I have a 2003 Trailblazer LT when I turn on the radio which is a aftermarket the speakers go in and out most of the time it's on but out of nowhere they turn off I can't find out what's going on nobody knows please help it's so frustrating when I open the back door on the left hand side they will turn on then when I close it they turn off so I disconnected that speaker and then all the speakers would work then out of nowhere all of them turned off again and then turn back on within hours

 

I would check the speaker connections at the aftermarket radio. It might even be the radio itself. When the speakers turn off, do the lights stay lit on the radio?

 

Yes the light stays on and the speakers all work but when I open the door
sometimes all the speakers will turn on and then turn off real quick when I
start closing a little bit but it will work for hours and then all of a
sudden turn off for like an hour I looked online and they said online that
Trailblazers have a problem with the wiring I guess it was a recall or
something would I be able to rewire the radio directly to the battery and
rewire all the speakers directly to the radio for it to start working
correctly I'm not sure what to do all I want is a working radio and also
would it have anything to do with the harness I had it installed at a
stereo shop which does good work I'm just confused I don't want to keep
spending money after money not knowing what the problem is