2023 Buick Enclave problems

“Right-side LED headlight assembly failed at under 3 years and ~55,000 miles. Dealer states the sealed LED unit is non-serviceable and must be replaced as a complete assembly, quoted at ~$1,450. LED headlights are rated for tens of thousands of hours and are marketed to last the life of the vehicle; this failed at a small fraction of rated life. Other 2023 Enclave owners report the same right-side failure at similar low age/mileage, suggesting a recurring defect.”

“The transmission hesitates and momentarily loses propulsion when accelerating out a low speed right hand turn, creating a risk of a rear - end collision. It also shudders at low speeds when accelerating up hill, or when passing vehicles on the highway. After the transmission has reached operating temperature and has been driven for a while, it starts to shift harsh and erratically in the lower gears, at lower speeds. There is a service bulletin out for this issue on my vehicle and the first step of the bulletin was performed and has failed. It has been in the shop several times for this intermittent and ongoing issue. The service bulletin # is: 23-NA-072. I have repair invoices for each time it was in the shop. It is currently back in the shop and has been for almost 2 weeks. The problem was reproduced the first time at the time of the initial start of repairs, but they haven't duplicated it since. There has never been any warning lights, messages or codes that have appeared in my vehicle when this issue arises. The issue first appeared within 4 days of me purchasing it in July of this year, 2026 and was communicated promptly.”

“After purchasing this 2023 Buick Enclave July 26, 2026 two days later I heard a vibrating rattle coming from under the hood. I raised the hood and pinpointed the noise to be coming from under the motor cover. I could not remove that cover myself. I reported it to the dealership where I bought it and they said when I bring it in to have the Paint And interior, Protection to be applied that they would take a look for that rattle sound. After their inspection on 9/16/26 they called me back and said that it was the EVAP purge solenoid tube. And that the fix would be to put two rubber dampeners onto the purge tube line to isolate the vibrations and stop it from hitting other engine components. Then secure the dampeners with tie straps. They wanted to charge me $331 to do that. I said I’m not paying that so I proceeded to look up this information online and I found there’s an actual Technical service bulletin. It’s not an official safety recall but GM is aware of it and the bulletin number is 21 – NA – 023. So I spoke with my bumper-to-bumper warranty people and they said that if the actual purge valve piece was not broken, then it would be most likely at my expense.…”

“Brakes squeak very loudly. This has been an issue since I purchased this new vehicle.”

“The contact owns a 2023 Buick Enclave. The contact stated that while driving 70 MPH, the transmission unexpectedly downshifted to 3rd gear and the vehicle decelerated. The contact stated that the vehicle went into LIMP Mode. Additionally, the computer system took control of the vehicle. The contact stated that the failure had occurred while driving in the center lane on a busy highway. The vehicle was driven to a safe location. The vehicle was towed to the dealer and was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was repaired. The failure mileage was approximately 30,000.”

“Driver's seat belt cable going to floor on outside of seat broke, it is available for inspection. Seat belt is inoperative. I spoke with a dealer, but I am over on miles to be covered by warranty. The vehicle has not been inspected, and there were not any warning lamps or warning' I noticed when I tried to buckle up for ride home Friday evening 10/10/2025”