2020 Chevrolet Silverado 1500 UNKNOWN OR OTHER

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.

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).

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.

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.

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.

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)

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

Unknown

Rear window leaks

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

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.

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.

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 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.

Rear window seal is leaking causing mold in vehicle.

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.

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.

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.

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?

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