Trailer tow circuit for Chevrolet Chevy Express G2500 (1996-2012)

10 8 9 LO SPD GMLAN HI SPD GMLAN+ BACKUP LAMPS CIRCUIT BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE EXCEPT 5.3L W/ BACKUP ALARM HI SPD GMLAN HOT AT ALL TIMES HOT W/ PRK LAMP LT GRN WIRE LT STOP/ TRN TRLR FUSE 21 LT TRAILER TURN SIGNAL LAMP ORG/ WIRE RED WIRE RED/BLK WIRE RT STOP/ TRN TRLR FUSE 3 RT TRAILER TURN SIGNAL LAMP TAN WIRE TAN/BLK WIRE TRAILER CONNECTOR TRAILER PROVISION (BLUNT CUT) TRLR LT STOP/TRN PCB RELAY TRLR PRK LAMP FUSE 13 TRLR RT STOP/TRN PCB RELAY TRLR WRG FUSE 11 TRLR WRG FUSE 42 UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT(OR BLK) WIRE YEL WIRE