I have a 2015 and I installed a Hilow converter so I have an amplifier for the speakers and an amplifier for my subwoofers. Everything has been working fine. Now I have no sound coming out of any of my speaker. no beeping noise for stereo function. No sound when I get a phone call. And all functions on the head unit work perfect. Has anyone else had this problem?

Second question has anyone upgraded to an aftermarket stereo which will still let me use my lane change camera and backup camera? And if so, which stereo and what parts will I need to upgrade. Thanks for all the help and I appreciate everyone on these forms. Thank you.