2003 Yukon Stereo no sound, amp is fine.

[ResidentAlien]

I have a 2003 Yukon XL 2500. The radio started to cut in and out, and then soon gets to the point where there is no audio at all. No chimes and no radio. However the rear radio headphones still work. Thus I thought this was the bose amp and changed the amp. The new amp made no difference until I pulled both fuses and checked everything. I put the fuses back in and I had sound. Great. 2 hours later on the new amp the radio started to cut out again and then I had no sound. No chimes, no radio.

 

I can restore the radio sound by pulling the radio fuse for 5 minutes, plugging it back in and all audio is restored. This does not last long and soon I will be back to no audio at all. It is not the amp as a brand new amp does the exact same thing. So how do I figure out what is wrong? I don't want to start replacing things as that did not go well with the amp. I have read that maybe there is a bad speaker, but since the speakers plug into the amp a bad speaker should only impact the amp. Also since the audio starts to cut in and out many times (longer each time) until there is no audio at all I can't imagine a bad speaker causing that. Once the speaker is detected it should cut the audio off until reset.

 

Only pulling the radio fuse, waiting and then putting it back, will restore the audio. Is the radio bad? I pulled the codes and there seems to be nothing for the radio once the audio is lost.

 

Thanks for any help!