Engine And Engine Cooling Problems of Chevrolet Tahoe - part 1

1) the engine failed and lost propulsion while driving. It is currently at the dealership where I purchased the vehicle new, so it may be available for inspection upon request. 2) my safety was put at risk because the vehicle lost propulsion while driving. This is a dangerous situation in general. In my case I was able to pull over safely and have it towed to the dealership. 3) the problem is that the engine failed. This can be confirmed by the dealership. 4) this 6. 2l engine was part of the n252494001 recall for specifically the issue of engine failure and loss of propulsion, so it had been inspected by the dealership recently. I brought the vehicle into the dealership for this recall several months ago. Per the recall, they told me that the engine would need to be replaced if it didn't pass the inspection. They performed a pico test, informed me that it passed the test, and changed the oil to 0w-40. It has not been inspected by gm, the police, insurance representatives or others at this time. 5) there were no warning lamps, messages or other symptoms of the problem prior to the failure.

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Since March of 2025 I have identified a critical safety defect with my vehicle. When driving and without warning, the vehicle unexpectedly shifts to neutral, experiences a loss of propulsion, and the engine shuts off. This has occurred multiple times in which I narrowly escaped collisions with other vehicles or objects. If this would occur at a high rate of speed, it would certainly result in serious accident including possible fatality. I have experienced three near-accident scenarios when I had children in the vehicle. I have worked with classic Chevrolet in sugar land, texas who has made six attempts at repair. They have each time found a different component attribute to an error code and replaced that part. After each visit they tell me that the car is fixed and safe to drive. They have never been able to provide a clear explanation as to why I am experience this reoccurring issue, but attribute it to a different part each time. Within 5 days to 2 months, the incident repeats. I have recent video of the incident that I can share. Chevrolet customer care has been minimized my concern and informs me that their service staff has found the vehicle to be fully operational and safe to operate. I have spent over $6,000 in failed repairs. I do not feel safe operating this vehicle. That list of repairs includes: March 7, 2025 - battery replacement March 28, 2025 - DC/DC power converter April 22, 2025 - ecm updates January 8, 2026 - •throttle body replacement •serpentine belt replacement •engine air filter replacement •transmission fluid flush •coolant fluid flush •fuel injection cleaning •hydrogen carbon cleaning service January 23, 2026 - power control module (recall) January 30, 2026 - rear differential system replacement March 10, 2026 - • replacement of the high-pressure fuel pump • replacement of the DC power supply converter • hydrogen carbon cleaning service I can share all invoices. Chevy is not taking this matter seriously. Please support.

See all problems of the 2021 Chevrolet Tahoe 🔎.

On March 14,2026 I was driving 80 mph on the interstate and the vehicle shifted to neutral and shutoff. Shortly before that the vehicle revved to 4000 rpm and you could feel rhythmic vibrations. The vehicle was towed to a chevy dealership and diagnosed as loss of propulsion needing a new engine. Tahoe had 104,000 miles at failure.

While driving down [xxx] the car started making a weird noise as we slowed down for an upcoming light. The light changed and as we started to drive again the check engine light came on and I lost power steering. I was trying to navigate the car off towards the shoulder but the car was hard to maneuver, but was able to move into the right lane. I had to drive the car slowly as to not stop the engine propulsion and stalling. But had no luck once we reached the intersection on [xxx] and [xxx] . At this point the car just died. Nothing was working. Hazard lights didn’t even work at one point. This situation left me and my family in the middle of traffic on a busy highway road. The only thing we had in our favor was the car stoped right at a red light so traffic would have to slow down every so often to the stoplight. We had to have the car towed off the road at around midnight and they took it to the dealership. The engine had a complete failure (found out after the dealership took apart the engine). The email stated: a further oil sample confirmed excessive metal throughout the engine at this point we proceeded with disassembly to identify the source of the failure. After removing the oil pan and inspecting internal components, we found internal engine damage. Specifically, the connecting rod bearing on cylinder 5 had failed, causing significant scoring to the crankshaft, camshaft, and related engine components. The engine has experienced a major internal failure due to the failed rod bearing, resulting in internal damage. Because of the severity of this condition, internal components are not serviceable individually. So the engine replacement would be required. This car is only 3. 5 months old, and other than a safety switch that was a manufacture issue we had to have fixed there were no other warnings my engine was going to die and leave me in the middle of the road. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The vehicle shifted itself into neutral and shut off while driving. It happened twice in three days. The first time I was pulling into the driveway so I was able to put it in park and restart the car safely. The second time I was in the middle of traffic in tampa and it shifted into neutral and shut off in the middle of the road. Luckily no cars hit me but again I had to apply the break , restart the car and put it back in drive. This was very scary and I had my kids with me. Earlier in the day I had been driving on 75 and if it had happened then it could have been a bad wreck. It shows there are no current recalls on my vehicle. No warning lights or messages appeared. Vehicle was purchased less than 30 days ago. I will contact the dealership to verify there are no open recalls just in case but again when I checked I found none.

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Total engine failure.

The contact's wife owns a 2022 Chevrolet Tahoe. The contact stated that while driving approximately 50-60 mph, several unknown warning lights illuminated. The driver pulled over to the side of the road. The vehicle failed to restart and was towed to the dealer, where it was diagnosed and determined that unknown engine valves had collapsed, and there was possible camshaft damage. The contact was advised that further diagnostic tests were required. The dealer informed the contact that a recall should be issued for the failure. The vehicle was not repaired. The manufacturer was notified of the failure, and the contact was referred to the dealer for assistance. The failure mileage was approximately 68,000.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at various speeds, the forward collision avoidance message was intermittently displayed. The vehicle was taken to a dealer, where a computer module was replaced. While driving at various speeds, there was an intermittent knocking sound coming from the engine, with the check engine warning light illuminated. While driving at an undisclosed speed, the knocking sound became constant. The vehicle was driven to the dealer, and upon inspection, the mechanic discovered a bent engine rod inside the engine. The vehicle was diagnosed with engine failure, and the contact was provided an estimate for the repair. Upon investigation, the contact discovered the failure was associated with NHTSA campaign number: 25v274000 (engine and engine cooling). The manufacturer was initially notified of the failure through the dealer, and the contact was later informed that the manufacturer agreed to cover half the cost of an engine replacement. Upon calling the manufacturer directly, the contact was referred to the NHTSA hotline to report the failure. The vehicle was not repaired and remained with the dealer. The failure mileage was approximately 72,000.

The contact owns a 2026 Chevrolet Tahoe. The contact stated while driving 70 mph on the freeway, while depressing the accelerator the vehicle shut off unintendedly. The vehicle was coasted to the right side of the roadway. While attempting to restart the vehicle, the vehicle failed to respond as intended. A dealer was contacted. The vehicle was towed to the dealer and was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 3,783.

The contact owns a 2024 Chevrolet Tahoe. The contact stated that while driving at 76 mph, the vehicle was driving abnormally rough. The rpm increased, and the message to shut-off engine and restart the vehicle was displayed. The contact stated that the failure occurred while the two minor children and their friends were inside the vehicle. The contact's daughter stated that the vehicle was in neutral after leaving the car wash. In addition, the failure occurred while driving on a busy two-lane highway. The vehicle was almost involved in a crash twice when the engine seized in the middle of the left lane. The contact stated that while attempting to drive the vehicle to the shoulder of the road, the engine seized. The contact stated that while attempting to start the vehicle, the vehicle failed to restart. The local police assisted with traffic control. The vehicle was towed to the dealer; however, the failure was not duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The dealer was informed that the mobile app indicated a transmission and engine failure. The dealer informed the contact that because the engine seized, the engine needed to be replaced. The dealer informed the contact that there was no indication of what caused the engine to seize. The manufacturer was made aware of the failure but provided no assistance. The contact referenced an unknown recall with a similar description; however, the VIN was not associated with the unknown recall. The contact was advised to contact the NHTSA hotline to report the failure. The failure mileage was approximately 16,988.

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I backed out of my driveway put it in drive stepped on the gas and the car hesitated and just shut down. Steering wheel locked up I had no time to even stair it out of the road. Try to start it and would not start but the dash and radio would come on. Tried to get in neutral to get it out of the road but everything is electronic so we could not do it. We had to have the car towed to the closet dealership. It took them two weeks to even diagnose the problem working along side gm service. Two weeks could have been saved with gm knowing they had a bulleting and problem with the lzo 3. 0 duramax diesel motors. It is not week 5 I still do not have a car and they have not even started putting the new motor in. Gm has not been helpful at all! it has been a miserable 5 weeks. They told me I could rent a car myself with a cap of $44 per day with all taxes and fees included and I may be reimbursed. So I have to put the money out of my pocket first and they may reimburse me. At this point I would be already out $1540. 00 which is not in my budget. I purchased a brank new 2025 chevy Tahoe 3. 0 duramax diesel motor car and it only has 8k miles on it and the motor is blown. I also paid for the car in full. I have asked gm numerous times to tell me where I went wrong and they have no answers as usual. It has been a horrible experience to this point and I have no idea when it is going to end. The dealership is trying to tell me that my car would not have dies going at higher speeds. I am so luck it happened in my neighborhood and not while on the highway. I could have been killed!.

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At 64000 miles my 2019 chevy Tahoe has to be replaced due to lifters failing. Gm/chevy wants to charge me $17000 to install a new 6. 2l - v8 engine. (same engine that had the lifter problem). That engine has been recalled on earlier and later models. What do I do to fight the cost of new motor ?.

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I was driving when I noticed my vehicle lagging and possibly misfiring, and then the "service four-wheel-drive" warning appeared. I was just down the road from my house, so I pulled into the driveway and put the car in park, but it wouldn’t turn off. I realized the parking brake was engaged and wouldn’t release either. I was stuck in two-wheel drive and couldn’t switch to four-wheel drive, and the emergency brake wouldn't disengage when I pressed the button, so the vehicle still wouldn't shut off. I had to put it in reverse physically step on the gas, which is the only way the parking brake finally disengaged and allowed the vehicle to shut off.

Exhaust fumes and carbon monoxide are entering my cabin. I have replaced exhaust manifold gaskets (both sides), exhaust manifolds, exhaust manifold donut seals to the y-pipe and I still get carbon monoxide entering cabin giving my headaches. Please help.

See all problems of the 2017 Chevrolet Tahoe 🔎.

The vehicle motor goes out with no indication that anything’s going to happen. It does this a different stages of miles. Mine happened when I was passing someone on the high way. It just shut off.

While driving on the highway, the vehicle suddenly downshifted and shut down and would not restart. All lights appeared on the cluster and showed "conditions not correct for shift". Had to have vehicle towed from the side of the road and wasn't even able to shift into neutral.

Our vehicle passed their inspection required test for the engine recall and then at an intersection just died with absolutely no warning and wouldn’t even start again. Warning light for low engine oil came on. We were stuck and couldn’t even put the vehicle in neutral to be towed out of the intersection. Had to call a flat bed tow truck to load it and take to dealership where it was confirmed the engine failed!!! police did show up at the scene to facilitate traffic and the loading of th vehicle.

I took my 2023 chevy Tahoe in for all recall corrections promptly when the notices were received. My last recall was to run a check to see if my motor was one of the defective 6. 2l engines. It was determined it was not and the dealer changed my oil to the new required 0w-40w. Now a month later as I am accelerating on to the freeway ,I am at 65 mph I cross traffic to merge on to a connector bridge and my car rpm's go through the roof and the car starts to slowly lose power. Zero warning lights are on at this point just decreasing power. As I am on the bridge my engine light comes on with a engine oil hot idle engine notice I am now at 35 mph. Then a oil pressure low turn vehicle off notice comes up and we are at 15 mph the car turns off. The screen says press start again but as we do it wont do anything. It then randomly starts turning off and on. We got to a point on the bridge where we could coast to the connecting freeway below and pull over. My car was towed to the dealer where it has been confirmed it needs a new motor with no know eta of the new motor.

Driving down i495 in mass when engine stopped with no warning or prior symptoms. My wife and 4 children (including 2 friends of our kids) were in the car. Luckily we were able to safely pull to the shoulder after coasting through a construction zone. If we hadn’t made it to a safe piece of shoulder chances are high that another vehicle would have hit our vehicle and hurt and killed us. These 6. 2 engines are a serious safety hazard and I only hope my new engine proves to be reliable. Car was towed to dealer who diagnosed it as a seized motor. Car is a 2022 chevy Tahoe with the problematic 6. 2 engine. Engine had passed Chevrolet’s pico test as per the 6. 2 recall about 7,000 miles before it seized. Vehicle and engine dealer maintained with all required changes/maintenance. Engine seized/failed with no warning.

My 2021 Chevrolet Tahoe engine seized while I was driving on the highway. All I heard was a loud clunk then there was a sudden power loss while I was driving before I could even get to the side of the road. I had to pay, out of pocket, to get a tow because the vehicle failed to crank or start. I had the vehicle towed to the chevy dealership in paramus, NJ just to find that this is a known recalled issued with the 5. 3l, v8 engines which is the engine my vehicle has. There seem to be problems specifically regarding defective connecting rods or the crankshaft but for some strange reason my vehicle's VIN number is not included in this recall although it is the same year, same vehicle, same engine and same problem. My vehicle should be included in the recall so it can be repaired for free at the chevy dealership in paramus, NJ as I use this vehicle to transport children and that is very unsafe to have this defect and not fix it for free when it is not the fault of the driver.

*total engine destruction from thrust bearing failure (gm bulletin 25-na-307) * yes, failure has been confirmed at chevy dealership (davis Chevrolet gainesville FL) * yes, problem has been reproduced at dealership *only the dealer service department has confirmed failure warning lights, thrust bearing failed sending shrapnel into the bell housing torque converter just loud metal clanging noise from bellhousing area knows of the problem but will not recall just handling them at dealerships as they fail this happened in an isolated area it would have left us stranded in the middle of no where * I am awaiting the service order from the dealer in pdf form and can send upon request! for now I have a 4 month old $90,000 Tahoe in the shop waiting on an engine!.

While driving home late at night, the vehicle experienced a sudden mechanical failure in the engine. I was traveling approximately 2 miles per hour while slowing to stop at a stop sign when there was a loud “clunk,” followed by an abrupt stop of the vehicle. Immediately after this occurred, multiple dashboard warning lights illuminated, and a knocking sound began coming from the engine. The vehicle is currently not operating normally and is available for inspection upon request. This incident occurred late at night while I was driving with my two young children in the vehicle. The sudden and unexpected stop put us at risk of being rear-ended or stranded in an unsafe location. The loss of normal vehicle operation created a dangerous situation, especially given the time of night, location, and the presence of my children. There were no warning lights, messages, or noticeable symptoms prior to the incident. All warning lights illuminated only after the loud clunk and abrupt stop occurred. The knocking sound from the engine began immediately following the failure. I now am in a rental car that costs $700 a week that my insurance doesn’t cover.

I was driving down I-5 at 75mph and the truck shut off while driving. Couldn’t get to start. Paid over $1k for a new battery cause dealership couldn’t replicate problem. Next day doing 75mph on freeway engine through a rod.

Dealer checked the 6. 2l motor for known defects. It "passed" inspection on 11/20/25 and got the thicker oil (ow-40). The engine lost propulsion ("died") 3 times on a 55mph state highway on 02/09/26 with my 4 year old in the car with me. It died and came to a complete stop in one lane and would not re-start initially with cars almost rear ending us and needing to aggressively swerve to avoid hitting us. After 4 or 5 attempts it started again (making terrible grinding noises) so I could get it off the road before it died again. It started again to drive home on the back roads approximately 1 mile. Low oil pressure and check engine lights came on. I also received notifications from onstar and from the my chevy app that there were severe motor or transmission problems. I scanned it with an obd ii scanner and it has code p00016 (camshaft position correlation - bank 1 sensor a). It got towed to the dealer and is now confirmed it is in need of a full motor replacement less than 3 months after they told me the motor passed inspection! this is not acceptable. To be told it's fine and then have it fail with my child in the car is extremely unsafe. Now I'm stuck trying to get a comparable loaner vehicle from the dealer to drive in the snow and mountains with my family safely while they expect to have the vehicle at minimum of 6 weeks. So far they have not found a loaner potentially putting my family in further danger by not having a 4x4 vehicle in a snowy climate.

My truck was driving perfect and I went to pull into a parking lot in arkansas where I live in long story short it started acting funny trying to idle out and then I heard a knocking noise. It happened twice. Then my service esv light come on next my motor light come on then my auto for a collision system failure light come on. It’s on the dash anyway my vehicle is not running around. It has hardly no power and I smell something under the hood from time to time burning it’s kinda like an electrical smell. I’m not sure. I’m not a mechanic. I’m a [xxx]. I’m a [xxx]!!! but I have to have a way back back-and-forth to work and I cannot drive this vehicle. I have been driving it to work and just straight to home and that’s only like a mile from the shop but I need a replacement vehicle I need to sell mine at wholesale value as you guys said you would that would be greatly appreciated. God bless you guys. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The contact owns a 2023 Chevrolet Tahoe. The contact stated that the vehicle was repaired under NHTSA campaign number: 25v274000 (engine and engine cooling) in November 2025 by the local dealer. The contact stated that the engine had passed the inspection, and a higher viscosity oil had been added along with the other steps stated in the recall. The contact stated that while driving approximately 55 mph, the accelerator pedal was depressed; however, the vehicle failed to respond. The gear shift indicator indicated that the transmission had been shifted into neutral(n). The contact attempted to shift to drive(d) when the vehicle stalled. The vehicle was stopped but was unable to restart the vehicle. The vehicle was towed to the same dealer who had completed the recall repair. The dealer diagnosed the vehicle and determined that the engine, starter, radiator, and fuse block needed to be replaced. The vehicle was being repaired. The manufacturer was informed of the failure and a complaint was filed. The failure mileage was approximately 48,000.

I took the vehicle in for the engine recall. They put in the higher viscosity oil. Shortly thereafter the engine failed. They are trying to claim it's not related to the recall issue.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving and attempting to slow down to approximately 35 mph, there was an abnormal clunking sound coming from the vehicle. The contact believed that the sound was caused by ice buildup on the mud flap, but shortly afterwards, the engine revved unexpectedly, with the check engine warning light illuminated, and the message “reduce acceleration - drive with care” was displayed. The vehicle started to coast unintendedly. The contact stated the vehicle returned to normal operation after a short while. The vehicle was taken to a local dealer to be diagnosed. The mechanics pushed the vehicle out of the parking spot before inspecting the vehicle. The vehicle was diagnosed with transmission valve body failure. The contact was informed that the transmission valve body needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and referred the contact to the NHTSA hotline to report the failure. The approximate failure mileage was 88,342.

To NHTSA, I am reporting a serious safety defect in my 2023 Chevrolet Tahoe purchased from criswell Chevrolet (gaithersburg, MD). Defects include a documented brake system failure while driving and repeated electrical/shift faults preventing shifting out of park. The issue is ongoing even after the dealer/manufacturer stated it was fixed. Key events: Feb 3, ~12:45 while traveling ~35–39 mph on a five?lane road, brakes failed. I slowed by coasting uphill and using maximum pedal force to ~5–7 mph before stopping. I have video of the incident and two other times this has happened with pictures as the car was in park. Three prior start-up incidents: all dash lights illuminated (including brake failure and forward collison system unavailable); vehicle stuck in park. First required towing; dealer could not replicate despite reported stored codes. Subsequent event stranded my family. I have notified Chevrolet and the dealer; their offer does not address safety or recurrence. Please record this complaint, assess broader risk, and advise on related recalls/investigations. If there is a path forward to ensure the safety of my family, please respond with that guidance. My phone number is [xxx] . Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Unknown, vehicle starts to jerk when shifting gears. Jerks when breaking and when accelerating. Check engine light on. I see there is a prior recall for the same issue on same year as mine.

See all problems of the 2018 Chevrolet Tahoe 🔎.

1st issue: 9/2025, after driving from another city to my home at 55-75 mph. As I pulled up home, the car just stalled and wouldn't start. I googled issue to find out it was a commonly known issue by gm. If fuel pump control module had happened while driving faster and not on my street to roll up to curb. I would have or could have been deadly. I find out what part # and local dealer knew there was a recall but told me he never heard about it and charged me for part. I installed in front of home on street and have been trying to get money back after reporting to gm I repaired my fuel pump control module and have been trying to get my money back from a repair done on 9/29/2025 by me. Gm says it's looking into still after I keep calling them on status of this notice. I still have old part. I have filled out all reimbursement forms. 1st the danger of it failing and now no money. By the time engine light comes on you have no power for any stopping or steering. #2 engine 2021 Tahoe high country 6. 2 l no recall has been sent. Gm has known about an engine that has multiple failure issues that could get you in a serious accident/death by just stop running, while just driving at any moment, internal failures and main seal leaks, more! mine just poured oil out on driveway after driving 6 miles to church and back. This will be the largest and most deadly auto issue in history. They even had dealers now with any on lot with this engine a stop sale order. Aprox. 800,000 of these engines are out there, local gm dealer says there is no recall. 2021 to 2026 and they have only changed out aprox. 2800 engines and telling me mine sitting in driveway is not on recall. Bs. These engines are in their high-end trucks, SUV's, escalades. Someone needs to get gm to do what's right and replace with new engines. That have been tested, all issues before someone has to die. Trying to keep silent on internet is sad. Yes its going to cost billions. But to keep customers safe and not scared.

Was driving approximately 45mph and the truck just slowly powered down and "engine power reduced" and eventually cut off and wouldn't crank back up. Got it towed to the Chevrolet dealership and was told the engine has to be replaced due to the bottom of the motor and the crankshaft in cylinder one. Was told it would be 17k to repair it.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while his wife was driving out of the driveway and driving approximately 20 mph, the driver became aware of an abnormal flapping sound that became louder as the vehicle accelerated. Additionally, the contact stated while his wife was driving approximately 60-65 mph on another occasion, the check engine warning light illuminated. The driver pulled over to the side of the road. The vehicle was towed to the residence, where a mobile independent mechanic diagnosed the vehicle with a misfire in cylinder #8. The mechanic determined that both sides of the engine lifters, the gaskets, and other unknown parts needed to be replaced. The vehicle was not repaired due to the cost. The dealer and the manufacturer were not contacted. The vehicle warranty company was contacted and informed the contact that the vehicle was not covered under warranty. The failure mileage was approximately 93,000.

My car has a problem this will be the 3rd visit to the chevy dealership and the 6th time in a garage. At this time, the original alternator that came with the Tahoe, was running high through December and replaced with a new alternator from parts geek. It was ok for a couple weeks and is running high again. You cannot test it from a cold start to get this reading. It must be ran for at least 20 min. After a certain amount of time the battery gauge will move to the highest point, the warning lights of abs, traction control, stabilitrak, trailer brake light, battery light (first time on 1/27/2026 for battery light), loss of drivers assist on 1/26/2026, tire pressure light, car dies coming to a stop sign. I can’t turn it back on for at least a min. I’m stuck inside with zero power, can’t unlock the doors to get out to direct traffic, open windows or put on 4 ways so I don’t get smacked in the middle of the road. After that minute I heard a click (no key in ignition, not trying to start) and then the dash lights started coming back on again and I started it. The battery did not restart the time on the radio screen so I’m assuming I didn’t die fully. The radio screen always goes black first, then the heat goes in and out, the warning lights come on and it dies. Takes a minute or so to be able to start it again and the lights aren’t on anymore but will continue to do the same shit after awhile of driving and now daily. I’m afraid to drive it anywhere since almost getting stuck inside and plowed at an interaction. I have reached out to chevy about this problem and was referred to take it back to the dealership again, and to reach back out as soon as it’s there to open a case on the issue. Ive had it, this has been ongoing for a year, and I have to keep paying for things that doesn’t fix the issue and it’s getting worse.

Driving on the new jersey turpike I passed through the ez pass tolls traveling west bound on bayview Ave bridge, the vehicle shut off without warning. No check engine light or noise, just no propulsion or anything. Dead in the water. Vehicle would not restart.