2019 Buick Enclave POWER TRAIN,ELECTRICAL SYSTEM

What component or system failed or malfunctioned, and is it available for inspection? The issue appears to be related to the auto start-stop system and/or an EVAP-related component, as the vehicle will sometimes completely shut off instead of restarting when stopped. The vehicle is available for inspection upon request. How was your safety or the safety of others put at risk? When the engine shuts off, the vehicle loses all power, including steering and brake assist. This has happened at red lights, stop signs, and in school zone traffic. I have to restart the vehicle while stopped in active traffic lanes, which puts me and others at high risk of being hit. I am a single mom with 3 young children. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. A Buick dealership inspected the vehicle earlier this year. They observed the stalling issue but could not identify a single cause. They suggested possible repair attempts, but the issue has continued. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? It has only been inspected by a Buick dealership service department. No other agencies have inspected it. Were there any warning lights, messages, or other symptoms prior to the failure? When did they first appear? No warning lights or messages appeared when it first happened. The problem began before I replaced the battery, and replacing the battery did not resolve the issue. Additional Description: When I come to a stop—at red lights, stop signs, or in traffic—the vehicle’s auto start-stop system activates like normal, but instead of restarting, the engine will completely shut off. I then lose power steering and braking support and must restart the car in the middle of the roadway. It is unpredictable and unsafe. Sometimes it’s instantly but today I sat there for 15 minutes waiting. I took it straight to autozone and everything tested good.

On the morning of October 25, 2021 at approximately 7:05 am, I was fixing to leave to go to work. The carport light was on, so I open the door to my car, slid into the driver’s seat, started the car up and the lights came on. As I was starting to get out of the car to go turn the carport lights off, I realized the car was going backwards. I tried to get back into the driver’s seat to try to stop the car but I was unable to do so. The door knocked me down on the concrete floor of the carport and the front left tire ran over both my legs. The car continued to go backwards, the door hit the column between the carport bays but continued to travel backwards down our approx. 11-foot paved drive way, crossed the dirt road and stopped when the back of the car went into the deep ditch that runs along the dirt road at that point. When my husband arrived, the car was still running and the lights were on. The man driving the wrecker for the local EMA Director and my husband all looked at the gear shift and the car was in PARK.