I have a 2007 Trailblazer, for awhile I had sound just in ft. passenger speaker today I had sound just in sm. ft dash speakers- have never had bk speakers since i bought it a few months back--- can anyone give me an idea where to start? thank you

 

Speakers might be blown, first check for power, then replace speaker, can get them fairly cheap on Amazon or such.

 

thank I'll check it out this wknd