1967 67 Chevy Impala “SS” Horn Button Center Cap GM factory original Chevrolet super sports steering wheel horn button/center cap clean condition has pitting marks not bad $60. 1967 67 Chevy Impala Radio Wiring Harness w/ fader control GM factory Chevrolet original radio wiring harness with fader control switch the balance between the front and rear speakers for super sport Chevrolet cars. The fader switch slides onto the passenger shaft of the radio the chrome knob same style as a toner inner knob slides on to the fader control switch in excellent working order. All wires ends are label $85.