2020 Chevrolet Silverado 1500 Other Problems

Your brakes are locking up while you're driving, requiring you to turn the engine off and restart it multiple times to get them to disengage. This has happened twice in 8 weeks and makes the vehicle unsafe to tow your travel trailer. Your Chevy dealership has indicated this matches a known recall issue, but says the recall may not officially apply to your truck.

Your truck's ignition key sometimes won't come out after turning off the engine. You have to repeatedly cycle the engine on and off until the key finally releases. This is a frustrating workaround that shouldn't be necessary on a vehicle with only 54,000 miles.

6L80 transmission shift flared when shifting from 2nd to 3rd gear and shuddered when driving at 45 - 50 mph and about 1400 rpm’s. The Torque Converter Clutch was spasming out causing the the torque converter to shudder which caused the torque converter to overheat at 250 degrees therefore exploding the torque converter that shot metal inside of the transmission blowing it up.

I noticed that the carpet behind the seat was wet and moldy in the truck so I started looking and noticed the rear window was leaking in two areas. This has obviously been going on for a while as it explains why the kids have been complaining about the smell back there. Since Florida is sub-tropical mold and mildew is a problem and a health issue. I investigated and found hundreds of complaints regarding this issue with failed sealant and cracks. I also discovered a service bulletin that describes the issue but GM refuses to fix it since they say it's not a safety or mechanical issue. Well, I happen to disagree with that since the leak causes the window to fog up and an unsafe environment for people to breath in mold spores in a small space. So, my visibility is impaired and I have to suffer with respiratory issues? This seems to be reason enough for them to perform a permanent repair at their expense, not mine and they can take it out of the designers pay, not mine. Can you help with this?

I am reporting an issue with a 2020 Chevrolet Silverado 1500 equipped with the 3.0L Duramax diesel engine. The vehicle experienced a failure of the NOx Sensor Position 2, which significantly impacted performance and emissions compliance. GM previously issued Emission Recall N212351211 (March 7, 2023) for other diesel Silverado models regarding improper ECM detection of NOx sensor faults. The issue in my vehicle appears functionally identical, yet this engine and model were not included in that recall. The sensor was replaced and reprogrammed at a Chevrolet dealership at the owner's expense. After contacting Chevrolet, a customer retention check was provided, covering roughly half of the total cost. While appreciated, the remaining cost burden remains significant. If this model is eventually included in the recall, it may allow for full reimbursement and support for other affected owners. Online forums show that many 3.0L Duramax owners are experiencing similar failures, suggesting this may be a widespread and systemic defect. Due to the strong similarities with the recalled condition in other models, I respectfully request that NHTSA investigate whether this recall should be expanded to cover additional affected vehicles. This issue presents both reliability and emissions compliance concerns. In addition, the vehicle developed a separate mechanical/electrical problem shortly after the NOx sensor failure. Because it involves different systems, I will file a separate complaint regarding that issue.

I am reporting an issue with a 2020 Chevrolet Silverado 1500 equipped with the 3.0L Duramax diesel engine. The vehicle experienced a failure of the NOx Sensor Position 2, which significantly impacted performance and emissions compliance. GM previously issued Emission Recall N212351211 (March 7, 2023) for other diesel Silverado models regarding improper ECM detection of NOx sensor faults. The issue in my vehicle appears functionally identical, yet this engine and model were not included in that recall. The sensor was replaced and reprogrammed at a Chevrolet dealership at the owner’s expense. After contacting Chevrolet, a customer retention check was provided, covering roughly half of the total cost. While appreciated, the remaining cost burden remains significant. If this model is eventually included in the recall, it may allow for full reimbursement and support for other affected owners. Online forums show that many 3.0L Duramax owners are experiencing similar failures, suggesting this may be a widespread and systemic defect. Due to the strong similarities with the recalled condition in other models, I respectfully request that NHTSA investigate whether this recall should be expanded to cover additional affected vehicles. This issue presents both reliability and emissions compliance concerns. In addition, the vehicle developed a separate mechanical/electrical problem shortly after the NOx sensor failure. Because it involves different systems, I will file a separate complaint regarding that issue.

I was enjoying my day off with my family while driving torch highway when I try to pick up my speed to merge in, but my truck was not responding, when stepping on gas, I certainly did not saw any of them gears change I had to put to the for our safety and had to call a tow truck.

I began having difficulties with my transmission at around 75,000 miles. The transmission began to stutter and slip. The transmission felt like I was driving on rumble strips. Transmission was replaced after waiting approx. 4 months. The transmission was replaced with a new GM transmission at the dealership.

Rear sliding window is leaking from unknown area.

The engine blew a rod through the engine block and dealership replaced engine June 2023. January 2025 engine abruptly stopped while on the highway at 70 mph and now waiting on diagnostic test from dealership but after reading all the incidents regarding this engine I feel it’s another L87 engine failure from GM

Rear window leaks water into the cab during rain, snow, car wash, etc. GM refuses to abide by comprehensive warranty to fix the issue, and my dealership wants to charge around $1,000 just to apply sealant. Water goes into and behind the rear seat (where my child sits) and goes to unknown area. Water can cause rust, mold, electrical problems, or any other number of issues. I noticed it around November of 2024 but I don’t know how long it has actually been occurring for. When researching this issue, appears to be relatively commonplace for my year and style of vehicle. Even the GM techs at my dealership acknowledged it is a recurring issue that may require MULTIPLE visits before getting a permanent solution (replacing the entire window).

While driving, the vehicle began experiencing hard shifting. When I attempted to accelerate to pull over, the vehicle failed to respond and instead sounded as though it was in neutral. Additionally, when I tried to bring the vehicle to a stop, it took longer than usual, as if the wheels were locked.

The 10 speed transmission suddenly downshifts when slowing down. It goes from like 8th to like 3rd suddenly and the rpm’s shoot way up. The wheels do not skid on pavement but will be an issue when the roads get slick here in West Virginia. This is a serious safety concern. This has happened many times since I purchased the truck. The dealer in the past has told me the transmission needs flushed. But now I’m seeing that there is a recall for new transmission software. I would like to have this update please before the roads get slick from snow and ice.

Engine start to make noise while driving Took my truck to a auto shop Mechanic said that it is a fabric defective engine

THERE IS A KNOWN ISSUE WITH KNOWN LEAKS AT THE REAR SPOILER/ 3RD. BRAKE LIGHT. DUE TO THIS LEAK, THERE IS AN ODOR IN THE VEHICLE CAUSED BY MOLD OR MILDEW WHICH IS CREATING BREATHING AND ALERGY ISSUES. I RECENTLY HAD OPEN HEART SURGURY AND THIS IS STARTING TO EFFECT ME TO THE POINT I CAN NOT BE IN MY VEHICLE WITHOUT THE WINDOWS ROLLED ALL THE WAY DOWN. AND I GO INTO SNEEZING FITS WICH IS A SAFETY CONCERN

The rear third brake light spoiler leaks causing damage to my headliner and vehicle. I have researched this and it appears to be a known issue to GM. However, GM is saying that my vehicle is not affected as of yet. I had an estimate completed on the vehicle by a local body shop. They believe the issue involves the spoiler assembly nuts not being properly tightened and sealed by the manufacturer. A repair will cost approximately $593.63.

Unknown

Water leak above the rear sliding window has soaked into carpet & upper roof inner lining panel.

The DEF system tank and heater tube/wiring assembly need to be replaced due to the wiring melting. There should be larger wires or a fuse to prevent this. The system is tied to the Emission Controls system in the vehicle. When this happened I was warned on my dash display I had only 165 miles remaining at 65mph, and presumably slower thereafter. I live in Alaska, we travel long distances, sometimes in extreme cold temperatures and always far from help; even cell service if away from urban centers. I find it unacceptable my truck can decide to strand myself and/or family (3 children under 5) based on emissions, not run-ability. The temperatures in Alaska have been severely cold a couple weeks ago when this issue came up. The issue is confirmed by the dealership and is a known issue in the diesel community. Apparently it is a known issue for diesels in cold weather. Diesel is common in cold weather so the issue is perplexing at best. The vehicle has never been inspected by any one other than myself, a mechanic and the dealer. There were no warning lamps, only the dash warning the emission system needed service.

Rear window leaking like a small stream in regular rain. It’s going down behind seats and carpeting and headliner staining worse and worse and I am worried about black mold being created. Husband has lung issues and that can be verified by our physician. We have told Jenkins chevy in Venice florida 5/4/22, 3/20/23 and now living in TN spoke to Champion Chevy in Johnson City on 9/29/23 and 1/5/24..it’s getting worse and as we are out of warranty no one wants to help. We never received any bulletins on my chevy site and it’s not anything you would normally notice but now we smell the mildew smell back there because it is getting worse. Please help us before we get ill from this awful leak. This is my first Chevy pick up I have purchased in my lifetime. Possibly the last.. [XXX] [XXX] God bless you INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Rear window leaks

Rear window leaking

The rear power sliding window in my 2020 Chevrolet Silverado 1500 LT leaks whenever it rains. The leaking water enters the cab and runs down the back interior wall of the crew cab and saturates the insulation material and the carpeting on the floor. The moisture has caused the seat brackets that attach the seat to the truck to rust and it has also caused mold inside the cab. I purchased a DIY mold test kit and it was positive for mold. My kids and I have allergies and this is causing issues with our health and if it continues it could cause serious health problems. This known issue of the leaking rear window is very widely discussed on many different gm truck forums and internet sites yet gm will not take ownership of this obvious problem.

My backup camera is not functional and it stopped working in April a month after I purchased the vehicle before my lease expired in May. I took it into the dealership for a software update and they refused to do anything without charging me a $160 fee.

water leaking across head liner/ rear sliding window junction. leaking on to granddaughter in child seat. bought truck new, may of 2020. garage kept, day and night. less than 22,000 miles.

Started to notice water marks on the driver and passenger side rear window. According to online forms it is a common problem with 2019 and 2020 silverados with a sliding rear window. The dealer claimed it wasn't a safety issue, which I argued it was due to the mold. Chevy knew about the manufacturing problem before they even sold me the vehicle and did nothing to fix it

I am writing this complaint to bring up the melting dashboard on my 2020 Silverado. I took my vehicle to Beaver Chevrolet in Jacksonville ,FL and they identified that there is an issue with my dashboard. However, they refused to fix or replace it. The service manager check his personnel vehicle and confirmed that his is sticky as well. My co-worker who owns a 2020 GMC Sierra also has a sticky dash. This issue is dangerous as my dash is very shiny and reflects everything onto the glass making it very difficult to see.

Rear window seal is leaking causing mold in vehicle.

Rear window seal leaking.

The tucks are high so a backup camera is now more important than ever. During the day the image very grainy but useful. At night or in a dark garage it completely useless. I took my truck in to be checked and they agreed it was terrible but nothing could be dome until a recall was issued. I've done research and this seems to be a huge problem with the 2020 Silverado. I reached out to Chevy and the lady I chatted with said I should file this here with you. There are multiple chats and message boards about this issue and Chevy lack of being willing to fix it.

Passenger door lock failed. Door will not lock with any door button, key fob, automatic lock function, or when vehicle shifts to drive. Door must be manually locked by pressing lock down and unlocked by pulling door handle risking safety of passenger. Issue has been reproduced, inspected, and confirmed by independent mechanic but no diagnostic has been ran yet. There were no warning lamps, messages, or symptoms present prior to failure.

The Advanced Trailering system will fail to load, preventing the user from entering the correct vehicle being towed and the entire system screen is blank and won't load. This could be a huge safety concern if the driver cannot select the correct vehicle being towed since the Brake Gain is stored in the Advanced Trailering system and then the incorrect amount of braking force will be applied to the vehicle while it is being driven, which could cause insufficient or excessive braking forces applied to the towed vehicle. This could lead to rear end crashes or Jack-Knifed crashes. The problem is random but repeatable quite frequently and has been confirmed by the Dealer (refer to included GM Bulletin PIT5792 Published on 11/5/2020) GM has been aware of this problem for almost 2 years and has not provided a fix for it. I have had this vehicle in the dealer on at least 3 occasions to fix the problem There is no advanced warning, message or other symptom prior to this problem. The problem started within a month of purchasing the vehicle

I have been researching rust on frame components and found there have been service bulletins issued (e.g. PI0564K) for this same issue. However, the latest service bulletin only covers up to model year 2019. Is there anything in progress to extend to model year 2020?

I bought the truck a year ago drove it home it stalled out on me for no reason thank goodness I was in a neighborhood when that happened, fast forward a year of driving it and now my gauges aren’t working it’s throwing all these warning signs and spent a lot of money on this truck and for what for all these problems that it’s having it’s my only vehicle for my kids and me and the wife and now I’m worried it’s going to cause me to get into an accident.

When I drive this car on the free way or on a very windy day, a loud air gap is caused by the front driver and passenger window. It hasn't been inspected by the dealer or anything but I believe there could be something wrong with the quality of glass or the seal that hold the glass. I've also driven with the windows lowered on a windy day and saw the edge of the glass bend. I'm worried it's gonna snap or shatter one day. It's been happening since I bought it but I didn't notice until I drove on the free way.

After putting my vehicle in reverse, my backup camera did not come on and gave a warning that the camera was not working.

MY TRUCK IS ONLY A YEAR OLD AND ONE MORNING I WAS REVERSING OUT OF DRIVEWAY AND BACK UP CAMERA STOPPED WORKING

WHILE DRIVING AROUND 40 MPH AND HIGHER TRUCK SUFFERS EXTREME WIND NOISE WHICH THE DEALERSHIP DESCRIBES AS WIND TURBULENCE. TRUCK SOUNDS LIKE A WINDOW IS CRACKED OPEN WHILE DRIVING EVEN THOUGH ALL WINDOWS ARE ALL THE WAY UP.

MY NEW 2020 CHEVY SILVERADO TRAIL BOSS TRUCK BURNED DOWN IN MY FRONT YARD. I HAD DRIVEN IT THAT MORNING FOR A SHORT DURATION AND IT WAS OPERATING NORMAL. I ARRIVED HOME AROUND 1:30PM, PARKED IT AND AWOKE TO IT FULLY ENGULFED IN FLAMES JUST BEFORE MIDNIGHT. THE TRUCK HAD BEEN PARKED FOR APPROXIMATELY 10 HOURS BEFORE IT IGNITED.

THE 2019-2021 SILVERADO'S HAVE A MAJOR SAFETY ISSUE WITH THEIR REARVIEW CAMERAS AT NIGHT TIME. THE INFOTAINMENT SCREEN ON THESE VEHICLES DIMS APPROPRIATELY AT NIGHTTIME TO ENSURE SAFE VIEWING OUTSIDE OF THE VEHICLE, HOWEVER AT NIGHTTIME WITH THE INFOTAINMENT SCREEN DIMMED, WHEN SHIFTING INTO REVERSE THE SCREEN GOES TO FULL BRIGHTNESS AND MAKES VISIBILITY OUTSIDE OF THE VEHICLE ALMOST IMPOSSIBLE ON PARTIALLY LIT AREAS. THIS CAUSES SAFETY ISSUES AS YOU ARE NOT ABLE TO MAKE USE OF YOUR MIRRORS TO SEE OBSTRUCTIONS OR OBSTACLES. THIS IS FURTHER MAGNIFIED AS THE QUALITY OF THE REAR VIEW CAMERA AT NIGHT IS VERY POOR, SO THE POOR CAMERA QUALITY COUPLED WITH THE INABILITY TO EVEN USE THE VEHICLES MIRRORS TO SEE OUTSIDE CAUSES SAFETY ISSUES. MANY OTHERS HAVE COMPLAINED AND DOCUMENTED THIS SAME ISSUE AND HAVE RAISED CONCERNS WITH GM AND DEALERSHIPS TO NO AVAIL. THIS SHOULD BE AS SIMPLE AS A SOFTWARE UPDATE TO MAINTAIN SCREEN BRIGHTNESS WHEN SHIFTING INTO REVERSE DURING NIGHTTIME OR DARK CONDITIONS.

THE REAR WINDOW SPONTANEOUSLY SHATTERED L. NOTHING HIT THE THE WINDOW AND THERE WAS NO EVIDENCE THAT AN OBJECT HIT THE WINDOW. THE BOTTOM CORNERS BROKE FIRST. THE TRUCK WAS PARKED AND OFF IN A PARKING LOT. THERE IS SEALANT ON ONE END OF THE WINDOW THAT APPEARS TO HAVE COME OUT.

WHEN DRIVING VEHICLE (OURS DOES NOT HAVE THE STOP START TECHNOLOGY); HOWEVER WHEN IDLING LOW OR COMING TO A STOP THE VEHICLE WILL JERK THEN DIE. THE MOTOR WILL COMPLETELY SHUT OFF; STALLING, THE ONLY WAY TO RESTART IS TO PUT THE VEHICLE IN NEUTRAL OR PARK AND TURN IGNITION AGAIN. THE MOTOR SHUTS OFF ENTIRELY USER IS UNABLE TO DRIVE; PRESENTS A HUGE SAFETY ISSUE. PUSHING GAS PETAL DOES NOT WORK EVEN IF IT DID HAVE THE STOP START TECHNOLOGY.

IT CUT OFF AT A STOP AND AFTER I STOP WITH WITH MY FOOT ON THE BRAKES. I FELL BUMP IN THE REAR OF THE TRUCK, LIKE I BEEN REAR END AND THE REAR SHAKES. SOME THE THE AS WELL. IT CUT OF AFTER I STOP A FEW SECONDS AND START RIGHT BACK UP. IN DRIVE WAY IDLES ABOUT 15 OR LONGER, IT CUTS OFF. I HAVE TO RESTART IT. AND TAKING OFF IN HESITATION AND SOME TIMES MOVEMENT IN THE REAR AND UNDER THE TRUCK. BOTH STATIONARY AND IN MOTION.

BACKUP CAMERA FUZZY MORE AT NIGHT GM SAYS ITS THE THE LOW COST CAMERA BUT ITS A SAFETY ISSUE ITS TERRIBLE.