2006 Chevy Impala Stereo Wiring

  I have the wiring diagram for a 2006 Chevrolet Impala the radio harness. I know what a few of the wires are for. The factory harness was cut out when my radio was stolen. I bought an aftermarket harness but some of the wire colors don't match.  I can't figure out what these wires are, they are orange, orange with a black stripe, and one looks like lt blue almost the same colour as the rr speaker wire and where is the accessory wire and switched. I have these wires straight 

Radio 12v.               RED / white   +

radio ground is.     BLACK/ white -

Radio Ingition.       gmlan serial data

Radio Illumination   PURPLE / white 

Factory amp turn on   pink same wirer as your power antenna wirer

Front Left Speaker- Tan(+)  Gray(-)

Front Right Speaker- Light Green(+) Green(-)

Rear Left Speaker-Brown(+) Yellow(-)

Rear Right Speaker- Blue(+) Light Blue(-)