PAC C2A-GM24 Amplifier Interface for GM: * Add any aftermarket amplifier to GM SUVs and trucks that have a Class II premium Bose amplifier * Takes the full-range, fixed-level output from the factory radio and varies the line level output up and down proportionally with the factory amplifier * Converts the fixed level audio signals from the factory head unit and gives user a 2-channel, full-range, variable audio output * Independent left and right adjustment to fine tune the aftermarket amplifier to the factory system * Output balances left and right along with factory radio * Includes +12V remote turn-on wire