I was not assisted with setting up OnStar on the day of purchase, which was at the end of September 2024. The next day, when I was unable to set it up myself, I contacted the dealer and was sent numerous links to set it up. However, it has never worked and has been to the Service department twice. The first visit was on October 19, 2024, and I waited for one month for parts that never arrived. They informed me that the parts were on backorder, and since the vehicle was drivable, I chose to pick it up. However, the radio went completely out on December 19, 2024, and I was instructed to bring the vehicle back to the dealer because the parts had finally arrived. I was provided with a loaner, and the vehicle has been at the dealer ever since. I reached out to them on week three to inquire about the estimated time of completion for the new radio system installation and was informed that additional parts needed to be ordered, which would take seven more days. I followed up 10 days later and was told that the part had still not arrived