bose audio

Stock Bose system.... At first the bass was lost. Then my front speakers started popping. Now the front speakers wo.t work st all, still pop occasionally. Can barely hear door/key chimes. Then back speakers quit working for short time. Now they're working again. For now.... Help please!!!

I was trying to install an aftermarket radio in my 2010 Tahoe LT so I took out the factory radio and started connecting wires to the new one. I stumbled upon one wire and I am confused for whether it's a steering wheel mounted control wire or anything else. So the first wire is an audio...