Radio circuit, without rear seat audio for Chevrolet Chevy Express H2500 (2003-2003)

2 1 VOICE LOW REF VOICE SIGNAL ANTENNA ANTENNA IN BLK/WHT WIRE CELL PHONE REF CELL PHONE SIG CLASS 2 DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE HOT AT ALL TIMES LEFT FRONT DOOR SPEAKER LEFT FRONT DOOR TWEETER SPEAKER LF SPEAKER (+) LF SPEAKER (-) RR SPEAKER (-) RR SPEAKER (+) GROUND BATTERY LR SPEAKER + LR SPEAKER - RF SPEAKER - RF SPEAKER + LT BLU WIRE LT BLU/BLK WIRE NCA WIRE NOT USED ORG/ WIRE RADIO RADIO BAT FUSE 1 RED/WHT WIRE RIGHT FRONT DOOR SPEAKER RIGHT FRONT DOOR TWEETER SPEAKER TAN WIRE UNDERHOOD FUSE BLOCK WHT WIRE