2019 Chevrolet Corvette

GM has a well known issue with the transmission fluid used in assembly on a range of cars and dates which include my 2019 Corvette. The fluid used fails/ is defective. The process to fix the issue is to flush the fluid out and put in a different fluid. In the case of my Corvette, it actually requires a very expensive triple flush to ensure all of the original Dexron fluid has been removed and is replaced my Mobil fluid. The process is explained in an 18 page service bulletin 18-NA-355. This bulletin states that if a customer comes in complaining of shake/shudder during acceleration between 25 to 80mph or when the trans is not actively shaking, then there is no need to further diagnose. Just follow the procedure in the service bulletin. In other words, there is no need to investigate further because we already know what the problem is which is the defective Dexron fluid. This was my exact experience with the shake/shudder and the triple flush completely fixed the issue. My vehicle has 17k miles on it so this was no a normal maintenance issue nor would you expect a full flush of transmission fluid at 17k or really at any point. Perhaps adding some fluid at some point would be reasonable. Having to completely remove all traces of the assembly line fluid with a completely different fluid clearly indicates a defect in the original Dexron. The service bulletin clearly indicates GM knows that the Dexron is defective. A final note, a quick web search of this issue will bring up pages of threads of people who have experienced this exact issue. Please hold GM responsible for their error. Thanks

Incident Jan 1, 2025

My vehicle has been a legacy gmc dealership in Slidell la for three months now waiting on a replacement engine from a factory failure. And I have no clue when and if I will ever get it back because all General Motors is says is that the engine is on back order and from what I’m reading they discontinued this engine back in 2023. They haven’t helped me with anything I been paying my car note and renting a vehicle at my cost and they’re doing nothing. And I can’t get them to give me any info on if or when this will get fixed . Meanwhile, this is putting a huge financial burden on me and my family and GM doesn’t give [XXX][ about it. Companies like this be allowed to just walk over people with no record of their actions. Thank you for any help with this. I’ve reached out to everyone and no one will help. Thank you. case number [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Incident Jan 1, 2025

Engine blew up and it’s been at dealership waiting on GM to replace sense January 2025. And GM has done nothing to fix the problem. Been paying car note and renting a vehicle at my cost also . And they are still doing nothing. How can these people be aloud to treat Americans like this without any recourse?

Incident Jan 1, 2025

The contact owns a 2019 Chevrolet Corvette. The contact stated that while driving at an undisclosed speed, there was smoke coming from the engine compartment. The contact pulled over to the shoulder of the roadway to inspect the vehicle. After a visual inspection of the engine compartment, the contact observed that the #5 and #6 spark plugs had burned and melted. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the high-pressure fuel pump causing the vehicle to run lean, resulting in damages to the engine and spark plugs. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact was informed by the dealer that the manufacturer was no longer producing the 6.2-liter V8 engine for the year, make, and model. The manufacturer was notified of the failure, and a case was opened. The failure mileage was 35,000.

Incident Feb 6, 2025

The contact owns a 2019 Chevrolet Corvette. The contact stated while driving at an undisclosed speed, the front tires became low on air. The contact noticed that the wheels were cracked. There were no warning lights illuminated. The vehicle was taken to the local dealer for routine maintenance, and it was determined that the rear wheels were cracked. The wheels were replaced. The manufacturer was contacted, and it was confirmed that there was no warranty coverage on the vehicle for the failure. The failure mileage was approximately 34,000.

Incident Jan 1, 2023

The Corvette C7 Grand Sport wheels/rims are faulty. They bend and crack under normal driving and are dangerous.

Incident Jul 19, 2024

The contact owns a 2019 Chevrolet Corvette. The stated that the passenger's side rear tire was continuously loosing air. The vehicle was taken to the dealer where it was determined that the rear passenger’s side rim was cracked. In addition, the contact was informed that the driver's side front and rear rims were also cracked. The contact was informed that all three rims needed to be replaced. The rims were ordered but were not yet replaced. The vehicle was not yet repaired. The contact stated that the passenger's side rear rim was previously replaced in April 2023. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 28,291.

Incident Sep 6, 2024

My 2019 Chevrolet Corvette Stingray, the transmission system along with the torque converter began to malfunction as the car seemed to change from different modes. This malfunction caused the transmission to shudder, which caused a very bad vibration while accelerating and driving between the speed of 25-70mph. These actions or behaviors by the car surely poses a control and stability risks well as a safety risk for everyone on the highway and to myself. This issue was confirmed by the GM dealership I took the car to on 8/23/2024 and they said they could not get to it until 9/9/2024 and they will have to do a triple transmission fluid flush based on a service bulletin (TSB 18-NA-335) which was issued by General Motors. My car gave me no warning by way of lights or messages within the car. I would like to know why this repair is not covered under the service bulletin since General Motors knows this is a issue with the cars.

Incident Aug 17, 2024

In my 2019 Chevrolet Corvette Grand Sport, the transmission system began to malfunction, specifically related to the torque converter. This malfunction caused the transmission to shudder, creating a noticeable vibration during acceleration and driving. The unpredictable behavior of the vehicle due to the shuddering compromised control and stability, posing a risk to my safety and the safety of others on the road. The problem was confirmed by the dealership's service center, which performed a transmission fluid flush according to the service bulletin (TSB 18-NA-355) issued by General Motors. Although there were no specific warning lamps or messages, the shuddering symptom appeared several months before the repair. The dealership corrected the issue by performing the necessary service, which cost me $853.52, an amount I paid under protest as I believe it should have been covered under the service bulletin. The vehicle is available for inspection upon request, and the dealership, acting as an authorized representative of the manufacturer, diagnosed and addressed the issue.

Incident Jul 8, 2024

Rear passenger wheel cracked for no apparent reason.

Incident Jun 29, 2024

The low tire presure dash indicator indicated that the right rear tire was low (17 psi). The tire shop found that the inner flange of the wheel had cracked, resulting in a leak and a safety issue. The vehicle has only 18K miles and is not driven hard or raced. Could this be a safety recall issue?0

Incident Apr 1, 2024

I have had 2 wheels crack before 14000 miles. No track driving or racing. This happened under normal driving conditions.

Incident Mar 18, 2024

Both headlights when out with only 9500 miles. Bulbs replaceed 12/9/23 DeLillo Chevrolet.

Incident Sep 9, 2023

Shuddering occurs at speeds between 25-75 mph. GM has s TSB #18- NA-355. This bulletin accurately describes what I was experiencing. They know that there is a problem with their 8 speed automatic transmissions, but will not tell consumers about it. There should be a recall to fix all of the vehicles effected during the time of defective transmission fluid..

Incident Aug 24, 2023

Purchased the vehicle with 7944 miles, currently has around 11,000. One of the tires was leaking air so had an auto repair shop look at all the tires and rims. THREE of the rims are cracked. I am not driving the vehicle for safety reasons. It is not safe to drive with a cracked rim. I did not hit any road hazards or pot holes. The rims appear to be defective and after 11,000 miles should not have damage.

Incident Aug 30, 2023

I HAD 2 REAR 2019 CORVETTE GRAND SPORT OEM WHEELS CRACK, AND LEAK AIR REQUIRING EXPENSIVE REPLACEMENT, I ALSO HAVE THE OTHER 2 ORIGINAL WHEELS NOW BENT. THE DEALER IN TERRYVILLE CT WAS NOTIFIED, BUT GM DENIED THE CLAIM - I STILL HAVE THESE WHEELS FOR INSPECTION DRIVING ON BENT OR CRACKED WHEELS IS A HAZARD SINCE THEY COULD FAIL AT SPEEDS - THERE IS NO WARNING OR SYMPTOMS UNTIL THE LOW AIR LIGHT COMES ON

Incident Sep 5, 2023

The contact owns a 2019 Chevrolet Corvette Convertible equipped with Michelin Tires, Tire Line: Pilot Super Sport ZR, Tire Size: P285/35/ZR20, DOT: (N/A). The contact stated that while driving at an undisclosed speed, he heard an abnormal sound outside of the vehicle and the vehicle started to shake abnormally. No warning light was illuminated. The vehicle was taken to the dealer where the tires were inspected and it was determined that the rear driver’s side inside tire sidewall was split, and all four tires were warped and needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 6,000.

Incident May 8, 2023

Transmission shuttering/noticeable vibration while cruising. Dealer replace transmission fluid and shuttering resolved. However, upon initial 1st and 2nd gear engagement on the first drive of the day, the transmission hesitates and aggressively lunges forward at a higher speed than anticipated. Not safe, normal or desirable. This is a known problem that the dealer knows about but what is the resolution/fix to the issue? No warning lights have been displayed.

Incident Nov 4, 2022

I purchased this 2019 corvette grand sport on 3/6/2023. After I had driven it a little over 300 miles the tire statred to lose air (got a low air pressure warning). Filled it with air and got another warning again. Took the wheel off the car and inspected tire and rim. Found a weld repair had been done with another crack in the rim that look like someone tried to repair that crack. No I'm stuck without a car to drive.

Incident Mar 6, 2023

ON 12/30 HAD A TIRE LOSING AIR VISITED DISCOUNT TIRE TO SEE IF TIRE HAD A LEAK THE SHOWED ME 2 CRACKS ON THE ACTUAL WHEEL. Discount tire stated my wheel must be replaced. I HAVE READ ON VARIOUS CORVETTE FORUMS HUNDREDS OF C7 OWNERS WITH THE SAME ISSUE THE WHEELS APPEAR TO DEFECTIVE. I WENT TO DEALER AND PURCHASED NEW WHEEL FOR $1100 FOR ONE WHEEL I CONTACTED GM TO TRY TO GET REIMBURSED AND THEY SAID NOPE!!! THERE IS A CLASS ACTION LAW SUIT STILL PENDING

Incident Dec 30, 2022

ON 1/10/23 I VISITED DISCOUNT TIRE AT 520PM MY DRIVER SIDE REAR TIRE HAS HAD A SLOW LEAK FOR 2 DAYS SO I WAS GETTING THE TIRE CHECKED OUT. THE TECH CALLED ME OVER AND SHOWED ME A CRACK ON RIM HE SPRAYED WITH SOAPY WATER AND IT BUBBLED HE SAID YOUR TIRE IS FINE THE LEAK IS COMING FROM YOUR CRACKED WHEEL I CALLED MY LOCAL DEALERSHIP AND THEY STATED THEY WILL GET BACK WITH ME. I HAVE READ HUNDREDS OF COMPLAINTS ON CORVETTE FORUMS WHERE OWNERS ARE HAVING THE SAME ISSUES.. GM SELLING DEFECTIVE WHEELS...... EVEN A CLASS ACTION LAWSUIT STILL BEING SETTLED.

Incident Jan 10, 2023

I have 32,800 miles on my 2019 Corvette Grand Sport. Each year during my annual service, I have had to have wheels repaired that were bent. Today, during my regular service, both of my rear wheels were identified as cracked and must be replaced. Cracked wheels on the 2017 to 2019 Corvette Grand Sport and Z06 models is a significant safety issue and needs to be addressed by your organization. GM should be forced to replaced all of these poorly engineered wheels before someone is killed or injured in an accident when the wheels fail.

Incident Dec 21, 2022

The contact owns a 2019 Chevrolet Corvette. The contact stated that on several occasions, the tires started to deflate without warning. The contact then stated that he noticed that the rear driver’s and passenger’s side rims had started to crack. The vehicle was taken to the dealer where the contact was informed that the driver’s and passenger’s side rims needed to be replaced; however, the contact was referred to Rim Pros where the rear driver’s and passenger side rims were replaced; however, the failure recurred. The contact stated that after several days the tires started to deflate and the vehicle was taken back to Rim Pro where the rear driver’s and passenger’s side rims were replaced; however, the failure recurred. The dealer was notified of the failure and the contact was informed that there was no recall for the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 14,500.

Incident Dec 19, 2021

Rear Wheels cracked begot flat tire

Incident Nov 28, 2022

My corvette developed a cracked wheel. We took it to the Dealership that put new tires on a week ago because the low air alarm came on. They informed me the wheel was cracked and denied damaging it when putting on the new tires. “It just happens” was their claim. Now we learn there is a class action lawsuit because so many generation C7 Corvettes are suffering unexplainable wheel failures. GM is denying warranty claims and it’s costing the car owners thousands of dollars to replace wheels. The wheel I need is going to be $1200 and will likely be yet another OEM wheel prone to the same problem. Should this not be something in your agencies purview to investigate?

Incident Nov 10, 2022

The contact owns a 2019 Chevrolet Corvette. The contact stated that while the vehicle was at the dealer for all four-tire replacement, the dealer informed him that all four rims were warped and needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure and informed the contact that the failure was due to driver habits or road conditions. The failure mileage was approximately 16,000. The VIN was unavailable.

Incident Aug 30, 2022

My factory wheel cracked in two places while traveling to the Corvettes at Carlisle event. I have a little over 18000 miles on my car at this point. I have taken great care of my car and have not hit and rough potholes or obstacles in the road. I have not “tracked” my car either. I have read about many other Corvette Z06 and Grand Sport owners who have suffered the same cracked and bent rim issues with the stock GM supplied wheels. Apparently the wheels are faulty as reported by hundreds of dissatisfied owners. The cracked wheels fail to hold air pressure causing a safety situation while driving at highway speeds. I understand that there is a current class action lawsuit in progress. I feel that GM should stand by their product and replace these inferior wheels with safer, more sturdy ones..especially for the price we paid for the vehicle. At this point, the consumers need the NHTSA to help us with this situation as GM has refused to accept any responsibility at this point. They blame the consumer’s driving habits as a reason for the issue….not the obvious faulting manufacturing of the wheel. I appreciate your attention to this matter and look forward to hearing your response. Sincerely, [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Incident Aug 25, 2022

Vehicle : 2019 Grand Sport Corvette Here’s what happened On or about Oct 14, 2021 I was driving on a multi-lane highway in an 50 mph zone, when the following occurred: -brakes suddenly slammed full-on, then immediately released …e.g., on/off in 0.25 of a second -windshield-wipes made one swish across the windshield -dashboard switched over to night mode -hands-free phone button lights on steering wheel turned off and would not function -hands-free phone function on display screen would not function properly -false maintenance warnings appeared on dash-display e.g. have rear axle checked and have restraint system checked -I stopped the car and turned it off. When I restarted the car everything was normal again! Note: this car does NOT have any automated braking systems. GM Canada and the GM Dealership have been unable to determine the cause of the above incident nor duplicate in during road-tests.

Incident Oct 14, 2021

Both rear wheels bent. No damage to tires. Damage caused by normal driving on surfaced roads. Several unmarked bridge transitions and minor potholes. Damage detected when wheels were checked with laser on Hunter Road Force balancer. Front wheels were OK.

Incident Apr 2, 2022

The contact owns a 2019 Chevrolet Corvette. The contact stated that while driving at various speeds, the low tire pressure warning light would illuminate on the instrument panel. The contact stated that she added air to the tires however, the low tire pressure warning light remained illuminated. The contact had taken the vehicle to an independent mechanic where they diagnosed the cause of the failure as cracks in the rear passenger’s and driver’s side wheels. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 10,000.

Incident Feb 1, 2019

2019 Corvette Grand Sport August 2021 - Driver side rear wheel cracked losing pressure rapidly making continued driving dangerous. Instructed by a local dealership to drive at minimum speed to the dealership to prevent the degradation and potential catastrophic failure of the wheel and/or tire. Drove to a local dealership where the wheel was inspected and confirmed to be cracked. Wheel was replaced with a new OEM GM Corvette wheel. January 2022 - Passenger side front wheel cracked losing pressure rapidly making continued driving dangerous. Immediately drove the vehicle home and parked it until I could confirm the problem. Have not driven it since and will being the process of replacement within the week (01/30/2022).

Incident Jan 30, 2022

The contact owns a 2019 Chevrolet Corvette. The contact stated while driving 65 MPH, the passenger’s side rear tire low-pressure warning light illuminated. The contact stopped at a service station and added air to the tire and proceeded to drive however, the warning light illuminated again. The contact took the vehicle to a local tire shop who inspected the vehicle and diagnosed the failure as a cracked rim. The contact took the vehicle to the local dealer and it was confirmed that the rim was cracked. The rim was replaced. The contact stated that several months later the failure recurred on the driver’s side rear wheel. The contact took the vehicle to AutoNation Chevrolet Valencia (23649 Valencia Blvd, Santa Clarita, CA 91355, (661) 200-9107) and it was determined that the rim was cracked. The rim was replaced. The contact was concerned that the failure would return. The manufacturer was made aware of the failure. The failure mileage was approximately 17,000.

Incident May 25, 2021

The contact owns a 2019 Chevrolet Corvette. The contact stated that while driving at 25 MPH, the low tire pressure warning light illuminated. The contact stated that he added air to the tires however, the low tire pressure warning light illuminated again. The contact stated that he then took the vehicle to an independent mechanic who diagnosed the failure as a driver's side rear cracked rim. The vehicle was not repaired as he was waiting to transport it to the dealer. The manufacturer was notified of the failure and advised the contact to take the vehicle to a Chevrolet dealer for diagnosis. The failure mileage was 6,500.

Incident Nov 24, 2021

During routine service at my Chevy dealership, both passenger side wheels were bent (out-of-round), requiring repair, at 20,793 miles. This is the send time the passenger rear wheel was found to be bent, requiring repair.

Incident Oct 26, 2021

The contact owns a 2019 Chevrolet Corvette. The contact stated while driving 45 MPH, the RPM decreased to 1,200 and the vehicle started to shudder and shake. The contact was able to continue to drive the vehicle to the residence. The contact took the vehicle to a local dealer to be inspected. The dealer performed a transmission flush to fix the failure however, the failure persisted. The contact took the vehicle back to the local dealer who inspected the vehicle and diagnosed the vehicle with 3 bent wheels. The wheels were not replaced. The manufacturer was not made aware of the failure. The failure mileage was approximately 4,399. Per the dealership, the bent wheels are not covered under warranty and the problem is the result of normal wear-and-tear. However, I found numerous complaints on the internet stating GM made the wheels with inferior material that is "cast, rather than forged, and is of insufficient strength to withstand the torque and power input from the drivetrain," I am now scared to drive the car because the bent wheels or a safety hazard and will more than likely start to crack which could result in causing a wreck. At this time the only way to correct the failure is to purchase new wheels if I wish to continue to drive the car and prevent from being a safety hazard or causing a collision.

Incident Oct 7, 2021

The front rims are bent

Incident Oct 15, 2021

OEM wheels fail. Thousands of online reports of 2015-2019 Corvette C7 Grand Sport and Z06 models wheels cracking without incident. My wheel is available for inspection. Safety was risked by having a wheel crack, loose air pressure and fail under normal operating load, potentially causing a crash. This issue has been reported to GM, has countless incidents also reported and can be easily confirmed at any dealer. My vehicle is currently at the dealer and has been inspected by their professionals. No symptoms prior to failure. No other damage has been noted or reported by the dealership to this wheel or tire.

Incident Sep 28, 2021

Vehicle has 6900 miles on it, started to vibrate badly while driving on highway. Car has not been in any accidents and carefully driven. Dealer says the two rear wheels are bent.This could lead to cracking of wheels and/or loss of control of the vehicle. Vehicle is still under 36 month/36,000 mile bumper to bumper warranty. GM will not cover cost to replace and assumes no responsibility.

Incident Sep 12, 2021

Bad smell of gas while parked in garage. Looked underneath and was leaking fuel. Looked online early c7 corvette 15-18 has a special recall for the fuel receiver and tank because it was leaking. Gm actually extended one of the warranties because of it. Brought my car to the dealer and said it's not covered under the extended warranty that gm gave. I was 18 days out of my bumper to bumper 3yr 36k miles and gm agreed to pay 90% and me 10%.

Incident Sep 14, 2021

The rim cracked from the outside edge and progressed until air begin to leak. The dealer will not replace the rim unless you bought a tire and rim policy. But the manufacture of the tire does warrantee the tire and the dealer knows that to be the case. So the dealer knows the rims are the problem. I have researched and many others have the very same problem with their Corvette rims cracking until air is lost. These rims are definitely improperly designed and they should be recalled.

Incident Aug 3, 2021