Owner-reported complaints naming the engine system, filed with NHTSA
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Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components. Every record below is an owner-reported complaint about the 2020 Chevrolet Silverado 2500 submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 14 reports on file name it.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Shown in the owner’s own words, exactly as filed
2020 3.0 diesel duramax sucked in the antifreeze and caused a hydrolock. The dealer says that it is not covered under warranty since the engine was over 100k miles. They did offer a new engine for $30K which I declined. The truck was always well taken care of and only received the best in all products
The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving approximately 45 MPH, the check engine warning light illuminated. The vehicle was taken to the residence. The vehicle was then taken to a dealer, and DTC: P133X (Cylinder X Glow Plug Failure) was retrieved. The contact was informed that the Glow Plug needed to be replaced and reprogrammed. The vehicle was repaired, but the failure reoccurred with a different Glow Plug five months later. The vehicle was taken to a dealer to be diagnosed, and it was determinedthat Glow Plug #3 had failed, and DTC: P0673, P0607, and P133A were retrieved. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 50,616.
The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving at 50 MPH, the vehicle went into LIMP Mode. The check engine warning light illuminated, and the messages "Service Emission System”, “See Owner's Manual", and "65 MPH Max Speed" were displayed on the instrument panel. The vehicle was taken to the dealer, where it was diagnosed, and determined that the diesel exhaust fluid gas tank connector terminal had overheated, and the gas tank and the wiring harness needed to be replaced. The vehicle was not repaired due to the cost. The vehicle remained at the dealer. The contact associated the failure to the Global Warranty Management: N212342980. The manufacturer was not notified of the failure. The failure mileage was 173,794.
The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while driving at an undisclosed speed, the rear wheels locked up momentarily. The check engine warning light was illuminated. The vehicle was previously taken to the local dealer to be repaired under NHTSA Campaign Number: 24V797000 (Power Train). The vehicle was repaired, but the failure recurred. The manufacturer was contacted, who confirmed that the recall repair was a one-time free repair, and no further assistance was provided. The failure mileage was approximately 188,000.
I am writing to express my serious concern and frustration regarding the unresolved recall on my 2020 Chevrolet Silverado 2500 (VIN: [XXX] ). Despite multiple visits to multiple dealerships, I was repeatedly told that the necessary parts to complete the recall repair were on back order and instructed to “wait for parts.” No interim solution or assistance was ever offered. As a result of this delay, my vehicle broke down without warning, leaving me stranded on the side of the road. This created a hazardous situation and significant disruption to my day. To make matters worse, I had to pay out of pocket to have the truck towed to a repair shop in an effort to get it operational—an expense I should never have incurred given the known recall and repeated attempts to have the issue corrected by Chevrolet. I have been a loyal Chevrolet owner and have always trusted the brand for its quality and dependability. However, this delay and lack of proactive support is causing significant inconvenience and eroding that trust. This situation is unacceptable for several reasons: 1.Safety Risk and Recall Obligation: Chevrolet acknowledged the defect by issuing a recall, yet I have been forced to operate a vehicle that does not meet your own safety standards for months. 2.Repeated Service Attempts with No Resolution: I followed the proper process and visited an authorized dealer multiple times, only to be turned away each time with no solution beyond “wait for parts.” 3.Breakdown and Financial Loss: The vehicle failure and subsequent towing expense are a direct consequence of Chevrolet’s inability to provide timely parts or alternative accommodations. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
I was driving on Interstate 75 in Ohio when the engine suddenly overheated and completely locked up we were pulling my travel trailer camper at the time which we ended up getting off of an overpass and blocking traffic for several hours until we got the vehicles moved Chevrolet did eventually replace the motor and the entire cooling system with what they claim is a new motor in October of 2024, and within the last couple of days I have noticed a smell coming from the engine compartment that was reminiscent about the smell when it locked up I'm afraid they stuck another motor in my truck that has the same exact issues and once it goes out of warranty I'm going to be stuck with another broke down truck
The contact owns a 2020 Chevrolet Silverado. The contact stated that while attempting to remote start the vehicle, the vehicle failed to start. The contact was able to manually start the vehicle however, the message "Service Emissions System - Speed Limited to 65 MPH" was displayed. The contact stated while driving approximately 25 MPH, the "Check Engine” and “Speed Limit 65 MPH" messages were displayed. The contact heard an abnormal sound like air coming from the rear of the vehicle. The contact stated there was thick black smoke coming from the exhaust pipe. The contact returned to the residence. The contact had not taken the vehicle to the dealer or independent mechanic. The vehicle was not diagnosed. The contact had used a handheld scanner and became aware that the Reductant Heater circuits 1, 2, and 3 had short-circuited. The contact checked and observed that the wiring harness located under the vehicle near the fuel tank and the Diesel Exhaust Fluid (DEF) tank had melted. The vehicle was not repaired. The contact had researched online and related the failure to Technical Service Bulletin Number: N202300791 - Service Update Diesel Exhaust Fluid System (Fuel System, Diesel). The manufacturer was informed of the failure. The failure mileage was approximately 131,000.
In 2024, I noticed that my truck was experiencing rough shifts. It felt as if the back wheels were jerking over uneven ground, even though the vehicle was on a flat surface. In November 2024, my sister sent me an article about General Motors' massive recall due to rear wheel lock-up, which increased the risk of crashes. I contacted GM and learned that my truck was part of the recall. I reported the issues my truck was exhibiting, and GM instructed me to reach out to my dealer about the problem. However, I was informed that they did not have the parts to fix the issue and had no idea when they would receive them. I asked GM if they would provide me with a rental vehicle, but they declined, stating that if they offered a rental to me, they would have to provide one for others as well, which was not feasible due to the large number of affected vehicles. I explained that my truck is my daily driver for work, and I frequently transport my grandchildren in it. Driving the truck was hazardous given the issues it was already exhibiting. I was told to contact my dealer, and since my truck was under warranty, they should provide me with a rental. When I requested to speak with a manager, I was informed that they would only reiterate the same information. I then contacted my dealer, Sapaugh GM Country, located at 1435 McNutt St., Herculaneum, MO. I was informed that they do not have the parts. but they did a minor tweak which has caused more damage to my powertrain and engine.
The contact owns a 2020 Chevrolet Silverado 2500. The contact stated that while operating the vehicle, the check engine warning light remained illuminated. The contact stated that the failure was intermittent. The vehicle was taken to the local dealer who replaced the fuel module and fuel tank. The failure eventually reoccurred, and the fuel rail sensor was replaced; however, the failure recurred intermittently. The manufacturer was notified of the failure. The failure mileage was 135,000.
We just arrived to our out to town destination and exited the vehicle. We drove 80 miles to get there. The truck was running when we noticed white smoke coming from under the hood then immediately large red flames.
The contact owns a 2020 Chevrolet Silverado 2500. The contact stated while driving at an undisclosed speed, the steering wheel briefly became tight before returning to normal functionality. After the failure, the temperature gauge indicated that the engine was overheating. The contact also stated that the brake pedal required excessive force to slow and bring the vehicle to a complete stop. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the water pump. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 74,000.
The DEF heater/tank shorted out. The DEF system has thrown a code 3 times in the little over a year I’ve owned the truck. This final time I was told that the tank needs to be replaced. The truck has now been in the shop for 2 months and there is still no ship date on the replacement tank. The tanks are on a national back order. From what I understand there are about 9,000 people waiting for this DEF tank countrywide. I now have a $60k work truck that I am paying for but cannot use with no reasonable end in sight.
AFTER OWNING THE BRAND NEW TRUCK FOR LESS THAN 24 HOURS (APPROXIMATELY 170 MILES ON THE ODOMETER OF THE VEHICLE), I WAS DRIVING IN A STRAIGHT LINE ON A 2 LANE HIGHWAY AT APPROX. 50-55MPH. MY FOOT WAS LIGHTLY ON THE ACCELERATOR, MAINTAINING SPEED, AS I HAD JUST PASSED THROUGH A TRAFFIC CIRCLE ABOUT A MILE PRIOR, AND WAS IN A SMALL LINE OF "TRAFFIC" TRAVELLING ON THE ROAD. THE REAR WHEELS BEGAN TO LIGHTLY SHAKE (IT FELT SIMILAR TO DRIVING ON RUMBLE STRIPS) FOR APPROXIMATELY 3-5 SECONDS, THEN SEVERAL WARNING LIGHTS ON THE DASH LIT UP AND THE TRUCK VIOLENTLY "JERKED" THEN PULLED AND DRIFTED ONTO THE RIGHT SIDE OF THE ROAD, ONTO THE SHOULDER. THE TRUCK THEN SPUTTERED AND STALLED. I DID NOT ATTEMPT TO RESTART OR MOVE THE VEHICLE, INSTEAD WORKED WITH THE DEALERSHIP TO OBTAIN A TOW TRUCK.
TRUCK STARTED MAKING VERY STRANGE NOISE,, CAME HOME LET TRUCK SIT, WENT TO RESTART AND ENGINE LIGHT CAME ON, TRUCK MADE VERY HORRIBLE SOUND, AND STARTED SPITTING OIL OUT OF THE SIDE OF THE BLOCK. HOLE IN BLOCK AND AT LEAST ONE PISTON DESTROYED.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Categories with enough reports to have a page of their own
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