Buick Enclave Fuel System problems by year

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.

Buick over concerns while accellerating. They confirmed my transmission needed to be replaced. Our family shop suggested waiting until the end of summer since I wouldnt be driving daily and the replacement would cost nearly 10k. It could only be ordered through GM, making the part substantially higher in cost. When summer break ended and I needed to use my car daily we could not take the car to the dealer or our family shop because the part was no longer available. We could not get a clear time frame of when the part would be in stock, if at all. We had the transmission rebuilt with 166k miles. Nearly 4 months later the trasmission started to shudder again. We took it back to the same shop for repairs becuase it was under warranty. Nearly four months later, the issue began again. The shop said there is nothing I can do to stop it from happening, that the part is deffective and GM knows. I have opened a claim with GM and expect nothing will happen, but it is apparent that the transmission issues are rampant with this vehicle, as evidenced by the complaints here and the droves of complaints on reddit forums.

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. The noise is caused by fuel vapor pulsations vibrating through the EVAP purge solenoid tube. The Symptom: drivers typically notice a rapid clicking or rattling sound under the hood, which can sometimes be mistaken for engine knock or failing engine mounts. Note on code: This specific bulletin is strictly a noise concern and does NOT trigger a check engine light or throw trouble codes like P0496 on its own. The notice from GM also states that if a vehicle is still covered under its factory, bumper-to-bumper or emissions warranty, the repair should be completed free of charge. If you are out of warranty, you may be subject to diagnostic fees or out-of-pocket cost for the fix. After speaking with the service department at that dealership, they said that they were not going to replace the purge valve.

inspected by the dealer I purchased the vehicle from. There were no prior lamps, messages, or other symptoms until it just showed up while driving one day. It happens at the same time as the engine loses power and acceleration. The check engine light comes on, within 2-3 seconds the engine "dies" and then the "Service stabilitrak" pops up, as well as the warning "Reduced Engine Power". This first appeared on approximately on 05 JUN 2026. Vehicle was purchased on 12 MAY 2026.

codes according to dealer and they are involving engineers. Moving next week on military orders and car is still being worked on with no estimate of time to complete. Insanely concerning safety hazard for a brand new car to shut off on the highway. Could have died or killed others in accident. Unable to invoke lemon law yet but not comfortable driving the car again especially across the country on limited time.

resulted in persistent check engine warnings and noticeable performance concerns, raising questions about emissions compliance and the overall reliability of my vehicle. Given that other vehicles of the same make and model year have been recalled for the same issue, I respectfully request that my vehicle be reviewed for inclusion in the recall. Second, I am formally reporting a malfunction involving the stabilizers. Recently, I have noticed unusual noises and instability when driving, particularly when turning or traveling over uneven surfaces, which indicates a potential stabilizer malfunction. These issues have persisted despite regular maintenance and inspections, affecting the handling and safety of the vehicle. I believe this may represent a manufacturing or design defect that could pose a risk to other owners of the same make and model. I respectfully request that the National Highway Traffic Safety Administration investigate this matter further. I kindly ask the National Highway Traffic Safety Administration to consider expanding the existing recall to encompass additional vehicles affected by this defect. Please advise if you require further information or documentation regarding my case. Sincerely, [[redacted]] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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.

attempt: Connector assembly block * Total out-of-pocket spent: $4,000+ * Despite these repairs, the vehicle continues to shut off unexpectedly while driving. Safety Impact: * Engine shuts off while the vehicle is in motion, creating a risk of collision. * Vehicle is my only mode of transportation. * Dealership has not provided a loaner vehicle. Additional Concerns: * I have discovered forged signatures on my original finance/loan paperwork from the dealership, which I previously reported to the dealership General Manager without response. Requested Action: I request that NHTSA record this safety issue, investigate the repeated engine shutdowns, and consider whether this defect warrants a recall or further manufacturer action. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

of the exhaust pipe. As I tried to reach the curb the car didn't want to move any further as I pushed on the gas. I put it in park and called the tow truck (receipts below) while there were cars passing me by almost causing an accident. I have looked online to see if there was a problem or recall with this vehicle having the same issue I was having. Come to find out there was a recall issued for certain vehicles only, with the same issue as my vehicle. The vehicle was taken into a local auto shop, where they diagnosed it and inspected it. The reports show it has the same exact issues with the car as those that were recalled. No there were not any warning signs nor failure signals. Due to this reason, I was completely caught off guard.

of mine (who is a trainer for GMC) hooked his computer up to it and found no issues. He did find a loose wire which he the reconnected. I was able to drive my car for 6 months before the same thing happened, same situation the vehicle just stopped in the middle of the road only this time I couldn't turn the vehicle off, we had to manually disconnect the battery and again the police came out due to traffic hold up. My car was towed twice afterwards as I could get the car running for a few minutes before another error. To date my car has been sitting in my driveway since March of this year, this time it won't hold a charge and will not even start. Im not sure if this is an engine or an electrical issue. I did call 2 Buick dealerships that told me that it would take about 5 hours to diagnose the issue where I would be charged per hour at the mechanic hourly rate. At this point I think my vehicle needs to be recalled, even if I could get it repaired I dont feel safe driving it. Thankfully it stopped on a minor freeway and no major incidents occurred.

failure had progressively worsened. The vehicle was taken back to the independent mechanic, where it was determined that the failure was related to NHTSA Campaign Number: 20V639000 (Fuel System, Gasoline), and the contact was referred to the dealer for assistance. The vehicle was taken to the dealer to be diagnosed. The vehicle was not yet diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 42,000.