I have 2012 LaCrosse and the radio has power but no sound. I noticed that the turn signals don't have any sound either. The radio will come on for a few seconds then the sound stops. Can someone please help

 

The only things you can do are check that the connections to the radio are tight and the antenna connection is good. Without some special equip, your best bet is a radio repair shop or maybe a dealership that will most likely do what was suggested and then if that doesn't work either replace the radio or send it out for repair.

 

The reverse camera alarm, door chime, and turn signal noise all stop after a few seconds as well. I changed the fuse to the radio and will troubleshoot the rest and see what I come up with