10.0
really awful- Crashes / Fires:
- 0 / 2
- Injuries / Deaths:
- 0 / 0
- Average Mileage:
- 8,269 miles
About These NHTSA Complaints:
The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.
« Read the previous 20 complaints
Lifter failure and miss fire
- Zimmerman , MN, USA
I was driving and came to a stop at a red light. When accelerating on green the transmission would not go into gear, stalling my vehicle. Nearly causing the vehicle behind me to rear end me. The vehicle eventually went into gear and started to slowly accelerate with shuttering of the transmission.
- Tucson , AZ, USA
While driving my truck the engine completely shut down. All the dash lights came on initially but then only the check engine light stayed on. My truck never would start back up after that. It was towed to GM dealership who diagnosed catastrophic engine failure.
- Elgin , OK, USA
Was driving on the interstate on [XXX]. While driving, the truck suddenly slowed down and lost power. The check engine light came on and then after about a minute a message popped up on the dash saying that the truck was in reduced-power mode to prevent engine damage, or something like that. It slowed to roughly 50mph and I had to drive for maybe 5 miles to reach the next exit, narrowly avoiding collision from behind with cars driving upwards of 75. Pulled off the road to the first parking lot, then got towed to the nearest Chevy dealership in Shawnee, Oklahoma. The diagnosis was a blown connecting rod that had occurred while driving on the interstate, resulting in a necessary total engine replacement. The truck was repaired in Shawnee, Oklahoma at the dealership. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
- San Angelo, TX, USA
2020 Chevy Silverado LTZ 6.2 V8 10 Speed. Started having issues with hesitation/shudder. Dropped off at a Chevrolet dealership for a diagnostic. The dealership pointed to a potential transmission issue. After having the truck for several days, they reported nothing wrong. Said they drove the truck, checked the transmission fluid, and couldn't find any issues. Picked up the truck and took it to a local repair shop. That shop drove it, but could not re-create the issue I was describing. I opted to have the transmission fluid flushed in hopes of fixing the shudder/hesitation I was feeling. After picking up the truck and driving it a couple hundred miles, the issue was still present. I made another appointment at the same local shop. This time, they called me saying the issue I'm feeling is the same problem that's been happening to these engines, the dreaded AFM (Active Fuel Management) system is starting to fail. I was told by the shop it's only a matter of time before the entire engine fails. The only way to fix the issue is to delete the AFM system by removing the old parts within the engine and replacing with new parts that do not use the AFM system. This would cost approximately $6,000 to complete.
- Augusta, GA, USA
Was driving on highway and vehicle went into "engine power reduced" and dropped from 60mph down to 35mph and then steadily decelerated down and wouldn't go over 18mph. Per mechanic it is the engine coolant control valve and the part is not available and could be months to a year before the part is available. Online shows this is a widespread issue with GM / Chev vehicles but no recall has been ordered and parts not available anywhere. Completely unacceptable to pay $65000 for a vehicle that is just barely 5 years old and have this kind of issue and manufacturer doing nothing about it.
- Chesapeake , VA, USA
When a Check engine light is on it's for a low voltage on the charge air coolant sensor, took to the chevy dealer, they replaced a connector to the sensor, at a cost of $600 never got off lot, light returned, they then said I need a new engine wiring harness at a cost of $100, the dealership said this is a problem with these trucks and GM knows about it but won't recall them. Now I'm struck with a 5-year-old truck that I can't use, When this light is on, I also receive an Emission system warning, and the truck deregulates and goes in limp mode. as speed is reduced it becomes dangerous to drive in traffic, as GM knows about this, they should recall these trucks and fix the problem, they even say it's because cutting corners on the wiring harness cover causes this problem. as a senior living on a fixed income there's no way my wife or I can get this repaired, so were forced to drive it in limp mode until it dies on us, hopefully not in heavy traffic.
- Orlando, FL, USA
Oil pump went out. Got it repaired. Then, a few days later, while driving on the freeway at 70MPH the engine made a lot of noise then quit in middle of the freeway leaving me vulnerable to being hit. Was able to coast in neutral to the edge of the road. Has 73000 miles on it. Dealer says I need an engine replacement after just spending $5,500 for oil pump replacement. Has been at the dealer over a month and no replacement engine is available.
- Aloha, OR, USA
The engine seized up. Yeah, the truck is at a trusted mechanic and he told me that the engine seized. No warning signs. The truck wouldn't start and the engine light was on.
- Big Sky, MT, USA
The lifters failed which caused the camshaft to destroy itself. I am now looking at having to replace my entire motor because of this. This is a similar problem to the current recall going on with the 2021 through 2024 trucks with the same motor. I have 146,000 mi on my truck
- Seabrook, TX, USA
Cylinder Four misfire code. PO304 Dealer has discovered lifter failure. Total to replace all lifters on effected side $4300 Vehicle is garage kept and serviced per required dealership. All service records have been kept. No other issues with Truck 83K miles.
- Knightdale, NC, USA
The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving at approximately 75 MPH, the electronic stability control (ESC), traction control, and check engine warning lights illuminated. The contact stated that several safety features failed to operate. The contact stated that there was a popping sound coming from underneath the vehicle. The contact pulled over to the side of the road to turned off the vehicle and waited before restarting the vehicle; however, the failure persisted. The vehicle was taken to the dealer but was not diagnosed. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 65,000.
- Denver, CO, USA
A few month ago this 2020 Silverado check engine came on in the middle of driving. It stopped shifting and almost caused an accident because it wouldn-??t stop. I took it to the dealer and they found nothing wrong. Today, it is doing the same thing with faulty shifting, especially during first and second gears and when I initially accelerate. It is jumpy and worried and accident will happen if the car stops shifting like before. The check engine light is on again
- Upland, CA, USA
My husband was driving our family truck onto the highway to merge into traffic, when he lost all engine power, several dash lights turned on, and a clanking noise started. This was an extremely dangerous situation because the truck stalled, while trying speed up into highway traffic. He swerved to avoid cars and pulled off to the right shoulder. This a major safety issue because if either of my teenage daughters had been driving the truck, they would likely not have been able to avoid an accident! Mechanics confirmed the truck had suffered a catastrophic engine failure while driving. The dealership confirmed a lifter failed causing the damage. They said the whole engine had to be replaced. GM offered to pay half of cost, proving they know this is an issue. The truck's not even 5 years old, so the fact that engine would just stop while driving, when we had kept up with regular maintenance, sounded bizarre to me. I researched online and learned of 2 class action lawsuits (CA & MI) claiming GM knows about this defect in their engine and continuing to sell trucks with the same safety issue. Not more than 2 weeks after our incident, hundreds of thousands of the 6.3L engines were recalled after a NHTSA investigatio. GM has issued several service bulletins internally on "failing lifters", but has not told the public of the safety hazard. The service bulletins acknowledge the issue, recommending GM mechanics use a lighter oil (SAE-0W20 instead of the customary SAE-0W40) or change the oil more frequently. (service update N212353840). But car owners don't know this! GM is putting lives at risk, as no one expects their engine to completely give out while on the highway. Thankfully, my husband has been driving for 35 years. Had it been a younger, more inexperienced driver, they would not have been able to recover from the engine failure, especially while merging into high speed traffic - causing a crash, injuries and possibly death. The public deserves to know.
- Palm Beach Gardens, FL, USA
I-??m reporting a safety concern involving a 2020 Chevrolet Silverado 1500 with the 3.0L Duramax diesel engine. The vehicle went into limp mode and died on the side of the road. AAA installed a new battery, which temporarily restored operation, though the -??Service Charging System-?? warning remained. I drove it home, let it sit for several days, and then took it to a Chevrolet dealership. Although the warning light had cleared, I brought it in out of caution. The first dealer diagnosed a failed alternator and recommended replacement at a cost of $2,158.75. I was also told the vehicle was not included in any active recalls related to this issue. Believing the price was high and wanting a second opinion, I went to another Chevrolet dealer. They ran the same diagnostic and found no issue with the alternator or generator, charging only a diagnostic fee. They also said if the alternator had needed replacement, the cost would have been around $1,300. I mentioned to both dealers that I had seen similar alternator/charging system failures recalled on other 2020 Silverado models. Online forums and customer complaints suggest that many Silverado 1500 trucks with the 3.0L Duramax are experiencing similar problems, indicating a potentially broader issue. Given the inconsistency in diagnostics, the significant cost discrepancy, and the number of similar consumer reports, I believe this issue may be more widespread than current recalls reflect. I respectfully request that NHTSA investigate whether the existing recall should be expanded or if a new recall should be issued for 2020 Silverado 1500 models equipped with the 3.0L Duramax. This issue occurred shortly after a separate failure related to the NOx sensor, which I am submitting under a separate complaint.
- Mount Pleasant , SC, USA
I am reporting an issue with a 2020 Chevrolet Silverado 1500 equipped with the 3.0L Duramax diesel engine. The vehicle experienced a failure of the NOx Sensor Position 2, which significantly impacted performance and emissions compliance. GM previously issued Emission Recall N212351211 (March 7, 2023) for other diesel Silverado models regarding improper ECM detection of NOx sensor faults. The issue in my vehicle appears functionally identical, yet this engine and model were not included in that recall. The sensor was replaced and reprogrammed at a Chevrolet dealership at the owner's expense. After contacting Chevrolet, a customer retention check was provided, covering roughly half of the total cost. While appreciated, the remaining cost burden remains significant. If this model is eventually included in the recall, it may allow for full reimbursement and support for other affected owners. Online forums show that many 3.0L Duramax owners are experiencing similar failures, suggesting this may be a widespread and systemic defect. Due to the strong similarities with the recalled condition in other models, I respectfully request that NHTSA investigate whether this recall should be expanded to cover additional affected vehicles. This issue presents both reliability and emissions compliance concerns. In addition, the vehicle developed a separate mechanical/electrical problem shortly after the NOx sensor failure. Because it involves different systems, I will file a separate complaint regarding that issue.
- Mount Pleasant , SC, USA
I am reporting an issue with a 2020 Chevrolet Silverado 1500 equipped with the 3.0L Duramax diesel engine. The vehicle experienced a failure of the NOx Sensor Position 2, which significantly impacted performance and emissions compliance. GM previously issued Emission Recall N212351211 (March 7, 2023) for other diesel Silverado models regarding improper ECM detection of NOx sensor faults. The issue in my vehicle appears functionally identical, yet this engine and model were not included in that recall. The sensor was replaced and reprogrammed at a Chevrolet dealership at the owner-??s expense. After contacting Chevrolet, a customer retention check was provided, covering roughly half of the total cost. While appreciated, the remaining cost burden remains significant. If this model is eventually included in the recall, it may allow for full reimbursement and support for other affected owners. Online forums show that many 3.0L Duramax owners are experiencing similar failures, suggesting this may be a widespread and systemic defect. Due to the strong similarities with the recalled condition in other models, I respectfully request that NHTSA investigate whether this recall should be expanded to cover additional affected vehicles. This issue presents both reliability and emissions compliance concerns. In addition, the vehicle developed a separate mechanical/electrical problem shortly after the NOx sensor failure. Because it involves different systems, I will file a separate complaint regarding that issue.
- Mount Pleasant, SC, USA
I have the L87 6.2 liter V8 engine from General Motors. I had sudden engine failure. Apparently the rods and bearings are bad. It is the same problem as the recall issued for 2021-2024 vehicles, exept for my truck is a year 2020. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
- Spring Hill, TN, USA
On [XXX] I pulled off from a Red Light and vehicle started flashing codes. I slowed down and engine was missing. I had vehicle towed to Gilmore's Auto Center in Culpeper Virginia. The truck was diagnosed later that day as a Rod Bearing failure. The engine gave no warnings prior to that day. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
- Rochelle , VA, USA
- Edmond, OK, USA