costs.

- Medina, NY, USA

Total catastrophic engine failure. Occurred at roughly 80,000 miles. Engine bearing shattered causing total engine loss. Needed to be replaced. Occurred in May 2023. There were no precursors to the event and the engine had been well maintained. I noticed an investigation of my vehicles engine and thought I should report this.

- Bozeman, MT, USA

Major engine failure / main bearing failure with the engine burning oil and no warning signs no oil leaks or no burning oil smoke out of exhaust. I-??m in the process of having the engine re built out of pocket on this date 1/19/2025 and have no documentation from repair shop at this time so I can-??t up load any further information till I get it completed,

- Houston , TX, USA

I was driving 65mph down the freeway when the truck suddenly turned off and the dash told me to put in neutral and start again so I did just that. Made it about another mile and the truck completely turned off and wouldn-??t turn back on there was nowhere to pull over or get off the freeway in that time frame so I was stopped in the middle of the highway with my family in the truck. Luckily a guy in another truck was able to push me over to the shoulder with his vehicle where I sat and waited four hours for a tow to the dealership. Two days later they called me and told me it-??s spun a bearing and threw two rods and needed a new engine. I-??m anal about servicing my vehicles they told me it just happens, but it was a brand new truck with only 35k miles. Ever since I got the new engine installed it-??s constantly squeaking and they can-??t seem to pin point the issues I feel like it-??s going to happen again and this next time I-??ll probably be out of warranty and it-??ll be out of pocket for me to fix.

- Phoenix , AZ, USA

The crankshaft bearings failed causing engine to knock very loudly. I didn't get an engine light. Dealership did replace one bearing and said lifters we fault and replaced. This happened with just over 33000 miles on truck. I didn't receive any extended warranty from manufacturers for any problems that may occur in future from pieces of metal or other contamination to inside of engine.

- Camden , TN, USA

Engine lifter failure at 75 k miles

- Houston, TX, USA

Engine stopped working while driving on major highway. Coasted to stop on shoulder. Truck was towed to nearest Chevy dealer, Parkway Chevy, Tomball, TX ([XXX]). Diagnosed bearings failed, camshaft froze and engine valve damaged. After rude treatment by service agent and service manager, towed truck to original dealer in Conroe, TX-- Buckalew Chev/Keating Chev (Nov. 25, 2024). They confirmed problem and truck has been sitting at their dealership since Nov. 25, 2024 waiting for re-mfgd engine. No timeline given for replacement. Bought another truck (Toyota Tundra -- [XXX]). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Spring, TX, USA

While driving down a major, extremely dangerous highway [XXX] in Pasco County, FL) my truck randomly shut off (with zero warning, no check engine lights, nothing) Thankfully, i was already in the right hand lane and managed to coast into a gas station. At 60, 375 miles on my 2021 truck I was 352 miles outside of the powertrain warranty, so I had my truck towed to the closest chevy dealership to see if they would good-will the warranty. They (Chevy) reported to me that there was a rod-knock with an estimate of $17,203.52 to rebuild the motor. I would also have to pay approximately $2000 (10 hrs of labor) for tear down of motor to even see if GM would POSSIBLY pay out anything on warranty. I am the only owner of this truck since day 1. I have every oil change record that was done as specified by the manufacturer. I have no means of transportation at this time. My truck is available for inspection. I am also unable to take out any other vehicle loans while I am forced to pay for a truck that now, has no motor. Also, I went in for a recall of a software update for the forward collision system. Previous to the dealerships update, the system was working fine. After the update, the collision system no longer works. This is greatly affecting my ability to work, and function as a member of society. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Holiday, FL, USA

Vehicle has less than 35k miles. Vehicle started and operated normally Attempted to turn onto main thoroughfare from a stop. While still in drive, vehicle engine rev-??d up but transmission did not engage. Attempted to cycle through gear selector with same result. Reverse is the only gear that allowed vehicle movement. Serious safety concern if this were to happen while traveling at any significant speed or if trying to merge or cross heavy traffic. Vehicle has not had an official diagnosis, but I believe this is a transmission valve body problem known to the manufacturer. There was no indication prior to this event of any mechanical or electrical problems with the vehicle. This issue could easily get someone killed.

- Isabela, PR, USA

I bought my 2021 chevy silverado 1500 Lt crewcab in march 2021 it had 5000 miles on it I had it for 2 weeks when it started shaking and the engine light was flashing. Took it in to auto nation cheverolet and they had it for a month. when I got it back and started the vehicle the engine light was still flashing. They had to change the lifters on Bank 1 because number 8 cylinder lifter was bad. why didn't they change all the lifters. 3 years later I am having the same issues getting a misfire on number 4 cylinder truck shaking and white smoke coming out of the exhaust. Also the dash lights up with service parking break and service esc when the engine light flashed. ofcourse my warranty is exceeded and GM knows about this problem with the 5.3 and 6.2 engines and won't issue a recall. it is a big saftey issue as your vehile looses power or shuts off. this shou;dn't be happening especially when your vehicle is fairly new. this is twice now this is happened in 3 years and now I have to pay out of pocket to get this fixed because gm won't issue a recall on this known problem that is happening to thousands of customers.

- Rosamond, CA, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the vehicle jerked with the oil pressure gauge fluctuating. No warning light was illuminated. The contact pulled over and upon inspection, the contact discovered that the engine oil was extremely low. The contact added six quarts of oil to the engine. The vehicle was taken to the dealer, but the cause of the failure could not be determined. The contact stated that the engine was consuming an excessive amount of engine oil, and that six quarts of oil was added every 5,000 miles. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 56,400.

- Gobles, MI, USA