2020 Chevrolet Silverado 1500: check engine light

Filed Nov 2, 2026 · Brakes · OH

Was driving for about an hour pulling our 7,000 lb camper when all of sudden my daah lit up with all kind of lights and warnings. The messages were Service Trailer Btake System, Service ESC, Service Parking Brake, Brake System Failure 62mph top speed, check engine light, Traction Control Off, ABS Off. Pretty much had no brakes and had to use the manual gear selection to slow down from 65 mph. Not a good feeling wh no brakes pulling a camper. The brake pedal was hard and used everything I had to get it to go in to try to stop. Now my rear brakes on the truck currently making all kind of noise and the truck went to the mechanic today.

Filed Oct 26, 2026 · Engine · CA

Incident: Twice our Chevrolet Silverado 2020 Duramax has experienced while operating, sudden with no warning "reduced engine power" and "check engine light" the engine sounds very different and does not operate as it should and presents a safety issue when you are driving and traveling at a high rate of speed. These incidences occurred on 10-4-2026 and 10-23-2026. The vehicle experienced a sudden failure of the engine coolant control valve, triggering Diagnostic Trouble Code P1006. This component failure restricts proper engine thermal management and poses a risk of sudden engine overheating while driving. General Motors has formally acknowledged this identical part failure as a chronic manufacturing and safety defect via Special Coverage Bulletins N252508341 and N252508340, which extend warranty coverage to 15 years/150,000 miles. However, GM has arbitrarily excluded the 2020 model year from this coverage, despite the vehicle utilizing the exact same defective part assembly number as the covered 2021-2023 models. This identical component failure across model years constitutes an unaddressed defect pool that requires immediate regulatory expansion to protect consumers from unsafe engine component failure. please fix this situation TY

Filed Oct 23, 2026 · Brakes, Electrical · TX

It said on the dash, "Brake System Failure 43MPH Top Speed," "Service ESC," and lights on were the ABS light, BRAKE light, Engine Light, and Wheel Traction light. My wife and my [XXX] son's safety were at risk while driving on a busy 75mph highway and trying to turn around and make it home as the brakes did not work and having to cross busy streets. It was not able to reproduce but my local mechanic found the bulletin from way back that had not been addressed by GM after numerous times to a dealer for other repairs. I then took it to a local GM dealer that confirmed software update was not applied and they did the repair and I was charged to pay even though this was a known GM issue that never contacted me about this potential fatal random occurrence that could happen after I have taken great care of this truck. There not any warnings before randomly losing power on the highway once she hit 60mph on the on ramp and just started failing slowly. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 20, 2026 · MI · fire

We were traveling at approximately 65 miles per hour while towing our Coachmen Apex travel trailer with our 2020 Chevrolet Silverado 1500 LT equipped with the 3.0L Duramax diesel engine. During travel, we heard a loud popping sound originating from beneath the hood. There were no warning/engine lights or smell. Immediately afterward, we observed substantial smoke billowing from the front of the vehicle.We pulled off the highway as quickly as possible. Smoke began entering the passenger compartment through the ventilation system, and we observed flames beneath the hood. Recognizing the immediate danger, we evacuated the vehicle and removed our dog. We attempted to extinguish the fire using a fire extinguisher; however, our efforts were unsuccessful. The fire spread rapidly, and within minutes, the truck became fully engulfed in flames. The speed and severity of the fire left us with very little time to escape. We are fortunate that we were able to get ourselves and our dog out of the vehicle. This was a frightening and traumatic experience that placed our lives at serious risk while traveling on a major interstate highway. The incident also raises serious concerns about the safety of this vehicle and the potential danger posed to its occupants, other motorists, and anyone traveling nearby. We purchased and meticulously maintained this vehicle with the reasonable expectation that it would provide safe, reliable transportation. Instead, our 2020 Chevrolet Silverado 1500 LT experienced a catastrophic fire while traveling at highway speeds and towing our travel trailer, resulting in the complete destruction of the vehicle. Although we were able to escape, this incident could have resulted in serious injuries or fatalities. The rapid progression of the fire, combined with smoke entering the passenger compartment, raises significant concerns about vehicle safety and the time available for occupants to escape.

Filed Oct 20, 2026 · Transmission · TN

Transmission started slipping for no reason around 100 thousand miles. All maintenance had been done no code was ever shown on dash no check engine light took it to 3 different places and had it tested all said the same thing they couldn't find anything wrong. Now its sitting at the shop and they are saying its the Transmission and it needs a new one.

Filed Oct 19, 2026 · Transmission · 60,000 miles · TX

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while attempting to reverse at an undisclosed speed, the vehicle accelerated independently. The check engine warning light and transmission warning light illuminated. The vehicle was towed to a dealer, where it was diagnosed that the engine and transmission required replacement. e. The failure mileage was unknown.

Filed Oct 7, 2026 · Acceleration, Fuel system · TX

I received a notice via OnStar of a P129 code of a critical issue with engine or transmission system on my 2020 Silverado pickup after I pulled on to the highway. Vehicle reduced engine power warning and engine light came on. I was forced to put vehicle in neutral and restart vehicle several times. This code indicates fuel pump control module being defective. After researching, there seems to be issues with this on the the following; General Motors has issued voluntary emission recalls (such as bulletins N252516900 and N262558690) for the fuel pump power control module on select 2021–2023 Buick, Cadillac, Chevrolet, and GMC vehicles. The issue with my vehicle is the same.

Filed Oct 5, 2026 · Electrical, Engine · 73,000 miles · FL

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving, the vehicle was shuddering. The vehicle was taken to the dealer and was diagnosed with transmission failure. The contact was informed that the torque converter and transmission needed to be flushed. While driving approximately 30 MPH, the vehicle was shuddering and the transmission seized, with the check engine warning light illuminated. The failure had occurred briefly, and the failure was self-corrected, and the contact continued driving. The failure reoccurred approximately 2 - 3 times. The vehicle was returned to the dealer, and the transmission was replaced. The failure persisted, and the vehicle was returned to the dealer, and the transmission was replaced a second time. The vehicle was returned to the dealer, who was unable to diagnose or repair the vehicle. The contact drove the vehicle an additional 20,000 miles before the vehicle received additional repairs. The manufacturer was informed of the issue several times. The failure mileage was approximately 73,000.

Filed Oct 2, 2026 · Engine · OH

I was driving down the highway doing 70mph when my check engine light started flashing. I had to pull over and turn off my truck and turn it back on in order for it to go away. I brought it to the dealership and they explained that I had a misfire on the entire driver side of the engine and I would need to replace it. I have kept up on all of my vehicle maintenance but it still requires a new engine, costing $11,000 if not covered under warranty. This is a known problem with the Chevrolet 6.2L V8 engine and is now a class action lawsuit with the company.

Filed Sep 25, 2026 · Engine, Fuel system · MO

have notice that the car jerks hard from time to time and when try to accelerate the car does a quick/short stop then accelerates hards very jerky. Also I smell coolant and my check engine light came on..

Filed Sep 8, 2026 · Brakes · TN

While driving my 2020 Chevrolet Silverado 1500, the braking system suddenly malfunctioned without any prior warning. When I released the accelerator, the vehicle began slowing as though the brakes were being applied even though I was not pressing the brake pedal. When I attempted to brake normally, the vehicle did not stop as expected and braking ability was significantly reduced. The red BRAKE warning, ABS warning, traction/ESC warnings, and check engine light illuminated. The dashboard displayed “Brake System Failure – 43 MPH Top Speed,” “Service ESC,” and “Service Trailer Brake System.” Because of the reduced braking ability, I stopped the vehicle and had it transported by flatbed tow to a Chevrolet dealership rather than continue driving it. The Chevrolet dealer inspected the vehicle and documented diagnostic trouble codes P25A2 and C053D. The dealer stated that the Brake System Control Module requested the warning light and that updated software was available to address these codes. The dealer reprogrammed the Brake System Control Module according to a GM technical service bulletin. No mechanical brake components were replaced. I was charged $362.95 for the diagnosis/reprogramming. I am reporting this because the failure occurred suddenly while the vehicle was being driven and resulted in significantly reduced braking ability, creating a serious risk of a crash. The vehicle had approximately 74,221 miles at the time of the incident. The dealer repair invoice documenting the codes and repair is available upon request.

Filed Aug 28, 2026 · Electrical, Engine · 10,000 miles · FL

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that the infotainment center intermittently went black, and there was water leaking into the vehicle through the top and lower center of the front windshield and the rear windshield. The vehicle was taken to a dealer, where the rear windshield was replaced without a diagnostic being performed; however, the failures persisted. Additionally, the side view mirrors intermittently failed to unfold when starting the vehicle. The contact stated that while driving approximately 40 MPH, white smoke emitted from the exhaust, the vehicle hesitated, and it lost power. The Check Engine warning light illuminated, along with "Service Electronic Stability Control", "Trailer Brake System", "Steering Assist Reduced", "Service Brake Assist", and "Brake System Failure" messages, and the vehicle failed to exceed 40 MPH. The vehicle was towed to a second dealer, Arcadia Chevrolet Buick (210 S Brevard Ave, Arcadia, FL 34266), where it was diagnosed that the lifter and torque converter had failed. The lifter and torque converter were replaced, and the system was flushed. Approximately 800 miles later, the engine failed again. The vehicle was towed to an independent mechanic, who diagnosed that the torque converter and transmission had fractured. The torque converter and transmission were replaced; however, the warning lights and messages illuminated again, and the vehicle continued to hesitate when driven over 42 MPH. After being parked for a few days, the warning lights were no longer illuminated and the mirrors opened, but the engine hesitation persisted. The vehicle was not further diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 10,000.