On a 2025 C8 with front collision warning and braking. I have this option on my window sticker. I have it set in setup to alarm and brake. I have never had any alarm or braking. If I go up fast behind a slower car and don’t brake until I apply brakes I would hit then. Following a car I do get the warning on screen about follow distance. Example 3.0 seconds or lower. Any suggestions I don’t think it is working.