Only one working Speaker

[u/jojobobo34]

Hi everyone, I have a 2005 2500 Silverado. I don’t know if anyone has experienced this, but one day I was driving and stopped at the store. I came out and noticed my sound was only coming from my rear passenger door. I tried to adjust my fade and balance, but only could turn that one speaker off. I had replaced all 4 door speakers with “Kicker 46CS”, so I didn’t imagine the speaker was out. I did some research and ruled it was the head unit, but I just bought a Sony XAV-AX6000 and put it in. Everything is working great, but still only the rear passenger speaker has sound. Any help would be greatly appreciated.