2020 CHEVROLET SILVERADO 1500 reports

POWER TRAIN

The truck has a serious transmission issue where it either will not shift into gear or gets stuck in a gear. I’ve had several instances on the freeway in traffic where this happens and I’m unable to keep up with the flow of traffic and feared another vehicle would not be able to avoid a collision. I need to exit the freeway and turn the car off for it to reset. But it will often just do this failure again. It creates a very dangerous situation. GM is aware of this, and offered a special warranty repair, but for some reason they refuse to honor the warranty for my truck

POWER TRAIN · ELECTRICAL SYSTEM · UNKNOWN OR OTHER

Q1: While driving my vehicle it started shifting very violently kind-of out of nowhere, without notice and did not resolve. This and many other factors, such as the diagnostic data retrieved from a nearby auto-parts store, lead me to believe this is likely due to an unresolved re-call on the vehicle that I just started receiving in the mail, the TCM Valve/Sensor. The vehicle is available for inspection upon request, at George Nahas Chevrolet, located in Wildwood, FL. Q2: My safety and that of others was severely impacted as it was indeterminate when the vehicle would violently over-rev and up or down-shift, while also leaving the possibility for the vehicle to just stall completely or to potentially have a total "rear wheel brake lock-up" scenario, as mentioned in the NHTSA Re-Call. (N242454440 | RIONL-24V797-0912) This issue left me stranded and the vehicle was towed to a nearby GM Dealership, noted above. Q3: This issue was noted in third-party/independent diagnostic data (available upon request), prior to delivery of the vehicle to the dealership. Additionally, the issue was noted at the GM Dealership after four (4) months of repair attempts. The issue was re-encountered during a test drive when the dealership tried to return the vehicle to me un-repaired, demanding payment w/o invoice. The GM Certified Diesel Technician and I test drove the vehicle and found the issue to be the same or even worse. During this test drive, the GM Diesel Tech noted that the TCM could likely be one of the primary issues causing or contributing to the harsh shifting. Q4: The component was supposedly inspected and replaced by the dealership. However, the NHTSA Re-Call is still showing as INCOMPLETE and the dealership will not provide me with an invoice or any data regarding this matter. The manufacturer was notified months ago and asked to provide data in relation to this matter, but still no resolution. Please let me know if you can inspect and/or assist in any way. Q5: No

POWER TRAIN

ruck hesitated when shifting at lower speeds and created a hazard while driving. Transmission isssues are known to Chevrolet and nothing is being done about it. My son’s Chevy Colorado did the same thing in 08/26 (got fixed at a Chevy dealer and was reported to NHTSA). This needs to stop and needs to be further looked into with Chevy! I have receipts and proof if needed (keeps giving me an error when I try to upload it)

SERVICE BRAKES

Was driving for about an hour pulling our 7,000 lb camper when all of sudden my daah lit up with all kind of lights and warnings. The messages were Service Trailer Btake System, Service ESC, Service Parking Brake, Brake System Failure 62mph top speed, check engine light, Traction Control Off, ABS Off. Pretty much had no brakes and had to use the manual gear selection to slow down from 65 mph. Not a good feeling wh no brakes pulling a camper. The brake pedal was hard and used everything I had to get it to go in to try to stop. Now my rear brakes on the truck currently making all kind of noise and the truck went to the mechanic today.

POWER TRAIN · SERVICE BRAKES

Truck has less than 30K miles with normal usage and rear axle was leaking onto the brake disk and brake pads. This could potentially have caused braking problems. The dealer noticed this problem during a routine oil change. Dirt had crusted on the leakage area and none of the fluid had leaked upon the ground and was therefore not noticed while in the garage. There was no obvious external warning that this issue existed. Have currently scheduled a repair with the dealer, which includes new brake pads and disk resurfacing.

ELECTRICAL SYSTEM

Truck would not start - it left me stranded. The main body to engine ground strap had rotted off. I found there is a Chevrolet Customer Satisfaction Program (N252515590) for ground straps rotting for the same make/model/year as my vehicle, but for some reason mine isn’t listed by VIN number in the program.

ENGINE

Incident: Twice our Chevrolet Silverado 2020 Duramax has experienced while operating, sudden with no warning "reduced engine power" and "check engine light" the engine sounds very different and does not operate as it should and presents a safety issue when you are driving and traveling at a high rate of speed. These incidences occurred on 10-4-2026 and 10-23-2026. The vehicle experienced a sudden failure of the engine coolant control valve, triggering Diagnostic Trouble Code P1006. This component failure restricts proper engine thermal management and poses a risk of sudden engine overheating while driving. General Motors has formally acknowledged this identical part failure as a chronic manufacturing and safety defect via Special Coverage Bulletins N252508341 and N252508340, which extend warranty coverage to 15 years/150,000 miles. However, GM has arbitrarily excluded the 2020 model year from this coverage, despite the vehicle utilizing the exact same defective part assembly number as the covered 2021-2023 models. This identical component failure across model years constitutes an unaddressed defect pool that requires immediate regulatory expansion to protect consumers from unsafe engine component failure. please fix this situation TY

ELECTRICAL SYSTEM · UNKNOWN OR OTHER · SERVICE BRAKES

It said on the dash, "Brake System Failure 43MPH Top Speed," "Service ESC," and lights on were the ABS light, BRAKE light, Engine Light, and Wheel Traction light. My wife and my [XXX] son's safety were at risk while driving on a busy 75mph highway and trying to turn around and make it home as the brakes did not work and having to cross busy streets. It was not able to reproduce but my local mechanic found the bulletin from way back that had not been addressed by GM after numerous times to a dealer for other repairs. I then took it to a local GM dealer that confirmed software update was not applied and they did the repair and I was charged to pay even though this was a known GM issue that never contacted me about this potential fatal random occurrence that could happen after I have taken great care of this truck. There not any warnings before randomly losing power on the highway once she hit 60mph on the on ramp and just started failing slowly. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN · ELECTRICAL SYSTEM

1. Transmission Issue: Since purchasing the vehicle, I have experienced ongoing transmission problems. The transmission exhibits noticeable shifting issues, including delayed response, harsh/rough gear engagement, and erratic shifting behavior while driving. 2. Intermittent Electrical & Sound Failure: In addition to the transmission issue, the vehicle has developed a severe intermittent electrical malfunction. Without warning, all audio and electronic sounds in the cabin completely turn off ("go mute"). This includes the loss of interior warning chimes, system alerts, and the audible turn signal clicker. The system restores itself randomly ("goes back when it wants to"), making the issue unpredictable. Safety Concern: The sudden loss of audible turn signals and safety warning chimes presents a driver distraction and safety hazard while operating the vehicle on public roads.

ENGINE

Had a misfire in cylinder 4 so I took it to the dealership to diagnose. It held compression and switched the plugs and still had the same misfire. They said it was a common issue that the lifters go out with the DFM. It only has about 50k miles on it and I am the original owner

UNKNOWN OR OTHER

We were traveling at approximately 65 miles per hour while towing our Coachmen Apex travel trailer with our 2020 Chevrolet Silverado 1500 LT equipped with the 3.0L Duramax diesel engine. During travel, we heard a loud popping sound originating from beneath the hood. There were no warning/engine lights or smell. Immediately afterward, we observed substantial smoke billowing from the front of the vehicle.We pulled off the highway as quickly as possible. Smoke began entering the passenger compartment through the ventilation system, and we observed flames beneath the hood. Recognizing the immediate danger, we evacuated the vehicle and removed our dog. We attempted to extinguish the fire using a fire extinguisher; however, our efforts were unsuccessful. The fire spread rapidly, and within minutes, the truck became fully engulfed in flames. The speed and severity of the fire left us with very little time to escape. We are fortunate that we were able to get ourselves and our dog out of the vehicle. This was a frightening and traumatic experience that placed our lives at serious risk while traveling on a major interstate highway. The incident also raises serious concerns about the safety of this vehicle and the potential danger posed to its occupants, other motorists, and anyone traveling nearby. We purchased and meticulously maintained this vehicle with the reasonable expectation that it would provide safe, reliable transportation. Instead, our 2020 Chevrolet Silverado 1500 LT experienced a catastrophic fire while traveling at highway speeds and towing our travel trailer, resulting in the complete destruction of the vehicle. Although we were able to escape, this incident could have resulted in serious injuries or fatalities. The rapid progression of the fire, combined with smoke entering the passenger compartment, raises significant concerns about vehicle safety and the time available for occupants to escape.

POWER TRAIN

Transmission started slipping for no reason around 100 thousand miles. All maintenance had been done no code was ever shown on dash no check engine light took it to 3 different places and had it tested all said the same thing they couldn't find anything wrong. Now its sitting at the shop and they are saying its the Transmission and it needs a new one.

POWER TRAIN

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while attempting to reverse at an undisclosed speed, the vehicle accelerated independently. The check engine warning light and transmission warning light illuminated. The vehicle was towed to a dealer, where it was diagnosed that the engine and transmission required replacement. e. The failure mileage was unknown.

POWER TRAIN

What failed: The automatic transmission on my 2020 Chevrolet Silverado 1500 Custom 4WD, 2.7L turbo (VIN [XXX]). It has an intermittent shudder, a stuttering vibration felt through the truck, under light throttle and under load. The truck is in my possession and available for inspection on request. Safety risk: The shudder happens during acceleration and under load, when smooth power delivery matters most, such as merging or climbing grades. I tow a 20-foot camper in the summer, which puts the transmission under heavy load, and a driveline problem while towing raises the risk. No crash or injury has occurred. Confirmed by a dealer: Yes. On XXX, at 44,934 miles, Serra Chevrolet in [XXX] confirmed the transmission concern under GM service bulletin 20-NA-142, which the dealer confirmed applies to my VIN (repair order XXX). The technician performed a transmission fluid exchange as the recommended repair. I will update this report if the shudder returns. The technician confirmed the contaminated fluid from the factory. Manufacturer or others: The dealer submitted a goodwill request to GM, which GM declined, so I paid for the diagnosis and repair myself. No police or insurance inspection, since there was no incident. Warning lamps and symptoms: No transmission warning lamps or messages appeared. The only symptom was the shudder itself, which first appeared around XXX. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

STRUCTURE

GM Corporate Legal has formally denied a repair for a known design flaw (TSB 18-NA-383) that has caused progressive structural corrosion and water intrusion underneath the cab carpets near vehicle electrical routing since 2024. The certified GM technician explicitly identified GM Technical Service Bulletin #18-NA-383 as the governing bulletin for this exact issue. The technician’s diagnostic notes state word-for-word: "...i inspected the truck and the rear window is leaking i can see water stains on the window and the head liner has a big water stain. the floor is not rotted out but the rear of the rockers and the cab corners are rotting and bubbling under the paint." This proves the structural rot is being caused from the inside out by a factory defect, not environmental road salt. I have a duplicate large packet that I sent including +15 dated photos to GM corporate/legal back in August.

ENGINE

I was driving the vehicle at around 50MPH after leaving a set of traffic lights when the engine lost all power and a series of warning lights came on. I pulled over safely to the side of the road and had the vehicle towed to a local vehicle mechanic shop. On investigation the engine had seized and a number of internal components had failed. The engine/vehicle I have owned since new and had approximately 103000 miles on it at the time of the incident.

VEHICLE SPEED CONTROL · FUEL/PROPULSION SYSTEM

I received a notice via OnStar of a P129 code of a critical issue with engine or transmission system on my 2020 Silverado pickup after I pulled on to the highway. Vehicle reduced engine power warning and engine light came on. I was forced to put vehicle in neutral and restart vehicle several times. This code indicates fuel pump control module being defective. After researching, there seems to be issues with this on the the following; General Motors has issued voluntary emission recalls (such as bulletins N252516900 and N262558690) for the fuel pump power control module on select 2021–2023 Buick, Cadillac, Chevrolet, and GMC vehicles. The issue with my vehicle is the same.

POWER TRAIN

My transmission was shuttering from about 10,000 miles to 67,000. I reported it multiple times to the dealership and they did nothing about it until the 67,000 mark when they finally replaced it. the new transmission started to downshift very hard as soon as I got it back from the dealer and it just got worse I took it back and they had diagnosed that it was bad. They are in the process of replacing the transmission, a second time which would be my third transmission They’ve had my truck for 36 days. Clearly, General Motors and the dealership cannot figure out how to get my transmission to work properly. It’s a danger to my family and those on the road if it fails while on the highway.

POWER TRAIN · ENGINE

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that the engine was previously rebuilt. While driving at an undisclosed speed, the vehicle jerked and lost motive power, with several unknown warning lights illuminated. The vehicle was pushed to the side of the road and towed to an independent mechanic, who determined that the engine had low compression, and that the engine and transmission needed to be replaced. The manufacturer was notified of the failure by phone. The failure mileage was approximately 140,000.

POWER TRAIN

Transmission failure around 63000miles. Jasper rebuilt transmission having issues at 130000

POWER TRAIN · ELECTRICAL SYSTEM · ENGINE

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving, the vehicle was shuddering. The vehicle was taken to the dealer and was diagnosed with transmission failure. The contact was informed that the torque converter and transmission needed to be flushed. While driving approximately 30 MPH, the vehicle was shuddering and the transmission seized, with the check engine warning light illuminated. The failure had occurred briefly, and the failure was self-corrected, and the contact continued driving. The failure reoccurred approximately 2 - 3 times. The vehicle was returned to the dealer, and the transmission was replaced. The failure persisted, and the vehicle was returned to the dealer, and the transmission was replaced a second time. The vehicle was returned to the dealer, who was unable to diagnose or repair the vehicle. The contact drove the vehicle an additional 20,000 miles before the vehicle received additional repairs. The manufacturer was informed of the issue several times. The failure mileage was approximately 73,000.

ENGINE

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving 65 MPH, the engine lifters failed to operate as intended. Additionally, the lifters were replaced three years prior to the failure reoccurring. The dealer was contacted and the vehicle was diagnosed with lifter failure. The manufacturer was contacted by phone and made aware of the failure. The failure mileage was approximately 120,000.

ENGINE

I was driving down the highway doing 70mph when my check engine light started flashing. I had to pull over and turn off my truck and turn it back on in order for it to go away. I brought it to the dealership and they explained that I had a misfire on the entire driver side of the engine and I would need to replace it. I have kept up on all of my vehicle maintenance but it still requires a new engine, costing $11,000 if not covered under warranty. This is a known problem with the Chevrolet 6.2L V8 engine and is now a class action lawsuit with the company.

POWER TRAIN · ENGINE

Vehicle is hard shifting and has the following error codes. Engine P0700 Transmission Control Moduel Requested, test not passed Transmission P0747 Transmission control solenoid Valve 1 stuck on- Test failed. Warning indicator requested. Very concerned to be driving this vehicle.

POWER TRAIN · ENGINE · FUEL/PROPULSION SYSTEM

have notice that the car jerks hard from time to time and when try to accelerate the car does a quick/short stop then accelerates hards very jerky. Also I smell coolant and my check engine light came on..

VEHICLE SPEED CONTROL · WHEELS · SERVICE BRAKES

1) The vehicle experienced a rear axle/rear-wheel lock-up after the recall-related repair was performed and the same diagnostic codes associated with the initial repair reportedly returned. 2)The rear axle/rear wheels locked while the vehicle was being driven on the highway, creating a significant loss-of-control and collision hazard. A sudden drivetrain/axle lock-up at highway speed causes the vehicle to stop or behave unpredictably, potentially resulting in a severe collision 3) Yes. Huffines Chevrolet performed the initial recall-related repair and subsequently the same diagnostic codes reportedly returned after said repair 4) The vehicle has been inspected by 2 Chevrolet dealerships, including Huffines Chevrolet and El Dorado Chevrolet/Motors. The matter has also been reported to GM Customer Assistance under Case No. 110236243 5) Yes. Diagnostic codes associated with the recall-related issue were present when the vehicle was initially taken to Huffines Chevrolet on August 10, 2026. Huffines performed recall-related repairs, including replacement of the transmission module as part of the attempted repair. After the vehicle was returned, the problem recurred. On August 28, 2026, while driving on the highway, the rear axle/rear wheels locked, and the same diagnostic codes reportedly returned.

POWER TRAIN

I have notice that the car jerks hard from time to time and when try to accelerate the car does a quick/short stop then accelerates hards very jerky.

STEERING · ELECTRICAL SYSTEM

While driving I lost the power steering on the vehicle. I took my truck to a chevy dealership and scheduled an appointment for the following day. I research the problem and found that there was a Customer Satisfaction Program bulletin (N252515590) issued covering this specific issue for my trucks model year but it did not cover my specific VIN. I contacted Chevrolet Customer Assistance and they told me to file a complaint with NHTSA.

ELECTRICAL SYSTEM

What component or system failed or malfunctioned, and is it available for inspection upon request? The A/C condenser and the vehicle battery failed. The failed components are available for inspection upon request. How was your safety or the safety of others put at risk? The A/C failure causes the driver's side to blow warm air, creating severe window fogging and reducing visibility in extreme weather, while the electrical/battery failure compromises vehicle operation and safety features. Has the problem been reproduced or confirmed by a dealer or independent service center? The A/C issue matches General Motors Technical Service Bulletin PIT5767A, caused by an internally bypassing condenser due to a mispositioned block-off plate. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has not yet been officially inspected by a manufacturer representative, but the defect aligns with known GM manufacturing specifications under bulletin PIT5767A. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Symptoms appeared suddenly with the air conditioning losing performance (driver's side blowing significantly warmer than the passenger side) alongside concurrent battery and electrical system failures.

POWER TRAIN · ELECTRICAL SYSTEM

rear axle locks up and transmission goes into limp mode , this happens when slow speed under acceleration, this happens almost any time in traffic , at stop light , acceleration to freeway. a safety issue, shows a p0700 code and p2729 code , engine service code light goes on , T/C and skid lights. also happen at hard brakes in traffic lights or fast slow downs

POWER TRAIN

The contact owns a 2020 Chevrolet Silverado. The contact stated that while driving between 20 mph and 60 mph, the vehicle shudders a lot while accelerating. The vehicle was taken to an independent mechanic where it was diagnosed with a failure in the transmission. The contact stated he contacted a dealer where they confirmed the failure but stated there are no recalls nor TSBs related to the failure, although there are recalls for different model vehicles that have the exact same transmission as the contact's vehicle. The contact referenced TSB 19-NA-121 (powertrain); however, the VIN was not included in the repair. The contact stated he could feel the shaking shuddering. The manufacturer was notified of the failure. The vehicle was not repaired.

SERVICE BRAKES

While driving my 2020 Chevrolet Silverado 1500, the braking system suddenly malfunctioned without any prior warning. When I released the accelerator, the vehicle began slowing as though the brakes were being applied even though I was not pressing the brake pedal. When I attempted to brake normally, the vehicle did not stop as expected and braking ability was significantly reduced. The red BRAKE warning, ABS warning, traction/ESC warnings, and check engine light illuminated. The dashboard displayed “Brake System Failure – 43 MPH Top Speed,” “Service ESC,” and “Service Trailer Brake System.” Because of the reduced braking ability, I stopped the vehicle and had it transported by flatbed tow to a Chevrolet dealership rather than continue driving it. The Chevrolet dealer inspected the vehicle and documented diagnostic trouble codes P25A2 and C053D. The dealer stated that the Brake System Control Module requested the warning light and that updated software was available to address these codes. The dealer reprogrammed the Brake System Control Module according to a GM technical service bulletin. No mechanical brake components were replaced. I was charged $362.95 for the diagnosis/reprogramming. I am reporting this because the failure occurred suddenly while the vehicle was being driven and resulted in significantly reduced braking ability, creating a serious risk of a crash. The vehicle had approximately 74,221 miles at the time of the incident. The dealer repair invoice documenting the codes and repair is available upon request.

STEERING · ELECTRICAL SYSTEM · EXTERIOR LIGHTING

Body to frame ground cables corroded in half two different times within about 6 months. First time engine wouldn’t start had to have it towed to dealer for repair, over 30 codes were shown when this happened. Next incident some of my lights were working intermittently and my steering was rendered inoperable for 20 to 30 seconds at a time making it impossible to steer the vehicle, several codes were found when this happened, I drove the truck to a Chevrolet dealer for repair. Both repairs were deemed to be corroded ground cables. Chevrolet has a “customer appreciation program” covering 2019-2024 Silverado trucks but for some reason my VIN number doesn’t land in the program even though it has the same issues that are covered for the other silverados.

ELECTRICAL SYSTEM · STRUCTURE · UNKNOWN OR OTHER

Rear windows water leak. May caue electrical issues and mold in the cab

ENGINE

Motor blew up. 6.2 L87. 2020 silverado 90000 miles, this will be the 4th motor

SERVICE BRAKES

Complete brake system, master cylinder, pads, rotors. Only 75000- miles. Morning start and the brakes are locked up. Had to get towed and the entire system needed to be replaced. So after several days and almost 5,000 I started driving home. After about 5 miles something fell off the front brakes and bounced along underneath but I was close to home so I continued and didn't need to apply the brakes until my driveway and then a terrible grinding sound. Called the dealer (Modern Chevrolet) Winston-Salem NC. Turns out the Einsteins who did the work forgot to tighten the bolts holding the rotor and one fell out and the other one was grinding against the wheel. So another extended stay at the dealership to correct this, a new wheel and correction to the brake components.

FORWARD COLLISION AVOIDANCE

Vehicle came to abrupt stop with no warning and no reason. There was not a vehicle in front of me, nor behind me when this occurred. If there had been a vehicle coming behind me there would have been a collision.

ELECTRICAL SYSTEM · SERVICE BRAKES

While stopped at a highway red light, the vehicle jolted forward and numerous dash lights came on, including messages saying “Brake System Failure, Service ESC, Service Trailer Brake, Service Parking Brake, Engine Power Reduced, Power Steering Reduced.” This is the first time any of these messages have ever appeared. This made the vehicle incredibly difficult to steer and the braking ability was almost non-existent. Had this happened one minute earlier or later, a multi-vehicle and potentially fatal accident would likely have occurred. Vehicle was towed to a dealer who confirmed the error messages and severely reduced performance. To me, this seems consistent with GM service bulletins PIT5730 and 20-NA-073. The dealer, however, is quoting me $3,700 to repair the master cylinder and electronic control braking module. Whatever the case, this absolutely needs to be upgraded to a recall before this happens to somebody at the wrong time.

FUEL/PROPULSION SYSTEM

Vehicle sent alert on phone saying battery critically low, then the vehicle started having fuel gauge issue and started lurching. Shut the vehicle down saw a P129F in the alerts. Checked battery vehicle was a no start. Luckily near a shop so it wasn't catastrophic and was able to r eplace the fuel pump control module and it instantly started. This part NEEDS to be recalled it is a safety hazard that chevy does not aknowledge

ENGINE

My 2020 high country with a 6.2 l is 6 months away from the recall. Driving on the interstate with my family coming out of devil's Tower lost all power!!. I just replaced my motor at 60000 miles total engine loss catastrophic bearing failure!! This is the exact sameproblem from the 2021-2024 recall on the GMC 6.2liter

POWER TRAIN

Purchased used in 02/2022. Pickup started to shutter when shifting at 35-45 MPH. Took it to Turnpike Chevy who found thrust bearing in reaction carrier broken and damaged planetary gear set. They replaced the reaction carrier ASM and Reconditioned the transmission ASM. Replaced the valve body ASM. Took to John Sauder Chevy numerous times between July 19 2024 and July 7 2025 due to the shutter when shifting having returned. They tried the GM approved fix of flashing the computer to reprogram and kept saying they could not duplicate. On June 18, 2025 while towing a trailer on the highway while going highway speeds in the middle of rush hour traffic the transmission suddenly started making a shrill noise. Transmission disengaged and lost power. John Sauder Chevrolet found a broken oil pump drive and drive gears on the 10L80E transmission. GMC refused to replace the transmission and now it is out of warranty and starting shutter again when it shifts

STEERING · ELECTRICAL SYSTEM

On July 22, 2026 took truck to dealership for oil change and reported getting random (trailer brake, power steering) service alarms. Was told it might be a ground strap issue and was sent on my way. After investigating, there is a GM service bulletin (#23-NA-201) on the issue but does not cover my truck. After a week of vacation, began driving truck again and alarms became more frequent, including loss of power steering and jerking of steering wheel while driving. Arranged with dealership to replace the ground strap (at my expense). By the time they could schedule, the alarms were constant and the truck had completely lost power steering. One of the power steering failures nearly resulted in an accident while turning.

POWER TRAIN · ELECTRICAL SYSTEM · ENGINE

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that the infotainment center intermittently went black, and there was water leaking into the vehicle through the top and lower center of the front windshield and the rear windshield. The vehicle was taken to a dealer, where the rear windshield was replaced without a diagnostic being performed; however, the failures persisted. Additionally, the side view mirrors intermittently failed to unfold when starting the vehicle. The contact stated that while driving approximately 40 MPH, white smoke emitted from the exhaust, the vehicle hesitated, and it lost power. The Check Engine warning light illuminated, along with "Service Electronic Stability Control", "Trailer Brake System", "Steering Assist Reduced", "Service Brake Assist", and "Brake System Failure" messages, and the vehicle failed to exceed 40 MPH. The vehicle was towed to a second dealer, Arcadia Chevrolet Buick (210 S Brevard Ave, Arcadia, FL 34266), where it was diagnosed that the lifter and torque converter had failed. The lifter and torque converter were replaced, and the system was flushed. Approximately 800 miles later, the engine failed again. The vehicle was towed to an independent mechanic, who diagnosed that the torque converter and transmission had fractured. The torque converter and transmission were replaced; however, the warning lights and messages illuminated again, and the vehicle continued to hesitate when driven over 42 MPH. After being parked for a few days, the warning lights were no longer illuminated and the mirrors opened, but the engine hesitation persisted. The vehicle was not further diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 10,000.

ENGINE

Engine defect,I was driving down Claiborne ave.,and my truck just cut off while I was doing 50 mph with my daughter in the truck with me,an 18 wheeler came real close to running in the back of me,also my fuel door popped out,I brought it to West Bank gmc lagacy and got it fixed,this will be my 2nd time getting this same part fixed.

POWER TRAIN · UNKNOWN OR OTHER · ENGINE

Vehicle: 2020 Chevrolet Silverado 1500 4x4 LT (5.3L V8 Engine) Component: Engine (Piston Rings, Lifters, and Motor Assembly) / Powertrain Component Availability: Yes, the failed components/vehicle are available for inspection upon request. What Happened and Safety Risk: While operating the vehicle on Prince Street in Clovis, NM, the engine suddenly began knocking violently without any prior warning or symptoms. Immediately following the mechanical failure, dashboard warning lights illuminated (including the Check Engine light, ABS, and Traction Control) and the vehicle dropped into "Reduced Engine Power" mode. This caused an immediate and hazardous loss of acceleration on an active roadway, forcing an emergency maneuver to navigate out of traffic and pull over safely. This sudden powertrain failure poses an unreasonable and severe safety risk to the driver and surrounding traffic. Confirmation and Inspections: The mechanical failure has been confirmed and diagnosed by Hamilton Chevy in Portales, New Mexico, and Sanders Repair Services in Portales, New Mexico. The vehicle and components have not been inspected by the manufacturer, police, or insurance representatives. There were no warning lamps, messages, or symptoms of any kind prior to the sudden failure.

ENGINE AND ENGINE COOLING

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving 55 MPH, the vehicle suddenly began to shake, vibrate, and lose speed. An abnormal knocking sound was heard coming from the engine, and the check engine warning light illuminated. The vehicle was towed to the contact's residence, where the contact, a master mechanic, examined the vehicle. The contact diagnosed that the fuel management system, lifter springs, camshaft lifters, engine push rods, and rocker arms needed to be replaced. The vehicle was not repaired. The local dealer was notified of the failure and informed the contact that the VIN was not included in NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The contact stated that the vehicle experienced the same failure described in the recall. The manufacturer was not notified of the failure. The failure mileage was 11,450.

POWER TRAIN

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving at 55-65 MPH, a rattling sound was heard coming from the front passenger-side of the vehicle. No warning light illuminated; however, the contact noticed that the voltage levels were between 9 and 11 volts. The vehicle was taken to the dealer, where it was diagnosed that the transmission had failed and needed replacement. The vehicle was not repaired. The manufacturer was notified of the failure and filed a case. The failure mileage was approximately 79,000.

ENGINE

My lifter failed in my Chevy Silverado 1500 on the highway, causing severe shaking while driving and an array of dash lights. After taking it to a local. Chevy dealer, they confirmed a lifter collapse and possible damage to my cam shaft. I have been up to date on all oil changes with premium synthetic oil, and there were no prior dash lights indicating a problem.

ELECTRICAL SYSTEM · SERVICE BRAKES

I went to the store and my brakes were working as normal. When I started my truck to leave I had a hard pedal and there we several warnings on the dash. One said to get service and the other said to limit speed to 43 MPH. I had almost no braking power. Fortunately, I was close to home and the speed limit was 30 MPH all the way home. Once I arrived home I cleared the code with my ODBII scanner and the brakes worked as expected. If I was towing my boat this could have been a bad situation resulting in an accident. I haven't had the same issue in several days however this has to be a huge liability for GM. I'm sure that this is a known failure mode for GM.

STRUCTURE

Paint delaminating from front fenders. No outside influence to cause it.