2020 Chevrolet Silverado 2500 engine problems

Filed May 14, 2026 · Engine · AK

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

Filed Feb 17, 2026 · Engine · 50,616 miles · NE

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.

Filed Feb 12, 2026 · Engine · 173,794 miles · NC

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.

Filed Nov 10, 2025 · Engine, Transmission · 188,000 miles · MO

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 the federal safety agency 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.

Filed Sep 2, 2025 · Acceleration, Engine · AL

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)

Filed Apr 30, 2025 · Engine · OH

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

Filed Feb 3, 2025 · Engine, Fuel system · 131,000 miles · CO

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.

Filed Jan 14, 2025 · Acceleration, Engine · MO · 2 injuries

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.

Filed Jan 10, 2025 · Engine · 135,000 miles · CA

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.

Filed Sep 27, 2024 · Electrical, Engine · NM · fire

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.