The OnStar system has failed, which eliminates collision detection

- Savannah, GA, USA

To whom this may concern, This gmc truck with the 6.2 has had constant engine issues regarding the lifters failure causing the engine to destroy itself internally I-??ve had to get it repaired every 3 Months on average there-??s also a class action lawsuit that applies only to the 2025-2020 years however they are the exact same engine in the 2017. The transmission is not in sync with the motor having a late take off or sounds like the gears are grinding between shifting

- Montgomery Village, MD, USA

The vehicle consistently shuts off unexpectedly when trying to park or slow down, making it difficult to steer or control.The electric power steering stops working, especially when turning at low speeds.

- Gulfport, MS, USA

On [xxx]\ while travelling from Georgia to Florida, we fueled up at the [xxx] exit. As we left and started up the on ramp, the transmission in the truck failed. We were able to make it to a campground nearby and we called a local transmission repair shop. Not thinking anyone would answer, someone did and told us to bring the truck in the next day. To make a long story short, we did some research on the transmission in the truck and found there were a few class action lawsuits on this particular transmission. In fact, the transmission repair shop told us he has had to work on quite a few of vehicles with this particular transmission. I find this quite disturbing since no recalls have been issued on this transmission. The truck only had 135,000 miles on it. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Grand Marsh, WI, USA

On 12/5/24 took the truck to the dealership where we bought it with a complaint about the transmission. They took for a test drive could not find anything wrong with it, recommended we have the transmission flushed and filter replaced. They could not do the service so we got it into our local Chevrolet Dealership who did the work for us on 12/6/24. On [XXX] as we were departing a gas station in Tifton, GA, the transmission would not shift out of first gear and the temperature rose up to 234 degrees. Limped the vehicle to a campground, called a transmission shop who told us to bring in the truck at 7:30 am o 1/2/25. They were able to replace the transmission on 1/3. We had to drive it 500 miles before we could continue on our journey to Florida. Trying to accelerate on the Interstate and not being able to significantly put us at risk of a crash. Once the temp rose on the transmission the check engine light also came on. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Adams, WI, USA

I remote started my truck and entered the vehicle with my girlfriend approximately 3mins after remote starting. We immediately smelled smoke that smelled like an electrical fire. I heard sizzling/static-like/electrical short sounds coming from back seat and when I looked back, I saw thick white smoke pouring out of the the small black plastic trim piece on the rear power sliding window that covers the electrical connections between the sliding pane of the power sliding window and the solid, non-moving pane of glass on the passenger side of the rear window assembly. I immediately shut the truck off and climbed into the back seat with a flashlight to investigate. While looking at the rear window, the passenger side non-moving pane of glass in the rear window EXPLODED very loudly, which actually hurt my ears. The glass stayed intact but spider webbed the entire pane. I immediately pulled the fuse for the rear defroster and cleared the tremendous about of smoke that had filled my cab. The window continued to make sizzling and static like noises for the 20min ride home. Upon investigating this issue online, I discovered that GM has issued a recall on this defect for all of Canada and only certain US states that are above a certain longitude, which doesn-??t include my state of PA. I am terrified to use my remote starter on the vehicle now or even preheat the truck manually for fear of burning mu truck down. I contacted a GM dealership who told me my truck didn-??t have any active recalls on it and to file an insurance claim. I have since filed a complaint to GM customer service who is investigating my claim to determine if they will cover the repair. They said up to 30days to make determination! This is a huge safety hazard that is known and acknowledged to be in every Silverado and Sierra with a power sliding rear window within the model years 2014-1017

- Rochester , PA, USA

Noticed a/c getting warm. Attempted refilling Freon without success. Took by auto shop and they discovered the welds to the top driver side of the condenser were in question and ruptured causing a Freon leak. They advised a replacement and stated -??this is very common with GM model trucks and SUVs. Save your info and report for recall. They need to recall these models for their a/c issues.-?? Condenser replaced with receipt attached

- Benton, AR, USA

on [XXX], i remote started my vehicle about 10 minutes prior to leaving work. when i left and walked out to my truck i opened the driver side door and noticed smoke in the vehicle and an odd smell. upon looking around the truck i heard a loud pop and the passenger side of the rear sliding back glass shattered. upon further investigation this has been an ongoing issue with gm trucks and even 159,000 have been recalled in Canada and there has been no recall issued in the United States. the major safety concern is that in the back seat of my vehicle i have two car seats for each of my toddler aged sons. i am just thankful that neither one of them were in the vehicle when this happened. i brought the vehicle to the dealership and they told me that there was indeed a short in the wiring going to the back sliding window and defroster but there was nothing they could do other than replace the glass. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Northfield, CT, USA

The info system starts to change screens and jump around. We had it on navigate it locked the screen. You couldn't touch anything then. It started messing with the controls on the -Changing it from the speedometer to music and again would not allow you to touch anything calibrated or anything along those lines. After googling it, several vehicles are having the same problem. All around 50000 miles, our vehicle has about 80000 miles.

- Fort Liberty , NC, USA

This complaint is about General Motors not allowing their Dealer Marty's Chevrolet of Bourne Ma. to recalibrate the odometer and speedometer and other parameters in the computer to match new 18"wheels and tires. The truck was built and set up for 20" wheels from the Factory. The previous owner installed 22" wheels immediately after leasing the vehicle. They never adjusted the computer for this change and as a result the odometer reading read 28700 when I purchased it in August 2023. As a result the engine hours do not correlate to the low miles and the speedometer reading is incorrect. This truck has about 75 to 80 thousand actual miles. When Marty's installed the new wheels that I bought, GM refused to authorize the computer adjustments for the new wheels. GM previously required this adjustment, but no longer does it. This is a safety risk and actual fraud because of the inaccurate miles recorded. I hope you can require them to authorize this adjustment.Attached is an old instruction from GM to dealers for this wheel size change work order.

- Sandwich, MA, USA

A/c just immediately went hot while driving. There is a crack in the condenser weld on the upper right front drivers side. Will be at the dealer next Monday.

- San Diego , CA, USA

I purchased my vehicle in January 2022. On 11/18/22 I captured a photo across my dash stating that the trailer brake system needed to be serviced (photo attached). This was the second time this message appeared within days. The vehicle continued to beep and flash for a long period of time clearing out my dash screen making it UNSAFE TO DRIVE. The beeping noise startled me, almost causing an accident on the freeway. I did not know what the warning meant as I wasn't towing a trailer. I wasn't towing anything and could not turn off the beeping sound or the flashing screen, in spite of hitting the dismiss button. I don't know why the message continued to go on and assuming there is an electrical shortage somewhere with the wiring. This needs to be recalled and fixed as it is a manufacturer issue. I do not have any aftermarket parts installed in this vehicle. This same alert message appeared again yesterday 12/5/22 as I was driving back from the airport. It continued for almost 2 hours while on the freeway and again I was not pulling or towing anything. I pulled over, checked my tailgate, turned off the vehicle and turned it back on and the message continued until I got home. It is very alarming and annoying and scared me. This is a big safety hazard and almost caused an accident again as the alert is very loud and flashes across, clearing out your screen, causing you to take your eyes off traffic looking ahead. This time, I was traveling in heavy traffic. Please investigate this further. Thank you

- Salida, CA, USA

The paint has substantial flaking/ easy scratching casting spots down to primer and bare metal

- Madison, ME, USA

My air conditioning condenser has a leak and leaked all my refrigerant out of the system. From my research and talking to the dealership mechanic, it is a problem GM refuses to do anything about unless your vehicle is under warranty, and they are aware this is a big problem, numerous complaints.

- Reeds Spring , MO, USA

I live in Corona CA where the temperatures easily exceed 100f in the summer months. I was picking my kids up from school yesterday and the AC started blowing warm air. We had to open the windows which brought in even warmer air into the cab. After a little research online, I found there are numerous Sierra owners experiencing the same issue. 99% of the failed AC is due to a "weak weld on the condenser."(see attached photo) Unfortunately, I could not find any recalls or TSBs related to this problem. With the exorbitant amount of Sierra owners experiencing the same-exact-issue, GM MUST be aware of this issue. This should be determined a safety recall, since this is a passenger vehicle, manufactured to provide safe in-cab temperatures for human beings.

- Corona , CA, USA

Cold start after vehicle sits for a while vehicle shark bites and stutters. When you try and drive vehicle before it-??s been warmed up significantly. It-??s a safety concern because it feels very danger and could cause an accident. Alamo At caused my truck to stall out the other day with my children in it and a large accident. Dealership is dismissed my concern and says it-??s normal gmc defects that I have to deal with. I will sue GMC if I have to.

- Mashpee, MA, USA

The trailer brake system on my vehicle suddenly stopped working. I was alerted by a continuous chime and message saying "Service Trailer Brake System." My brakes stopped working and made it difficult for me to stop my vehicle and loaded trailer. It was very frightening because I had lost all trailer braking function and feared I would not be able to stop my vehicle. In addition, the chime and message are non stop and very distracting and cause some components of my dashboard to be inaccessible making things more dangerous. Unfortunately, the distracting and frustrating chime and message continue even without a trailer attached.

- Blackshear, GA, USA

I was driving and my Trailer brake system warning started going off. I ha e never towed anything so not sure why this is happening.

- Virginia Beach, VA, USA

My complaint is of the intelilink system in this vehicle. While driving the system would change screens, when turned off would turn itself back on. It would hang up on phone calls, would make all these beeping sounds and change stations on radio. It was very distracting and I feel dangerous in that especially at night as I said would not stay turned off so the beeping and changing of the screen that would make the large(8-??) screen go from night mode to day mode and shine into your eyes. When navigating to somewhere system would show that you were in one place, when you were possibly 20 miles from where it would show you to be. Bad because it maybe showing and telling you turn by turn directions and all of a sudden it-??s gone. This problem has been diagnosed by a dealer and repaired at a cost of $887.85. Was told that it is a very common repair that they do. Have contacted gm customer service and let them know that I thought a 2017 vehicle with 35000 miles should not have this problem and would like some kind of compensation for the problem and repair

- North Port, FL, USA

My rear window suddenly shattered. Heated sliding back window. No other explanation. My vehicle was parked in my driveway.

- Davenport, IA, USA