Viking... my advice... don't go running to the dealer for every little thing complaining of issues. The dealership will get annoyed by you and it will result in poorer service from them in the future. In this case for example, you don't even know that a dashcam installation had any issue because you never listened to the stereo at that volume before. Does it make sense for a dash cam installation to cause your radio to sound distorted at high volume levels? Or is it just that it's a low power stereo system so it doesn't have the power to sound clean at high power levels?