Verified customers cpncern of cylinder 3 misfire and low compression. Inspected cylinder 3 sing a borescope and found excessive oil on top of the piston and on the cylinder walls. There are marks from loose carbon debris damaged the cylinder wall. Upon further inspection the oil looks to be coming from the valve seals. Recommend replacement of the long block assembly to correct these conditions. --Cody Glasscock, Ford Lincoln of Morgantown
2021 Chevrolet Silverado 1500 engine complaints
Page 4 of 16: complaints 71 to 100 of 453, newest first, as owners wrote them.
It started backfiring and knocking
Check engine light flashes when pulling a load and accelerating above 50mph. Check engine light code is PO300 Random multiple misfires. Took it to the shop and there we’re currently no active misfires.
The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 70 MPH, the vehicle unexpectedly decelerated to 30 MPH and the vehicle loss motive power. A dealer was contacted. An undisclosed warning light was illuminated. The vehicle was taken to a dealer to be diagnosed, and it was determined that the engine needed to be replaced, and that the engine was consuming an excessive amount of engine oil. The contact was informed that the warranty would not cover the repair. The vehicle was not repaired. The failure had occurred on several occasions. The contact associated the failure with the federal safety agency Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING); however, the VIN was not included in the recall. The manufacturer was notified of the failure and informed the contact that the VIN was not under recall. The manufacturer referred the contact to the federal safety agency Hotline to report the failure. The approximate failure mileage was 109,082.
I have 112,000 miles on my truck and my 6.2l motor is going out or knocking. I am very unhappy that my truck is not covered under the recall and I would like to understand why it is not since this is the issue of the recall. I would like to clarification on this and what options I have since it is going to cost me 14k to replace the motor. Case #101943027
Lights on the panel reads service parking break, engine, transmission, abs, traffic control and esc service. All these lights are on. Idling rough, white smoke with rich smell. Had a diagnostic read cam/crank and lifters bad… estimated cost 15,000. Total new engine install.
I bought a 2021 Chevy Silverado 1500 Badlander edition in February of 2025. I love the truck and drive it everywhere. I have brought it in for every oil change when needed. I got my first oil change April of 2025 and had no issues. Then I got my second oil change June of 2025 and both of these were done at the dealership that I purchased the truck from. At the June oil change I asked Jeff Belzers to do an oil consumption test and they said they would not because my vin did not show up in the recall. On July 31 of 2025 I got an engine oil low light on my dash, which I took a picture of. At that time I had to add two quarts of oil. Then in August of 2025 I went in for my oil change at Jeff Belzers again and I told them about adding the two quarts of oil and asked again at that time if they could do an oil consumption test and they told me no again because my vin was not on the recall list. I then got another low engine oil light on September 29, 2025 and at that time I added 2 quarts of oil. In October of 2025 I brought my truck to Maur Chevrolet for an oil change and asked them to check my vin for a recall and they said there were no recalls. Then I brought my truck to Maur Chevrolet in November of 2025 for an oil change and I asked if the vin recall had changed and they said no. At this time I was just checking my oil and adding as needed. I took my truck in for an oil change in January of 2026 and asked about the recall again and no changes. Then after that oil change, I was adding a quart of oil every 600 miles. So when I went in for an oil change in April, I asked for an oil consumption test to be done and the service advisor said yes. This was the first positive step I had in this entire ordeal. At the end of the consumption test, which was on June 12, 2026 it was verified that the engine was burning 3 1/2 quarts of oil every 3,000 miles. At that time I had another oil change done and they told me that they would discuss what would happen on Monday June 15, 2026
The truck started backfiring and shuddering. Took it to the mechanic and with only 112000 miles I am being told it needs a new engine. It is the 6.2l motor.
Loud ticking noise and power loss. Transmission shift slips from 2nd to 3rd . Called factory and dealership for check up. Said no problem… Told to Change oil. Did this, NO CHANGE.
On June 3, 2026, my 2021 Chevrolet Silverado 1500 LT Trail Boss, which has a 6.2L L87 V8 engine, stalled and shut off unexpectedly while I was stopped at a traffic light on a public highway. The engine died without warning, leaving me stranded in traffic and creating a serious safety risk for me and other drivers because of the chance of a collision. I had to call the police to come and sit behind me to keep myself safe from a collision while I waited for a tow truck. A dealer diagnosed the vehicle with DTC P0016, indicating a crankshaft/camshaft position correlation fault. This points to either an engine timing problem or an internal engine failure. The dealer confirmed the issue and gave me a repair estimate of about $11,000. Both the vehicle and repair records can be inspected if needed. Before the failure, the vehicle showed signs of an engine timing or internal issue and eventually triggered the check engine light with code P0016. After researching, I discovered many reports from other owners with the same 6.2L L87 engine who faced similar problems, including P0016 faults, engine stalling, internal engine damage, and complete engine replacement. While some vehicles with this engine have been part of recalls or special coverage programs, my vehicle is not included, even though it shows the same failure pattern. At the time of the failure, the vehicle has about 140,336 miles. I believe my vehicle has the same defect affecting other 6.2L L87 engines. I ask that the federal safety agency look into whether more vehicles should be added to any current or future recalls or defect investigations. Thank you for your attention to this matter.
When i first purchased the vehicle off the lot a few years back (its a 21, so probably in 22?) Brand new off the lot minimal miles. Within the first few months we started having issues with the power wanting to shift down. We took it in, the dealership found nothing wrong with it and cleared the codes. This happened a few more times. The last 2 times I took it in. They mentioned that there were recalls on it and could possibly be causing the issue. Took care of that (last august- have docs. to prove it as along with what they did and what we stated). Fast forward now 2 months ago (April of 25) and it starts acting up again and wants to downshift, shifting hard, stuttering and not wanting to drive, the same things we have been complaining about since beginning with lights on etc. However, this time we tried to shut it off and give some down time to get back home. After about 10 mins, we went to start the truck to get it home, and it would not start. We had it towed to the dealership. Once they got it, after 2 weeks of waiting we were finally presented with, the starter went out and the wiring box needed to be replaced (this has to be done before they can look into the original problem again) (because without those 2 things fixed, they wont be able to do) it is now June. I took the vehicle home, due to not having funds to fix right away. After doing some research and some digging, it would appear that the issues that we are having with the truck are issues that are already being recalled on this specific truck and model. However, for mine it is not, because I have the 2.7 l turbo and not the 6.8. THere have been numerous complaints about the known issue.(which i found out is the other wiring by the engine that is being chafed which is causing the wires to break and causing the other box and alternator to go and be replaced). If you replace it fries all again. Why is the 2.6 engine problem thats reported not recalled but rest is and it is known. I also see this online
Loud ticking noise and power loss. Transmission shift slips from 2ed to 3rd .Recall to factory for check up. Said no problem? Changed oil. They say it was good. It is not.
Was on way to trade truck in onb6/6/26 and got a cylinder #7 misfire. Replaced spark plug and wire and moved coil packs around to trace and stayed on #7. Just had recall completed on 9/25/25 and stated that I've heard a rattling noise in engine area. They performed recall and changed to new oil suggested by GM. Dealership said noise was transmission. I told them that was replaced already within last 50k miles under warranty. Drive it for a few days and rattling noise still there. Took back to dealer on 9/30/25 at cost of $200 diagnositc and stated there is a grinding noise under light acceleration like it's metal on metal. Dealer stated that it was the rear seat rattling. There were NO noises in the cab, only coming from outside at driverside motor area. Called GM 10/1/25 to let them know the denial of motor replacement and we wanted 2nd opinion but we would have to pay out of pocket again. On 6/4/26 had to have truck towed to new dealer. New dealer won't make deal on new truck because of this and we have 2 trips already booked and paid for and 1 at end of June. New dealer is putting in service on 6/8/26 to verify cause. I have called GM after making repairs and they said it was between me and the dealer, there is nothing they can do. This is unacceptable! Im fine if they would offset cost and buy a new Chevy truck and we are going to fight to get it made right. This does make us want to change brands even though we've bought 5 Chevys in the last 10 years.
I have fighting this issue since January and have not gotten any help or relief from Chevrolet. This issue caused a significant safety risk and has cost me $12,000. I am writing to formally report a serious safety issue involving my 2021 Chevrolet Silverado that resulted in a sudden loss of power while merging onto an interstate highway. On XXX, I brought my vehicle in for service to replace the upper and lower ball joints, as well as the control arms. I retrieved the vehicle from the repair shop on XXX, and departed the same day for travel to [XXX]. Later that evening, while traveling southbound on [XXX] near [XXX], I stopped at Exit XXX. Upon re-entering the highway and accelerating to merge into traffic, the vehicle began shifting through gears abnormally. While in approximately 6th gear at around 2,900 RPM, a loud banging noise occurred, followed immediately by a significant loss of engine power. At the same time, the check engine light illuminated. Due to the sudden and unexpected loss of power while actively merging into highway traffic, I was nearly rear-ended by another vehicle. I was forced to take immediate evasive action and pull onto the shoulder to avoid a collision. This incident created a highly dangerous situation not only for myself but for surrounding motorists. This failure occurred without warning and directly impacted my ability to safely operate the vehicle in a high-speed traffic environment. I believe this presents a significant safety concern that warrants investigation. Please let me know if any additional information is required. I appreciate your attention to this matter and request that this incident be formally documented and reviewed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Truck started ticking/clicking a few months back and the ESC or ECS light came on took it to the dealer Carl Black Chevrolet in Orlando, where the was supposed to to fix the problem under the previous owner, my boss who gave me the truck and 30 days after receiving the title the motor is bad. Mileage now is 112,000, the truck has burned the right fuel and had proper oil changes. Now the motor is blown as per a certified mechanic northeast auto and truck service in Ocala. First owner called General Motors to see if they could help and was told it should have gone to a Chevy dealer so they won’t or cant help. Motor is blown on a truck with low miles and this is how Chevy appreciate its drivers who purchase their vechiles. Buy American, they say…wow! On [XXX] the same reading came on again. This time it said service emergency brakes, parked it, went in store to purchase food, came out, started truck, drove 4 miles, parked truck went in to work and three hour later came out and white smoke rolled out the back and inside cab. What the heck! Embarrassing … had to leave truck… Chevy replace this engine, please. Was concerned about it INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I have a 2021 Silverado LT trailboss. Catastrophic engine failure. Camshaft bearing and lifter failure. First lifter replacement @ 16,000 miles. Second at 104,000 miles. Was told by GM the 6.2L L87 I have is not affected due to a Canadian VIN. The sticker on the truck says Assembled in Kentucky. Gm charged $18,000 for a refurbished motor. The “new” motor had lifter failure at 12,000 miles. Canada is now included in the recall but I was again told by GM that my engine is not affected due to being built in September 2020. I believe this engine bearing failure goes back further than they like to admit.
I was driving and all of a sudden engine and transmission failed many lights appeared on the dashboard brakes were not braking, the truck started to lose power and making weird noises.
The engine was burning oil, so did a consumption test. The dealer took apart the engine and found the rings for the pistons were leaking and scaring was resulting. This caused me to buy part of a new engine because it was 6days past warranty with only 44,000mi on it. Also, at 18,000mi, a lifter bent and needed that replaced. There are numerous reports for this engine. It should be recalled! I shouldn't have to pay out of pocket for the defaulted error proned engine.
The contact owns a 2021 Chevrolet Silverado. The contact stated that while driving at various speeds, a flashing check engine warning light appeared on the instrument panel. The vehicle was taken to a dealer where the received fault code PO300 which was a general code for a misfire in the engine. The contact brought the vehicle back to the dealer multiple times due to various fault codes; however, the contact was given the same information. The contact then received a "Low Oil, Check Oil", the contact checked the oil and discovered no oil on the engine's dipstick. Due to the failure, the vehicle was towed back to the dealer where they began an oil consumption test. The valves collapsed and the dealer replaced the valve in cylinders 1,3,5, and 7 as well as the spark plugs. Despite the repair, the contact stated that the failure returned almost two months later. The contact continued the oil consumption test and stated that the vehicle was losing 3 quarts of oil each oil change. The manufacturer had been notified of the failure on multiple occasions and had made multiple vehicle buyback requested; the manufacturer denied each buyback request. After his latest phone call with the manufacturer, he was referred to the federal safety agency Hotline to file a complaint. The vehicle was not repaired. The failure mileage was 12,000.
The contact owns a 2021 Chevrolet Silverado1500. The contact stated while driving the vehicle he felt shuttering and noticed his automatic start does not start. The contact also experienced engine reduced power issues, preceded by a warning sign on the dashboard stating "Engine Power is Reduced" while driving. Additionally, the contact noticed a significant loss of mileage per gallon and a loss of oil. The contact noticed a check engine light on, which had codes that had a crankshaft and cam shaft sensors that are not operating properly, which the vehicle cannot be inspected due to the failure. The vehicle was taken to a dealer where it was diagnosed to need a new timing chain to control on the cams and crankshaft. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 110,000.
While driving on the freeway, the truck suddenly displayed a flashing check engine light along with multiple warning/error messages. I was able to limp the vehicle to the nearest mechanic, where they inspected it and confirmed catastrophic internal engine failure. Upon removing the oil pan, they found large copper-colored metal chunks and metallic glitter throughout the engine oil, indicating severe internal bearing/component failure. The vehicle is no longer safe to operate and now requires major engine repair or replacement.
The contact owns a 2021 Chevrolet Silverado. stated that while driving on several occasions at various speeds, the vehicle lost power and did not accelerate as intended. The check engine warning light illuminated. The vehicle was taken to a dealer but was not diagnosed. The vehicle was then taken to an independent mechanic where it was diagnosed that the coolant control valve needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 115,000.
On 4/27/26, my family and I were traveling south on Colorado C470 at 8 AM. Our 2021 Chevy Silverado 1500 had catastrophic engine failure at highway speed as we were passing an 18 wheeler. The failure caused the vehicle to lose power and engine, and the display said to put the truck in Neutral and restart the engine. After coasting to the shoulder, the engine would not restart. We were stranded on the highway during rush hour for an hour and 1/2 waiting for a tow truck. This scenario is identical to the safety risks outlined in the federal safety agency Recall 25V274 (and investigation PE 24-007). This failure resulted in the intake manifold being physically displaced and damage to the timing assembly. The dealership is attempting to deny coverage by claiming the "upper gallery" damage (timing/intake) is unrelated to the "lower end" issues covered under the special coverage/recall [ this is a Dealer Quote]. This logic is technically flawed: Consequential Damage: A catastrophic lower-end failure (e.g., a broken connecting rod or seized crankshaft bearing) at 80 mph creates the massive internal pressure required to shatter or "blow off" a plastic intake manifold. Timing Linkage: The timing chain is physically connected to the crankshaft. It is mechanically impossible to have a catastrophic crankshaft failure at high RPMs without causing secondary damage to the timing gears and "upper gallery". Recall Precedence: My vehicle exhibits the exact failure mode—loss of motive power due to bearing failure—currently being investigated by the federal safety agency for 2019-2024 L87 engines.
Lifter failure at 50,100 miles- just out of powertrain warrant by 136 days. Failure occured on freeway. After hearing metallic sound service brake system light, traction control and service engine light came on. This occured 5/3/26.
Valve Cover leak, Known Issue by GM, TSB 22-NA-027, refusing to warranty known problems & charge the customer $4,000 in repairs.
While operating my vehicle under normal driving conditions, I experienced a sudden and complete loss of engine power without warning. The engine shut off abruptly in active traffic, creating an immediate safety hazard and increasing the risk of a collision for myself and surrounding motorists. Following the stall, the vehicle would not restart. The engine cranks but does not start (a “dry crank” condition). There were no prior warnings, indicators, or drivability issues suggesting an impending failure. This vehicle is equipped with the L87 6.2L V8 engine, which is subject to a known recall involving internal engine defects that may result in sudden failure. The symptoms and failure mode observed are consistent with reported cases of internal engine damage, including potential bearing or rotating assembly failure. At the direction of GM and the dealership, the vehicle was previously brought in for recall inspection. The recall was subsequently marked as completed. However, I am now being advised that the recall cannot be reopened and that I am responsible for the repair costs. A completed recall inspection does not eliminate manufacturer responsibility when the underlying defect later results in failure. I understand there is an ongoing and recently reopened the federal safety agency investigation into GM’s “Pico test” inspection process, as multiple engines have reportedly failed after passing this procedure. Given that this failure occurred after the recall inspection was completed, this incident raises concerns regarding the adequacy and effectiveness of the prescribed remedy. This event represents a serious safety issue due to the sudden loss of power in traffic without warning. I am submitting this complaint to document the failure and to request further review of the recall remedy and associated inspection process.
I completed the N252494003 recall inspection on my 2021 Chevy Silverado 1500 6.2L at Carl Black Buick/Chevy/GMC in Roswell, GA. They said my crankshaft was not one of the vehicles affected and sent me on my way with my free oil change as a remedy to the issue. I subsequently used that information, thinking the “bottom assembly” of my motor was good and not impaired, and proceeded to have the DOD/DFM deleted from the motor because it was a known fail point and this work cost me $7,000. Maybe 6 months after my inspection for the recall, I begin to hear a noise and I take it to the same dealership for service and they tell me the crankshaft is faulty. Nothing about the DOD/DFM delete and subsequent ECM tune had any impact on the crankshaft and yet, the dealership is denying fault when it was there service department hid the truth of the engine during the inspection. The warranty for the crankshaft is no longer applicable because of the modifications I did, but had they been honest about the faulty crankshaft, I would’ve never done that work to it in the first place. The engine should’ve been flagged during inspection and replaced.
For the second time in my 2021 Chevrolet Silverado with a 5.3-liter engine, I've had GM lifter failure. It's directly related to the Active Fuel Management System (AFM), and was confirmed by my Chevrolet dealer's mechanic and service writer, Burdick Chevrolet in Cicero, New York, on both occasions. They've had to perform a multi-thousand-dollar lifter replacement service job. They've told me that GM is aware of the safety issues, but won't do anything about them. It also happened to me with my 2014 Chevrolet Silverado, but I was lucky that time. It was fixed with new spark plugs and wires. It's cost me thousands of dollars for repairs each time. But that's not why I'm reporting this to the federal safety agency. The issue is safety. When the lifters fail, you get no warning. The truck rattles and rumbles. It becomes unstable on the road, and sometimes wobbles as if it's about to go out of control. The problem causes the loss of electronic stability control (ESC) and renders the electronic parking brake useless. Lifter failure can also cause the engine to stall while driving, especially at a stoplight. This happened to me. I had to press the gas pedal gently to keep the engine running at a stop light just to get off the road. On the highway, when the lifters fail, the truck slows to a point where it cannot keep up with traffic. That presents a dangerous situation. It's not safe. GM knows about it, but as far as I understand, the company has done nothing to fix the safety problem. Internet forums are full of comments about the problem, the safety issues, and the enormous cost of repairs. Surely your agency can compel GM to fix the lifter failure problem before someone suffers a major accident due to an uncontrollable vehicle. I'll never buy another vehicle with AFM. Many people are unaware of the dangers involved with this system. GM should get rid of it. [XXX] Skaneateles, [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Truck is equipped with a 6.2 engine. It is a 2021 with less than 100k miles on it. Dealership is stating engine failed for no reason. Dealership confirmed engine failure this past week of April 2026. This is a known issue and my vehicle is not under the recall. Truck stalled out of no where. There was no warning before it did it.
right bank collapsed lifter. this is the 3rd time in 5 years this has happened same side same lifter. loss of power engine shakes the whole truck. Also electronic emergency brake won't release automatically and engages when driving. This has happened when I first bought the truck in Mar 2021, again in nov 2024 and currently at antelope valley Chevrolet on Mar 20 2026 for the same thing.
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