Audio Systems: stereo wiring 2002 chevy tahoe, electric antenna, chevy tahoe

Question
I put a new stereo in my tahoe and the only thing thay puts out music is my tuner why wont the cdplayer, usb port, or aux port put out music i see this 1 purple wire from factory wiring that isnt making contact with new harness culd that b the problem

Answer
Because you made a mistake with the wiring, blue wires, you are using the electric antenna wire to turn on the factory amplifier, the antenna is used only on am/fm if you change to a different source the antenna goes down, since there is no power in that wire the amplifier is off, there is a second blue wire for external amplifier, use that and everything will work
good luck