I have a 2005 Chevy Cobalt LS, completely stock radio, I don't have the Pioneer System, I don't have On-Star. I have a 12 Inch Rockford Fosgate P3 Subwoofer, Sony Xplode Amplifier, and an 8 Gauge wiring Kit. I need to connect a Hi-Lo converter to the rear speakers, and need to connect the...
