NHTSA Complaint #11543559 — 2021 CHEVROLET SILVERADO 3500

When I shift the vehicle to park and turn it off, about 90% of the time the instrument panel will display a message that says “Shift to park”, and the electrical components will not shut down. The vehicle is in park, but the computer won’t detect it. I took it to dealer while under warranty, and dealer simply stated that it wasn’t happening. It continues to happen, and I fear that it it won’t shift into park later. As is, sometimes it takes an hour or more to detect that the vehicle is in park. I fear that it will cause a dead battery and leave me stranded. I don’t know if this is a computer issue or a transmission issue. It has been ongoing for at least 10 months. Vehicle was dropped off for repair at dealer in December, 2022, but no repair was performed.