Chevrolet Chevy Express G2500 (1996-2012) yel Wiring diagrams

54 49 22 33 (DIESEL) (GASOLINE) ABS PUMP ABS/TCC SW ABS/VSES FUSE 48 ANTI-LOCK IND BLK WIRE BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRAKE FLUID LEVEL SW IN LEFT FRONT SENSOR (+) RIGHT FRONT SENSOR (-) VSS INPUT BRAKE FLUID LEVEL SWITCH (HEAVY DUTY) (ON BRAKE MASTER CYLINDER RESERVOIR) BRAKE IND BRKS FUSE 11 BRN WIRE CRUISE CONTROL SYSTEM DIESEL DK GRN WIRE GAS GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START IGN E FUSE 22 INSTRUMENT PANEL CLUSTER LEFT FRONT SENSOR (-) RIGHT FRONT SENSOR (+) BRAKE INPUT LEFT FRONT WHEEL SPEED SENSOR (ON INSIDE OF LEFT FRONT WHEEL) LOGIC LT BLU WIRE PNK WIRE PPL PPL DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) RED/BLK WIRE RIGHT FRONT WHEEL SPEED SENSOR (ON INSIDE OF RIGHT FRONT WHEEL) SERIAL DATA IGNITION STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) TAN WIRE TCC BRAKE SW TRANSMISSION CONTROL MODULE (TCM) (LEFT FRONT CORNER OF ENG COMPT) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENG COMPT) VEHICLE SPEED SENSOR (VSS) VSS HIGH VSS LOW VSS OUTPUT YEL WIRE YEL/BLK WIRE

ABS/TCC SWITCH ABS/TCS CLASS 2 SERIAL DATA YAW RATE SENSOR LO REF WHEEL POS SENS LOW REF ABS/VSES FUSE 48 AUXILIARY 1 FUSE 32 BLK WIRE BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRAKE IN BRKS FUSE 11 BRN WIRE DEL TORQUE DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) GRY WIRE HOT AT ALL TIMES HOT IN HOT IN RUN OR START IGN E FUSE 22 IGNITION 3 VOLT LATERAL ACCELEROMETER SIG LEFT FRONT WHEEL SPEED SENSOR (ON INSIDE OF LEFT FRONT WHEEL) LEFT REAR WHEEL SPEED SENSOR (AT LEFT REAR OF WHEEL HUB) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/BLK WIRE PNK 1 2 WIRE PNK WIRE POWER DISTRIBUTION SYSTEM POWERTRAIN CONTROL MODULE (PCM) (IN ENG COMPT, ON LEFT INNER FENDER) PPL PPL UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) PPL/WHT WIRE PRECHARGE MOTOR LO BATTERY (+) GND PRECHARGE MOTOR HI PRECHARGE PUMP (AT LEFT FRONT OF FRAME RAIL) RED WIRE REQ TORQUE REQUEST TORQUE SIGNAL DELIVERED TORQUE SIGNAL RIGHT FRONT WHEEL SPEED SENSOR (ON INSIDE OF RIGHT FRONT WHEEL) RIGHT REAR WHEEL SPEED SENSOR (AT RIGHT REAR OF WHEEL HUB) RUN WIRE STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON RIGHT SIDE OF TRANSMISSION) VSES MOTOR VSS HIGH VSS LOW VSS OUTPUT WHT WIRE YEL WIRE YEL/BLK WIRE

ABS IND. BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (ON BRAKE MASTER CYLINDER RESERVOIR) BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON BRAKE VALVE, NEAR FRONT OF EBCM) BRN WIRE CAUTION IND DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE GROUND GRY WIRE HEAVY DUTY HOT IN RUN OR START IGN 3 VOLTAGE INSTRUMENT PANEL CLUSTER LIGHT DUTY LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NOT READY IND ORG/BLK WIRE PCM IGN 1 FUSE 38 PNK 1 2 WIRE PNK WIRE PPL SENSOR SELF TEST SIG CIR STEERING WHEEL POS MARKER PULSE SIG STEERING WHEEL POSITION SENS SIG 1 STEERING WHEEL POSITION SIG A STEERING WHEEL POSITION SIG B STEERING WHEEL SPEED/ POSITION SENSOR (AT BASE OF STEERING COLUMN) TRACTION CONTROL SWITCH UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE YAW RATE FREQUENCY YAW, LATERAL ACCELERATION SENSOR (UNDER FRONT PASSENGER SEAT) YEL WIRE

BLK WIRE BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) CLASS 2 CLASS 2 (PCM) DATA COMPUTER DATA LINES SYSTEM CRUISE IND DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE GRN WIRE GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN, START IGN IGN E FUSE 22 INSTRUMENT PANEL CLUSTER LT BLU WIRE NCA WIRE ON CRUISE CONTROL ON/OFF SWITCH OFF ON OFF ORG/BLK WIRE PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL VSS LOW RED/WHT WIRE RESUME/ ACCEL RESUME/ACCEL SET/ COAST STOP LP FUSE 7 STOP/ CHMSL FUSE 8 STOPLAMP SWITCH (ABOVE BRAKE PEDAL) THROTTLE ACTUATOR CONTROL (TAC) MODULE (AT LEFT REAR OF ENGINE COMPARTMENT) TURN SIGNAL/ MULTIFUNCTION SWITCH UART SERIAL DATA UART SERIAL DATA UART SERIAL DATA UART SERIAL DATA SERIAL DATA 14 58 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON RIGHT SIDE OF TRANSMISSION) VSS HIGH WHT WIRE YEL WIRE

1744 846 INJ 1 CTRL INJ 6 CTRL 2755 1551 1670 1666 1551 REF LOW GND 2762 469 REF LOW REF LOW 5605 440 1049 710 2752 632 FICM STATUS B+ CLS 2 DATA CLS 2 DATA REF LOW REF LOW 771 420 776 PRND A SIG BRK SW SIG PRND P SIG PPL 772 633 410 1020 845 PRND B SIG CMP SIG ECT SIG IGN INJ 5 CTRL INJ 8 CTRL BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENG 1 FUSE 23 ENG 2 FUSE 21 ENGINE OIL LEVEL SWITCH (RIGHT SIDE OF OIL PAN) FROM UNDERHOOD PASS- THROUGH GROMMET BREAKOUT) FUEL GAUGE SELECT SWITCH FUSE 39 FUSE 40 GND 1668 1665 1174 GRY WIRE HEAD- LAMP SWITCH HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 6 KNOCK SENSOR 1 (BELOW FRONT OF INTAKE MANIFOLD) KNOCK SENSOR 2 (BELOW REAR OF INTAKE MANIFOLD) KS 1 SIGNAL KS 2 SIGNAL CKP 1 SIG FRPS PWM SIG LPL RLY CTRL INJ 7 CTRL INJ 4 CTRL LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE OIL LEV SW SIG ORG/ WIRE ORG/BLK WIRE PCM BATT FUSE 2 PNK 1 2 3 4 5 WIRE PNK PNK 36 37 WIRE PNK PNK 6 7 8 9 10 11 12 13 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL FGAUGE SEL SIG PPL PPL PPL PPL 41 42 43 44 45 PPL/WHT WIRE RANGE B RANGE C IGN B+ REF LOW RED/WHT WIRE REF LOW REF LOW GND 1551 1671 1667 1551 1669 1664 5607 RLY CTRL GND STARTING/ CHARGING SYSTEM TAN WIRE TAN/WHT WIRE UNDER- HOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

20 21 PNK WIRE BLK WIRE BRN/WHT WIRE CARGO/ PASSENGER CUTAWAY DK BLU WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE SENSOR (ON LEFT SIDE OF ENGINE) FUEL PUMP FUSE 12 FUEL PUMP RELAY FUEL PUMP/ SENDER ASSEMBLY (IN FUEL TANK) GRY WIRE HEATED OXYGEN SENSOR (BANK 1 SENSOR 1) (IN EXH PIPE, FRONT OF CAT CONVERTER) HEATED OXYGEN SENSOR (BANK 1 SENSOR 2) (IN EXH PIPE, REAR OF CAT CONVERTER) HEATED OXYGEN SENSOR (BANK 2 SENSOR 1) (IN EXH PIPE, FRONT OF CAT CONVERTER) HEATED OXYGEN SENSOR (BANK 2 SENSOR 2) (IN EXH PIPE, REAR OF CAT CONVERTER) HOT AT ALL TIMES HOT IN ACC, RUN, START LOW PRESSURE LOCK-OFF RELAY LOW PRESSURE LOCK-OFF SOLENOID (ON RIGHT SIDE OF FUEL RAIL) LPL FUSE 35 LT BLU WIRE LT BLU/BLK WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PARK/ NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANS- MISSION) PNK 1 2 3 4 5 WIRE PNK PNK 36 37 WIRE PNK PNK 6 7 8 9 10 11 12 13 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK PNK WIRE PPL PPL 41 42 43 44 45 PPL/WHT WIRE TAN WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (ON LEFT SIDE OF THROTTLE BODY) UNDER- HOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SOL 2-3 SOL 20 21 PNK WIRE 25 26 27 28 29 30 31 32 PPL 33 34 35 PNK WIRE A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSAXLE BLK WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR (TOP REAR OF ENGINE) CNG FUEL TANK PRESSURE SENSOR CNG FUEL TANK TEMPERATURE SENSOR DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE OIL PRESSURE (EOP) SENSOR (TOP REAR OF ENGINE) FUEL TANK PRESSURE SENSOR (IN FUEL TANK) GRY DK GRN WIRE GRY WIRE HOT IN RUN, START IGN E FUSE 22 LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN GRY WIRE LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP REAR OF ENGINE) ORG/ WIRE ORG/BLK WIRE PC SOL VALVE PNK 5 6 WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE REV STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TAN WIRE TAN/WHT WIRE TCC PWM SOL TFT SENSOR UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE

12 13 14 15 16 PNK WIRE 25 26 27 28 29 30 31 32 PPL 33 34 35 PNK WIRE AF ENABLE AF INJ 1 CNTL AF INJ 2 NTL AF INJ 3 CNTL AF INJ 4 CNTL AF INJ 5 CNTL AF INJ 6 CNTL AF INJ 7 CNTL AF INJ 8 CNTL BLK WIRE BLK/WHT WIRE BRN WIRE CNG FUEL INJECTOR 1 GASOLINE FUEL INJECTOR 1 CNG FUEL INJECTOR 2 CNG FUEL INJECTOR 3 DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENG 2 FUSE 21 FICM STATUS FRONT HIGH PRESSURE LOCK-OFF SOLENOID FRPS PWM OUT FRPS SIG FRTS PWM OUT FRTS SIG GAS INJ 1 CNTL GAS INJ 2 CNTL GAS INJ 3 CNTL GAS INJ 4 CNTL GAS INJ 5 CNTL GAS INJ 6 CNTL GAS INJ 7 CNTL GAS INJ 8 CNTL GASOLINE FUEL INJECTOR 2 GASOLINE FUEL INJECTOR 3 CNG FUEL INJECTOR 5 GASOLINE FUEL INJECTOR 5 CNG FUEL INJECTOR 7 GASOLINE FUEL INJECTOR 7 GROUND GRY WIRE HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 6 IGN POS VLT INJ 1 SIG INJ 2 SIG INJ 3 SIG INJ 4 SIG INJ 5 SIG INJ 6 SIG INJ 7 SIG INJ 8 SIG INLINE FUSE LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MID FRAME HIGH PRESSURE LOCK-OFF SOLENOID ORG/ WIRE ORG/BLK WIRE PNK 5 6 WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE REAR HIGH PRESSURE LOCK-OFF SOLENOID (LHT W/ CUTAWAY) (LEFT REAR OF VEHICLE) TAN WIRE TAN/WHT WIRE UNDER- HOOD FUSE BLOCK ENG 1 FUSE 23 YEL WIRE YEL/BLK WIRE

10 11 PNK WIRE 12 13 14 15 16 PNK WIRE 25 26 27 28 29 30 31 32 PPL 27 28 29 30 31 32 33 34 PPL 35 35 36 37 PNK WIRE BLK/WHT WIRE BRN WIRE CAN VENT FUSE 34 CNG FUEL INJECTOR 4 CNG FUEL INJECTOR 6 DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE FUEL LAMP IND FUEL RAIL TEMPERATURE SENSOR GASOLINE FUEL INJECTOR 4 GASOLINE FUEL INJECTOR 6 CNG FUEL INJECTOR 8 GASOLINE FUEL INJECTOR 8 GRY WIRE HEADLAMP SWITCH HOT AT ALL TIMES HOT IN ACC, RUN, START HPL 1, 3 FUSE 63 HPL MAIN FUSE 35 HPL RELAY 62 IGN LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE RED/WHT WIRE SIGNAL TAN WIRE TAN/WHT WIRE UNDER- HOOD FUSE BLOCK VEHICLE SPEED SENSOR (ON LEFT SIDE OF TRANSMISSION) WHT WIRE YEL WIRE YEL/BLK WIRE

10 11 PNK WIRE 27 28 29 30 31 32 33 34 PPL 35 36 37 PNK WIRE A/C REQUEST A/C SYSTEM (W/ FRONT MANUAL CONTROLS) AFO ENABLE PC SOL HI CTRL ANTI-LOCK BRAKES SYSTEM CRUISE CONTROL SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLU RLY CTRL CRANK FUSE 27 CRUISE CONTROL SYSTEM CRUISE ENGAGED FTP SEN IN GEN IND CRUISE INHIBIT CTRL DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENG 1 FUSE 23 EVAP VENT CTRL MIL CTRL 2-3 SS CTRL 1-2 SS CTRL VSS VSS TFT SENS SIG FTTS INPUT GEN CYCLE SIG IAC COIL B HI IAC COIL B LOW IAC COIL A LOW IAC COIL A HI GRY WIRE HOT IN RUN, START HOT IN START IC 8 CTRL IC 2 CTRL IC 5 CTRL IC 3 CTRL IDLE AIR CONTROL VALVE (ON LEFT SIDE OF THROTTLE BODY) IGN IGN FEED GND IGNITION COILS INSTRUMENT PANEL CLUSTER LOGIC LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MALFUNCTION INDICATOR LAMP NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PC SOL LO CTRL PMP RLY CTRL PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL FUEL LEV SIG A/C LOW PRESS PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE REF LO SPARK PLUG STARTING/ CHARGING SYSTEM STARTING/CHARGING SYSTEM TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/BLK WIRE