radio wire& color conde
 

i have a 98 blazer s10 and it has 2speakers in the top by the window and 2 speakers in the front doors and 2 speakers in the back doors and i would like to hook up a new stereo but i cant figure out the color code to hook it up properly it has 3 green wires in the radio harness and some of the wires don't match up to the color code already posted