general problems of the 2021 Chevrolet Silverado 1500 - part 2

Cel on. Lifter failure on cylinder 1.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that after the vehicle was stopped at a traffic light or stop sign, while attempting to accelerate, the vehicle briefly lost motive power before slamming into gear. The check engine warning light was illuminated. The contact stated that the failure had gotten worse. The vehicle was taken to the dealer; however, no cause for the failure was found. The contact stated that the failure persisted. The vehicle was taken to several dealers; however, no cause for the failure was found. The manufacturer was not notified of the failure. The failure mileage was approximately 140,000.

Component that failed: the valve train system failed due to collapsed lifters in the gm 5. 3l l84 engine. The lifter failure caused internal camshaft damage requiring major repair. The failed components were removed by the Chevrolet dealership and should be available through the repair facility if inspection is requested. Safety risk: the engine failure caused a sudden and severe loss of power while driving. The vehicle would not accelerate beyond approximately 45 mph on a 65 mph roadway while en route to the dealership, creating an unsafe speed differential. When attempting to accelerate to pass another vehicle on a two lane road, the engine backfired and immediately throttled back, making it unsafe to complete the pass. The check engine light illuminated at the exact moment the vehicle lost power during the passing attempt. This sudden propulsion loss during an active maneuver created a hazardous driving condition. Dealer confirmation: an authorized Chevrolet dealership diagnosed collapsed lifters which damaged the camshaft and confirmed this as a known failure pattern in gm l84 engines. Inspection by others: vehicle was inspected and repaired by the dealership. No accident occurred, so no police or insurance inspection was involved. Warnings or symptoms: no prior warning lights appeared before the passing event. The check engine light came on during the failure while accelerating. Additional context: this failure aligns with widely documented lifter collapse defects in gm 5. 3l l84 truck engines. The breakdown was not caused by maintenance or wear and tear but by premature internal component failure known across this engine platform.

The contact owns a 2021 Chevrolet Silverado 1500. The contact was aware that the VIN was included in NHTSA campaign number: 24v797000 (power train). The contact stated that while driving 75 mph, the vehicle failed to accelerate as intended while depressing the accelerator pedal, and the vehicle pulsated before stalling. The contact was able to coast to the side of the roadway. No warning lights were illuminated. The vehicle was towed to an unknown dealer, where it was diagnosed with transmission failure. The vehicle was not repaired. The vehicle was then towed to another dealer, where the transmission failure was confirmed. The contact stated that the dealer had not inspected the transmission and used a "peephole" to inspect the transmission. The vehicle remained at the dealer unrepaired. The manufacturer was not notified of the failure. The failure mileage was approximately 100,000.

1- tailgate keeps opening by itself. It has opened while driving down the highway and things fell out of back of my truck almost causing an accident. It has opened while sitting in my driveway after I have turned the truck off and gone inside. I have reported this to a dealer they said my VIN is not on the recall list. I would like my VIN added since it is obviously an issue with the silverado's. 2- I recently has to bring my truck to the dealer for the transfer case sounding like there were bolts in a blended and a pinging sound by the bell housing while in park. They stated it was the front axle and fixed it saying it was a power train thing. The noise is back and now out of warranty.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The contact stated that since the purchase of the vehicle, the transmission had failed three times. The transmission had been replaced three times in the past. The second time the transmission failed at approximately 40,000 miles. The contact related the most recent failure of the check engine warning light to the fuel pump driver control module. The manufacturer was not made aware of the failure. The failure mileage was approximately 169,800.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 20 mph, the vehicle lunged forward while the accelerator pedal was depressed after the brake pedal was depressed. While the contact’s husband was driving approximately 78 mph and attempting to accelerate, the transmission light drive(d) started flashing, and the transmission unexpectedly shifted to neutral(n). The driver was able to coast to the side of the road, depress the brake pedal, and wait for a while before continuing to drive. The vehicle was taken to the dealer to be diagnosed; however, there was no cause for the transmission failure found. The vehicle was repaired. The manufacturer was informed of the failure, and a case was opened. The manufacturer referred the contact to the NHTSA hotline to report the failure. The failure mileage was 63,000.

Not sure of exact date I believe it was right before thanksgiving. The truck started shuttering and vibrating. It feels like we are driving on a gravel road. The manual said to change transmission fluid between 45,000 and 60,000 so we took it to the dealer. That is what we did hoping that would fix the problem. But it did not so we took it back and they kept it for 3 weeks they said no codes came up and they said the tires needed balancing so we let them do that but the problem is still there. They say there is no recall on it . We did some research and found information stating chevy is having problems with the transmission. As of now we only have 45,608 miles on it. It is riding worse now.

I was stopped at a stop light and all of a sudden, the engine just revved amd revved and no drive only reverse, and it happened 4 times until tonight, 11/11/25 @ 8:38pm I am stuck at another red light and have to back my truck up to home depot and get a tow. Only a 5 year old truck with 71122 miles and always well maintained with papers and goes out on me. Not acceptable gm! you make things and used to be solid, like a rock trucks but now I feel robbed as a long time chevy fan/enthusiast but I may have to change manufacturers unfortunately.

The contact owns a 2021 Chevrolet Silverado 1500. The contact received notification of NHTSA campaign number: 24v797000 (power train), and the vehicle was taken to the dealer for the recall repair. The dealer informed the contact that the recall repair had been performed; however, the recall remained marked as incomplete. The dealer was contacted and confirmed that the recall service report had been sent to the manufacturer. The manufacturer was contacted and confirmed that the recall service report had been received; however, the manufacturer advised that the recall could not be marked as complete. The manufacturer did not provide further information. The contact expressed doubts that the recall repair was completed effectively. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.

I experienced a locking up or no power to the rear wheels. It was raining and the rear wheels would spin. I had no traction. I had to take a few turns and had to be careful or I would have fishtailed into other vehicles. When I stopped at a stop light/or sign then proceeded forward the rear wheels would spin in place. The tires wouldn't grab the pavement. This is the best way I could explain it.

My transmission started to make a rumbling sound intermittently while I was on the highway. It happened during normal highway speed and not dependent on acceleration or deceleration. I brought it to the dealership with 84,000 miles and they dropped the transmission pan. No metal found in the fluid. The issue was with the torque converter. I had my oil changed 1. 5 weeks prior with a 21 point inspection. I was curious if there was a TSB for this issue. I haven't been able to find a recall notice for this issue.

While driving the engine shut off without any warning lights which could have caused a serious accident causing bodily harm or property damages as I was unaware of the issue and was going 50mph at the time - this occurred on 10/23 I noticed a ticking and brought the vehicle to the dealer for inspection on 10/20, at the time of this inspection the technician said that they could not replicate the sound and I explained that this was happening at 3000 rpm. The technician said that I would need to bring the vehicle back and they would need to start to take apart my engine piece by piece and I said the ticking is part of the known lifter problem and the technician shrugged his shoulders offering no other options. That same day I took my vehicle to another independent shop and he confirmed the ticking is a known issue that occurs prior to the lifter collapsing. After the vehicle shut itself off, and I was able to restart the vehicle, many warning lights appeared on my dash, there were none there before, one of the codes that was flashing was esc and the vehicle began to lurch and downshift. I called my mechanic who said the code was to do with the electronic stability control system but I should be okay to drive until I could get to him for him to look at the codes. On 10/24 I took the vehicle to the mechanic and another code was for cylinder 3 misfire which he stated could be the collapse of the lifter and the codes will not clear. The vehicle now downshifts without warning, there is an engine knocking that is occurring and the vehicle is not safe to drive as the engine may seize at any moment.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 55-65 mph, the vehicle shuddered while the rpm was fluctuating. There was no warning light illuminated. The dealer was notified of the failure and informed the contact that the VIN was not included in gm campaign number: n212328090 (8 speed reaction carrier failure). The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline for assistance. The failure mileage was approximately 109,000.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the transmission temperature message was displayed. The vehicle was taken to an independent mechanic, but the vehicle was not diagnosed or repaired. The vehicle was later towed to the dealer, where it was diagnosed with possible transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. Upon further inspection, the contact discovered that the transmission thermal valve had failed and needed to be replaced. The vehicle was repaired by the contact. The manufacturer was made aware of the failure, and a case was opened. The approximate failure mileage was 101,000.

1st gear to 2nd gear are slipping.

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.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, the vehicle shuddered and hesitated while shifting into gear. No warning light was illuminated. The vehicle was taken to a local dealer, where the transmission was flushed due to a possible torque converter failure; however, the failure progressed. The vehicle was taken back to the same local dealer, where it remained for further investigation; however, no cause for the failure was found. The manufacturer was not made aware of the failure. The failure mileage was approximately 62,265.

Truck shudders when you try to maintain speed. The service engine light is on all the time. Rpms bounce up and down constantly. GMC dealership said it needs a new torque converter. It was $100 just to diagnose it!.

No reverse in transmission and sporadic engagement and shifting in forward gears.

Truck has under 45k miles on it. After reaching 35-40mph, it began to shake and jolt. Once we drove approximately 20miles, the engine light began flashing, in addition to the parking break light turning on. The truck began to lose power and we were forced to pull over on the side of a busy road. After waiting a little bit, we were able to drive it to our local shop who advised us to tow it back the the dealership for repairs.

The transmission is making a clanking noise during the lower gears. The local dealer said the transmissions is "done for". The truck has around 125,000 miles on it. The truck is available for inspection. When checking for recalls, I saw the GMC were being recalled for the same issue.

Throttle body failure anti brake lock failure throttle position sensor failure power reduced *vehicle has been to repair shop 3 times and the issue prevails. It poses a risk to my community because my loses power sporadically*.

Engine is jerky read online issues have a lemon lawsuit . The dealership said it was an 02 sensor it didnt fixed the issues.

The truck started to vibrate badly. Brought it to the dealership and have to replace the 6. 2 l engine. I was happy to make it home without it breaking down. The truck only has 67,000 miles on it.

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving approximately 15 mph, after making a left turn at a traffic signal, the rear wheels locked up. The contact stated that there was an abnormal screeching sound while depressing the brake pedal in a panic stop, and the vehicle jolted violently. The contact stopped the vehicle with the engine still running and observed the "service engine soon" message displayed. The contact attempted to drive forward, and the rear wheels locked up. The contact was able to drive the vehicle to an auto parts store. The contact stated that a store representative used a handheld scanner and was able to retrieve dtc: p0747 (transmission valve body #1 open). The vehicle was not taken to a dealer or independent mechanic. The vehicle had not been diagnosed or repaired. The manufacturer was not informed of the failure. The contact researched online and related the failure to NHTSA campaign number: 24v797000 (power train); however, the VIN was not included. The failure mileage was approximately 140,000.

The contact owns a 2021 Chevrolet Silverado 1500. The contact received notice of an unknown recall in approximately July 2025. The contact stated that while driving at approximately 65 mph, the vehicle stalled. The vehicle was towed to a dealer, where it was diagnosed that the engine needed to be replaced, and the failure was associated with the recall. The contact was also advised that the parts were not yet available. The contact stated that the vehicle remained with the dealer for three months and was repaired when the parts became available. The contact stated that two days after the repair, while driving at an undisclosed speed, the vehicle vibrated and hesitated. The vehicle was taken back to the same dealer where it was diagnose,d and determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, and three cases were filed. The failure mileage was 81,000.

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.

See attached document for complaint.

Transmission began shifting hard over between 60500 and 62000 miles. Dealership test drove and confirmed it was not normal. The transmission pan was dropped and contained metal shavings and bits. Dealer replaced transmission. During late February 2026, I began noticing some hard shifts again, but am hesitant to pay another $699 diagnostic fee and replacement transmission cost because I feel I am wasting money on a poorly designed and unreliable transmission. I don’t feel confident relying on this vehicle for transportation to medical appointments anymore.

The transmission shudders during light throttle at cruising speeds and low rpms, tachometer show continuous jumps in rpm and vehicle loosing power. No check engine lights. Concerned that transmission behavior can make the vehicle a hazard on highyways. Shuddering and hesitation on acceleration. Transmission fluid was changed at 70k miles and symptoms still persist. Current mileage 71k.

On August 10th 2025 I was driving down the 5 freeway to the airports all of a sudden I notice my check engine light is on. It was Sunday Chevrolet is closed so I got off the exit to go to auto zone in xxx. I stop at a red light my engine shuts off. I tried to turn it back on twice and it starts to smoke where the battery is. I have it towed to Chevrolet fairfield. Where they figure out my ground wire came loose and shorted out. I paid for that to get fixed upon returning to get my vehicle on August 31, 2025 I drive not even 10 miles down the road and I hear a boom and then really loud clanking. I blew my engine. It was diagnosed with the same problems as other 6. 2 gm motors. I have it towed back to fairfield Chevrolet. It sat in fairfield for a couple months due to me working out of town for work and the manager from fairfield Chevrolet started giving me problems harassing me saying that if I didn’t get it off of his lot he was going to start charging me. So I had it towed from Chevrolet fairfield to my house in [xxx] where it has sat since. I have been going back and forth with chevy because I know of the recall however my VIN is not in that recall yet it is the same problems as all the ones with the recall. I am really wanting to fix my vehicle as it has been almost 9 months. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Transmission is making rattling or ticking noise when accelerating , I'm getting hard shifting in 1st and 2nd and some random gears , I have been launched forward when coming to a stop , some hard shifting when kicking down to pass.

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.

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.