If the bose system amp output uses the same as every other gm ever then its
LF Speaker +/- tan - gray
RF Speaker +/- lt. green - dk. green
LR Speaker +/- brown - yellow
RR Speaker +/- dk. blue - lt. blue
I'm after the line signal wires from the head unit to the Bose amplifier and the amp turn-on wire as well, at the wiring harness connectors that go to the Bose amp.