I have no sound in my rear speakers and only highs coming out of both front speakers. At times only highs coming out of my driver side. Please help. I have heard amp. and also bad speakers. Any ideas?

 

Most likily it is bad speakers. GM used garbage $10 chinese speakers in these and they will eventually go bad . I have replaced all 4 of mine with quality Pioneer speakers and have never had another problem .

 

Depends on the audio system you have installed in the TB. I have the Bose 'Professional' version, which only has 2 line input, so the volume of the back speakers can not be controlled separately. So make sure you listen to them and not determine they don't work based on the fader.

I removed the rear speakers and cleaned up the connections, the 2 ohm resistance of the Bose speakers was correct outside the connector, but not on the inside. Just some cleaning spray and some fresh solder did the trick for me.