Chevrolet Chevy Express G2500 (1996-2012) (in engine harness, 15 cm from Wiring diagrams

4.8L 6.0L 5.3L AIR BAG FUSE 34 AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) BREAKOUT FOR REAR FUSE BLOCK) BRK SW FUSE 32 BRN WIRE CONNECTOR DK BLU WIRE DOME FLUORESCENT WORK LAMPS FUSE 2 ECM IGN FUSE 48 ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE CONTROL MODULE (ECM) ENGINE CONTROL MODULE (EDM) EXCEPT 4.3L 4.3L FLUORESCENT WORK LAMP RELAY FROM MEGA FUSE 77 (DIAGRAM 2 OF 4) FSCM IGN FUSE 11 FUEL PUMP FLOW CONTROL MODULE FUEL PUMP FLOW CONTROL MODULE (5.3L) HARNESS, 15 CM FROM REAR FUSE BLOCK) HARNESS, 7 CM FROM HARNESS, 8 CM FROM REAR FUSE BLOCK) IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 KEY-IN SWITCH LEFT FRONT ACCESS PANEL RELAY 5 LEFT REAR ACCESS PANEL RELAY 1 LT BLU WIRE OFF ORG/ WIRE PANEL ACTUATOR FUSE 3 PNK WIRE REAR FUSE BLOCK (ON LEFT "B" PILLAR) RED WIRE RED/ WHT WIRE RED/BLK WIRE RIGHT ACCESS PANEL RELAY 6 RUN WIRE RUN/CRNK RELAY 69 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH STR/WHL SNSR FUSE 36 (W/ ACTIVE CONTROL BRAKE) TCM IGN FUSE 47 THEFT DETERRENT MODULE (TDM) TO BODY FUSE BLOCK (DIAGRAM 4 OF 4) TRANS FUSE 51 TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ CARGO W/ POWER BRAKE W/ ACTIVE BRAKE CONTROL W/O RV UPFITTER, MANUAL W/ MANUAL SUPPRESSION SUPPRESSION WHT RED/ WIRE WHT WIRE YEL WIRE

4.8L 6.0L 5.3L AIR BAG FUSE 34 AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) BREAKOUT FOR REAR FUSE BLOCK) BRK SW FUSE 32 BRN WIRE CONNECTOR DK BLU WIRE DOME FLUORESCENT WORK LAMPS FUSE 2 ECM IGN FUSE 48 ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE CONTROL MODULE (ECM) ENGINE CONTROL MODULE (EDM) EXCEPT 4.3L 4.3L FLUORESCENT WORK LAMP RELAY FROM MEGA FUSE 77 (DIAGRAM 2 OF 4) FSCM IGN FUSE 11 FUEL PUMP FLOW CONTROL MODULE FUEL PUMP FLOW CONTROL MODULE (5.3L) HARNESS, 15 CM FROM REAR FUSE BLOCK) HARNESS, 7 CM FROM HARNESS, 8 CM FROM REAR FUSE BLOCK) IGNITION SWITCH INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) INSTRUMENT PANEL CLUSTER (IPC) IP CLSTR FUSE 30 KEY-IN SWITCH LEFT FRONT ACCESS PANEL RELAY 5 LEFT REAR ACCESS PANEL RELAY 1 LT BLU WIRE OFF ORG/ WIRE PANEL ACTUATOR FUSE 3 PNK WIRE REAR FUSE BLOCK (ON LEFT "B" PILLAR) RED WIRE RED/ WHT WIRE RED/BLK WIRE RIGHT ACCESS PANEL RELAY 6 RUN WIRE RUN/CRNK RELAY 69 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH STR/WHL SNSR FUSE 36 (W/ ACTIVE CONTROL BRAKE) TCM IGN FUSE 47 THEFT DETERRENT MODULE (TDM) TO BODY FUSE BLOCK (DIAGRAM 4 OF 4) TRANS FUSE 51 TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ CARGO W/ POWER BRAKE W/ ACTIVE BRAKE CONTROL W/O RV UPFITTER, MANUAL W/ MANUAL SUPPRESSION SUPPRESSION WHT RED/ WIRE WHT WIRE YEL WIRE

AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) BRK SW FUSE 32 BRN WIRE CONNECTOR COOLANT HEATER DK BLU WIRE ECM IGN AIR BAG FUSE 48 FUSE 34 ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE CONTROL MODULE (EDM) FROM MEGA FUSE 77 (DIAGRAM 2 OF 4) GLOW PLUG CONTROL MODULE (GPCM) IGNITION SWITCH INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH INFLATABLE RESTRAINT I/P MODULE INDICATOR KEY-IN SWITCH LT BLU WIRE OFF PNK WIRE RUN WIRE RUN/CRNK RELAY 69 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH STR/WHL SNSR FUSE 36 (W/ ACTIVE CONTROL BRAKE) TCM IGN IP CLSTR FUSE 47 FUSE 30 THEFT DETERENT MODULE (TDM) TO BODY FUSE BLOCK (DIAGRAM 4 OF 4) TRANS FUSE 51 TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION INSTRUMENT CONTROL PANEL MODULE CLUSTER (TCM) (IPC) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ AUXILIARY HEATER W/ MANUAL SUPPRESSION W/O AUXILIARY HEATER W/O RV UPFITTER, MANUAL SUPPRESSION WHT RED/ WIRE WHT WIRE YEL WIRE

2 3 SERIAL DATA SERIAL DATA 5.3L 6.6L 4.8L, 5.3L, 6.0L 4.3L ACC WAKE UP SERIAL DATA 11 15 19 7 6 38 37 5985 2501 2500 2500 2501 2500 2501 ACC WAKE-UP SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER CHIME MODULE (BEHIND LEFT CENTER OF DASH) CONTROL EXCEPT 6.6L W/O ACTIVE BRAKE CONTROL COOLANT HEATER (6.6L) DATA BUS+ DATA BUS+ DATA BUS- DATA BUS- DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DATA LINK RESISTOR DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) ELECTRONIC CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 5.3L EXCEPT 6.6L W/ ACTIVE BRAKE FUEL PUMP FLOW CONTROL MODULE (5.3L) (AT REAR OF GLOW PLUG CONTROL MODULE (GPCM) (6.6L) HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER (IPC) LIGHT DUTY W/O RECREATIONAL VEHICLE, UPFITTER SALES PACKAGE LTR/DLC FUSE 38 RADIO RED WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (IF EQUIPPED) (BEHIND CENTER OF DASH) SERIAL DATA SPLICE PACK TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD PASS THROUGH GROMMET) VEHICLE, ATTACHED TO LEFT REAR FRAME RAIL) W/ AUXILIARY FUEL FIRED HEATER W/ RADIO PROVISIONS W/O AUXILIARY FUEL FIRED HEATER W/O RADIO PROVISIONS WHT WIRE

16 17 19 DATA BUS (-)) DATA BUS (+) DATA ENABLE 19 26 2501 2500 DATA BUS (-) DATA BUS (+) 2 12 DATA BUS (+) DATA BUS (-) DATA BUS (+) DATA BUS (-) 25 18 2500 2501 DATA BUS (+) DATA BUS (-) 4.8L 4.3L, 6.0L, 5.3L 4.8L 6.0L 5.3L 6.6L 6.6L 9 8 10 DATA BUS (-) DATA BUS (+) SERIAL DATA ACC WAKE UP SERIAL DATA 11 15 19 7 6 38 37 ACC WAKE UP SERIAL DATA PNK WIRE ACC WAKE-UP SERIAL DATA AUTOMATIC TRANSMISSION (6 SPEED A/T) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER CONTROL SOLENOID VALUE ASSEMBLY COOLANT HEATER (6.6L, W/ FUEL FIRED AUXILIARY HEATER) DATA BUS - DATA BUS - DATA BUS - DATA BUS+ DATA BUS+ DATA BUS- DATA BUS- DATA COMM ENABLE DATA ENABLE DATA BUS (+) DATA BUS (-) DATA BUS (-) DATA BUS (+) DK BLU WIRE DK GRN WIRE EXCEPT 5.3L EXCEPT AUXILIARY 5.3L 5.3L HEATER IGN DATA BUS (+) DATA BUS (-) LT BLU WIRE TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) (4 SPEED A/T) VEHICLE COMMUNICATION INTERFACE MODULE (VCM) (BELOW STEERING COLUMN) W/ ACTIVE BRAKE CONTROL W/ FUEL FIRED AUXILIARY HEATER W/ FUEL W/O FUEL FIRED FIRED AUXILIARY HEATER W/ VECHILE COMMUNICATION SYSTEM W/O ACTIVE BRAKE CONTROL W/O FUEL FIRED AUXILIARY HEATER W/O VECHILE COMMUNICATION SYSTEM

225 7076 STARTING/CHARGING SYSTEM 23 1786 STARTING/ CHARGING SYSTEM TRANSMISSION SYSTEM 2501 6399 COMPUTER DATA LINES SYSTEM 5985 2500 COMPUTER DATA LINES SYSTEM 6141 2700 2365 1271 419 459 COOLING FANS SYSTEM A/C REFRIGERANT PRESSURE SENSOR ACC WAKE SER DATA SER DATA BUS + AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM BLK/WHT WIRE BLOCK BLU WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM DK BLU WIRE DK GRN/WHT WIRE ECM RELAY CTRL TAC MTR CTRL 1 IGN VOLT EGR MTR HI CTRL LOW REF A/C REFRIG SENS SIG FUEL LEVEL SENSOR SIG ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE OIL PRESSURE GAUGE FUEL GAUGE FUEL LEVEL SENSOR (ON LEFT FRAME RAIL) FUEL PUMP RLY CTRL LOW REF FUEL RAIL TEMPERATURE (FRT) SENSOR (ON TOP LEFT SIDE OF ENGINE) GEN TURN ON SIG CHARGE IND CTRL GENERATOR SIG PARK/NEUTRAL SIG GRN WIRE GRY WIRE IND INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOW ENGINE OIL PRESSURE IND LOW REF LT BLU WIRE LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP MIL CONTROL A/C CLUTCH RLY CTRL ORG/ WIRE ORG/BLK WIRE PNK PNK PNK 1 2 3 WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL SER DATA BUS - TOS SIG TACHOMETER TAN WIRE TAN/BLK WIRE TRANSMISSION SYSTEM VEHICLE SPEED SIG WAIT TO WAIT TO START IND CTRL WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE