I have spent many hours researching and looking as well as my truck at a dealership for months. I had a short. Long story short it has a new instrument cluster, BCM, CD Player, radio control module, and bose amp. The issue is only 1 speaker works. It is the rear driver and when you fade it to the front driver it gets louder. Faded to any other position it does not work at all. I am at a total loss. Any thoughts or wisdom at all would be great.