My wife has a 09 cobalt LT. She wanted a new system in her car and I told her id do the install to save money as I have 14 times before including my bmw witch I imagined would be harder. I was wrong I am wiring without the harness because she said she doesnt need all the chimes. Ive got all the speakers wired up correctly but I have NO SOUND! anyone have any ideas? If I cant get this done and have to pay for a harness my wife will KILL ME!