I purchased a 2025 Silverado 1500 LTZ. Most often the grid lines for the backup camera are not visible. I also noticed an hourglass at the top left corner of the camera display. The button to enable grid lines is grayed out. Now, on a rare occasion the system loads, the hour glass is gone and the grid lines are visible as it should be. I took it to the dealership and they didn’t know what to do about it and said “give it some time”, so I waited a month and as expected no change. I called the dealership again and they said to call GM Customer Support. GM Customer Support said to take it to the dealership so they could open a case. I now have another appointment, but I have zero faith that anybody has a clue what to do.