Chevrolet Cab & Chassis Silverado 3500 HD (2008-2011) 2501 2500 976 computer data lines system Wiring diagrams

2501 2500 976 COMPUTER DATA LINES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CUT) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) FUSE 49 GRY WIRE GRY/BLK WIRE HI SPD GMLAN SERIAL DATA HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REF HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REFERENCE HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY ENERGIZED LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LT BLU WIRE LT BLU/WHT WIRE MISC IGN FUSE 40 MODE SELECT A PTO REMOTE SW SET SIG PTO RELAY COIL CTRL PTO SW INDICATOR CTRL PNK WIRE POWER TAKE OFF (PTO) PROVISION (BLUNT POWER TAKE OFF (PTO) RELAY POWER TAKE OFF (PTO) SWITCH POWER TAKE OFF MODULE (PTO) (OUTSIDE OF RIGHT FRONT CHASSIS FRAME) PPL PPL/WHT WIRE PTO FUSE 44 RED/ WHT WIRE RED/WHT WIRE REMOTE MODE ENABLE SIG PTO ENGAGE SIG PTO RLY ENGAGE SIG RES+ SERIAL DATA ENABLE SET OFF SHUTDOWN SIGNAL TAN WIRE TAN/BLK WIRE TCC BRAKE SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT RED/ WIRE WHT WIRE YEL WIRE

2501 2500 976 COMPUTER DATA LINES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CUT) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXP/PTO FUSE 44 FUSE 49 GRY WIRE GRY/BLK WIRE HI SPD GMLAN SERIAL DATA HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REF HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REFERENCE HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY ENERGIZED LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LT BLU WIRE LT BLU/WHT WIRE MISC IGN FUSE 40 MODE SELECT A PTO REMOTE SW SET SIG PTO RELAY COIL CTRL PTO SW INDICATOR CTRL PNK WIRE POWER TAKE OFF (PTO) PROVISION (BLUNT POWER TAKE OFF (PTO) RELAY POWER TAKE OFF (PTO) SWITCH POWER TAKE OFF MODULE (PTO) (OUTSIDE OF RIGHT FRONT CHASSIS FRAME) PPL PPL/WHT WIRE RED/ WHT WIRE RED/WHT WIRE REMOTE MODE ENABLE SIG PTO ENGAGE SIG PTO RLY ENGAGE SIG RES+ SERIAL DATA ENABLE SET OFF SHUTDOWN SIGNAL TAN WIRE TAN/BLK WIRE TCC BRAKE SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT RED/ WIRE WHT WIRE YEL WIRE

2501 2500 976 COMPUTER DATA LINES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CUT) DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXP/PTO FUSE 44 FUSE 49 GRY WIRE GRY/BLK WIRE HI SPD GMLAN SERIAL DATA HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REF HI SPD SERIAL DATA - HI SPD SERIAL DATA + LOW REFERENCE HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY ENERGIZED LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LT BLU WIRE LT BLU/WHT WIRE MISC IGN FUSE 40 MODE SELECT A PTO REMOTE SW SET SIG PTO RELAY COIL CTRL PTO SW INDICATOR CTRL PNK WIRE POWER TAKE OFF (PTO) PROVISION (BLUNT POWER TAKE OFF (PTO) RELAY POWER TAKE OFF (PTO) SWITCH POWER TAKE OFF MODULE (PTO) (OUTSIDE OF RIGHT FRONT CHASSIS FRAME) PPL PPL/WHT WIRE RED/ WHT WIRE RED/WHT WIRE REMOTE MODE ENABLE SIG PTO ENGAGE SIG PTO RLY ENGAGE SIG RES+ SERIAL DATA ENABLE SET OFF SHUTDOWN SIGNAL TAN WIRE TAN/BLK WIRE TCC BRAKE SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT RED/ WIRE WHT WIRE YEL WIRE