2020 Buick Enclave

My car starting making a loud noise upon start up and continued while driving, sounded like a GoCart exhaust system and was not normal. It just sounded loud and would get louder when accelerated until the car ran for awhile. I first noticed it at about 83,500 miles. I took to the dealer for checkup at 83,950 miles when I could get an appointment. The dealer (Elco Chevrolet) confirmed the problem upon hearing and looking under the car, there is a bracket broken on the exhaust system and the catalytic converter has a hole/crack in the molding. Our safety is at risk if the exhaust with the crack would create fumes harmful when driving the car and risk of injury if the exhaust would fall off upon driving due to bracket broke. There were no warning lamps or messages from the car. I am submitting this problem as upon discussion with the dealer and investigation online about this, appears that this is a problem with GM vehicles with this make and model, Enclave and Travers, however, my year was not flagged for a recall already established. When I tried to investigate with GM they stated it was because my car was not identified likely due to parts or timing. I am asking to further investigate as there may be a problem with the design of this exhaust system that caused this issue early in the mileage of this car. Asking for further investigation into the make and model of this year for the year 2020.

The vehicle developed an exhaust leak caused by both weld points on the front exhaust pipe breaking. A dealership inspected the vehicle and confirmed that the exhaust welds had failed, creating a hole in the exhaust pipe and triggering a P0420 catalyst efficiency code. The failure occurred at approximately 31,500 miles. The exhaust leak caused increased exhaust noise and emissions warning codes. The dealership recommended replacement of the front exhaust pipe assembly. This appears similar to known failures on the Buick Enclave and Chevrolet Traverse platform where the front exhaust pipe mounting bracket separates from the pipe due to weld failure. GM has issued special coverage adjustments for similar exhaust pipe bracket weld failures on other model years of these vehicles. The failure occurred at relatively low mileage and appears to be a structural weld defect in the exhaust system.

Bracket holding exhaust pipes broke and I'm told it is a hazard. It is over $400 to fix it, I paid almost $6,000 for warranty service contract when I bought my car which doesn't cover it. It looks like this same problem is listed for 2019 but not 2020 which would have covered it if you would list it as a problem for 2020 also. [XXX} Please review and hopefully others have let you know also. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The Front Exhaust got a hole and rusted through as in similar years. This Exact issue is covered for both the 2019 and 2021 Models of the Buick Enclave under a special coverage adjustment (N212356540 and N222385510), but not for the 2020 model. It would seem to follow that if the year prior and after both have this issue, then the middle year should also be covered under a special coverage as the problem had not been fixed. The vehicle is currently getting service done for this exact issue covered under the special coverage adjustments and poses an environmental hazard as the exhaust is not going through the catalytic convertor and dumping pollutants directly in the the air. The only warning was a rattling noise when shifting and according to dealership is most likely caused by the bracket coming detached and breaking off.

We bought our car in 2021 and shortly after our car started pouring water into the driver seat from the ceiling. At that time we thought it may have been a cracked window window. Actually we weren’t really sure because we don’t use the sunroof or anything really. However, it stopped doing it until around October 2023 when it escalated as it is our only vehicle and we are extremely busy. We hadn’t had the chance to take it in yet then in January 2024, while my wife was driving, water, literally poured into her lap while she was driving from the ceiling which could’ve caused an accident, when we took the vehicle in to get it serviced, they stated something that just sounds ridiculous. Something no one even ever made us aware of and something I’ve never in my whole history of owning vehicles with sunroof have I ever experienced I’ve never had a vehicle pour water from the ceiling , the dealership told us that it was our responsibility even though we have all warranties that you can have an as I’m looking online so many people with 2020 Buick enclaves are having the same exact issues with the water pouring from the ceiling. we have not even had our car for three years and now our car is pouring water constantly ruining our vehicle and it is a very big safety concern. We have children and waters pouring all over the driver while they’re trying to drive. I believe this is very big safety concern. I do believe that this is some type of malfunction with the Design, as I did see a recall for the same problem on a enclave, a few years older then ours. I pay $600 a month for my vehicle and I do not have $600 to get the situation fixed when I don’t believe that I should have to pay that when my vehicle came with this issue if someone could please look into this I would greatly appreciate it and I’m sure the hundreds of other people on the enclave recall thread as well. Not to mention the things inside of the vehicle that all this water could damage like my OnStar.

When starting our 2020 Buick Enclave I noticed the low voltage battery light stayed illuminated after startup. A message followed on the message center located in the center of the gauge cluster. The message read Service Electrical Charging System. Followed by a message stating Low Voltage Vehicle Ma Stall. This particular vehicle only has 38,000 miles on it and I have not experienced any issues with the electrical charging system prior to this incident. There have been no indication as to the battery or alternator failing (ex. dim lights, flickering lights, malfunctioning electronics/electrical equipment, unusual noises coming from engine bay). I acknowledged the messages with the button on the steering wheel. I proceeded to drive and the low voltage light went off shortly after. I proceeded to drive approximately 75 miles without incident. Shortly before arriving at my destination the low voltage warning light illuminated and the messages appeared on the center screen on the instrument screen. I again acknowledged the messages ,but this time the low voltage light stayed illuminated until I shut the vehicle off at my destination. I visually inspected the battery post, connections, serpentine belt, and alternator. Nothing looked out of the ordinary and all connections were tight and free from corrosion. Nothing smelled burnt as it would if wiring overheated or alternator. I proceeded to start the vehicle. The vehicle started without hesitation and the low voltage light was not illuminated. I proceeded to drive to a local parts store which was a couple of miles away. On the way to the parts store the low voltage light came on and the messages appeared. I left the vehicle running at the parts store. The employee tested both alternator and battery. The alternator was showing that it was failing only producing 8.6 volts to the battery while the vehicle was running. I proceeded to leave the store. At this point all electrical shutdown simultaneously. Vehicle to be towed.

The rear liftgate locking mechanism failed to latch causing cargo to exit the vehicle where the car behind this car smashed into the cargo causing an accident. For whatever reason the rear door will not lock at all. The fuse was perfectly fine, appears the actuator is defective. No warning was given because the rear liftgate was open and unlatched. After realizing the gate would not close it would notify it was open but the power liftgate operates just fine, and when you activate it, it will push the gate closed and not give a warning until maybe you hit a bump in the road.