On a 2002 duramax when you pull out the light dimmer switch console is the blue wire with white trace the gauge illumination wire? Also where is the best place to tie in a wire tap for power? On my installation instructions it only listed for an 2006 duramax and it say's to tap into yellow wire on the 3rd row column on the box under the dash buy the brake pedal. Any input on what color the wire would be on a 2002. Also what's the best place to tap the boost line probe on a 2002? Pictures if you have them