left side speakers not working

I'm new at this posting stuff but my 2005 trailblazers radio is only playing front and rear on the right side. My left side is out. Even when I shift the balance to the left you can just barely here the left speakers. Anyone know if there is a fuse or something and where to start the troubleshooting?

I was also facing the same issue few days ago, can anyone help?

sounds like the speakers or amp on that side are blown

Maybe some cable is out.. check them first...