Chevrolet Chevy Express G1500 (1996-2012) Wiring diagram engine performance 4.3l vin x

18 19 20 21 22 23 24 PNK WIRE 2755 1551 1670 1666 1551 1668 1665 REF LOW GND 3-2 SS CTRL REF LOW 439 440 574 PNK WIRE 440 1049 B+ CLS 2 DATA 625 1551 RLY CTRL GND 771 420 776 PRND A SIG BRK SW SIG PRND P SIG PPL 772 633 410 1020 PRND B SIG CMP SIG ECT SIG IGN INJ 2 CTRL INJ 6 CTRL BLK WIRE BLK/WHT WIRE BRN/WHT WIRE CENTRAL SEQUENTIAL FUEL INJECTION (AT TOP OF ENGINE) CKP 1 SIG DK BLU WIRE DK GRN WIRE ENG 1 FUSE 23 ENG 2 FUSE 21 FROM UNDERHOOD PASS- THROUGH GROMMET BREAKOUT) FUSE 39 FUSE 40 GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 6 INJ 1 CTRL INJ 3 CTRL INJ 4 CTRL INJ 5 CTRL KS 1 SIGNAL LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PCM BATT FUSE 2 PNK 1 2 3 4 5 WIRE PNK PNK 25 26 WIRE PNK PNK 6 7 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL PPL PPL/WHT WIRE RANGE B RANGE C IGN B+ REF LOW RED/WHT WIRE REF LOW REF LOW GND 1551 1671 1667 1551 1669 1653 REF LOW REF LOW STARTING/ CHARGING SYSTEM TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE YEL/BLK WIRE

A/C REFRIGERANT PRESSURE SENSOR ACC WAK SER DATA ACCELERATOR PEDAL POSITION (APP) SENSOR (UNDER LEFT SIDE OF DASH) AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM APP SENS 2 SIG IGN VOLT BATT POS VOLT LOW REF PNK WIRE BANK 1 SENSOR 2 BANK 2 SENSOR 2 BLK WIRE BRAKE PEDAL POSITION (BPP) SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE BRN/WHT WIRE CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BATT FUSE 19 ECM IGN/ GLOW PLUG MDL IGN FUSE 30 ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) FUEL PUMP, SENDER ASSEMBLY (ON FUEL TANK) FUEL TANK PRESSURE (FTP) SENSOR (ON FUEL TANK) GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ RUN/ CRNK RELAY 15 ENERGIZED IGN INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOW REF LOW REF PRESS SENS SIG LOW REF PRESS SENS SIG GMLAN SER DATA+ GMLAN SER DATA- BRK SENS SPLY LT BLU WIRE MAF SENS SIG MALFUNCTION INDICATOR LAMP MIL CTRL NCA WIRE ORG/BLK WIRE ORG/WHT WIRE PNK PNK 3 4 WIRE PNK WIRE PPL PPL FUEL LVL SENS SIG PPL/WHT WIRE PRESSURE IND LOW ENGINE OIL PUMP RLY CTRL PWR/TRN RLY CTRL RED/WHT WIRE STARTER RLY CTRL STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TOS SIGNAL TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VSS SIGNAL WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

10 11 PNK WIRE 12 13 14 15 16 17 18 19 PPL 18 19 20 21 22 23 24 PNK WIRE BLK WIRE BRN/WHT WIRE CARGO/ PASSENGER CUTAWAY DK BLU 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 KNOCK SENSOR (ON TOP LEFT REAR OF (ENGINE) LT BLU WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANSMISSION) PNK 1 2 3 4 5 WIRE PNK PNK 25 26 WIRE PNK PNK 6 7 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK PNK WIRE PPL PPL PPL/WHT WIRE TAN WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (ON LEFT SIDE OF THROTTLE BODY) UNDER- HOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BRK APLY SENS SIG BRK SW FUSE 13 CNSTR VENT SOL FUSE 56 DK GRN/WHT WIRE ECM PWR/TRN FUSE 78 ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE OIL PRESSURE (EOP) SENSOR (ON TOP REAR OF ENGINE) EVAP SOL CTRL FUEL PUMP RELAY 38 GAS FUEL PUMP FUSE 24 GRY WIRE HOT AT ALL TIMES HOT W/ RUN/ CRNK RELAY 15 ENERGIZED IAT SENS SIG IGN VOLT INJ FUSE 75 LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MAF/ CNSTR VENT FUSE 64 MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR ODD IGN/INJ FUSE 65 OF ENGINE COMPT) ORG/BLK WIRE PARK/NEUTRAL SIG PNK PNK 3 4 WIRE PNK PNK WIRE PNK WIRE PWR/TRN RELAY 49 RED/WHT WIRE SNSR 1 (PRE)/CLS FUSE 77 SNSR 2 (POST) FUSE 62 STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) TAN WIRE TAN/WHT WIRE TCC BRAKE SIG TOWARDS INSTRUMENT PANEL CLUSTER) TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (ON LEFT SIDE WHT WIRE YEL WIRE

1-2 SOL 10 11 PNK WIRE 12 13 14 15 16 17 18 19 PPL 14 15 16 17 18 19 20 21 PPL 2-3 SOL 22 23 24 PNK WIRE 3-2 SOL A/T FLUID PRESSURE MANUAL VALVE POSITION SWITCH AUTOMATIC TRANSMISSION BLK WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION SENSOR (PART OF DISTRIBUTOR, TOP REAR OF ENGINE) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE OIL PRESSURE (EOP) SENSOR (TOP REAR OF ENGINE) FUEL TANK PRESSURE SENSOR (ON FUEL TANK) GRY DK GRN WIRE GRY WIRE HOT IN RUN, START IGN E FUSE 22 LT BLU WIRE LT BLU/WHT WIRE LT GRN GRY WIRE LT GRN WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (ON TOP RIGHT SIDE OF ENGINE) ORG/ WIRE ORG/BLK WIRE PC SOL VALVE 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/BLK WIRE TAN/WHT WIRE TCC PWM SOL TCC SOL TFT SENSOR UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE YEL/BLK WIRE

AT IGNITION COIL) BANK 1 SENSOR 1 (IN EXHAUST PIPE, IN FRONT OF CATALYTIC CONVERTER) BANK 2 SENSOR 1 (IN EXHAUST PIPE, IN FRONT OF CATALYTIC CONVERTER) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION (CMP) SENSOR (PART OF DISTRIBUTOR, TOP REAR OF ENGINE) CKP SENS SIG CMP SENS SIG CRANKSHAFT POSITION (CKP) SENSOR (ON LOWER FRONT OF ENGINE, NEAR CRANKSHAFT) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (ON LEFT SIDE OF ENGINE) EVAP SOL CTRL GEN ON SIG TAC MTR 2 GEN FIELD SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN IGN VOLT IGNITION CONTROL MODULE (ICM) (ON TOP RIGHT SIDE OF ENGINE) KNOCK SENSOR (KS) 1 KNOCK SENSOR (KS) 2 KS 2 SIG KS 2 SIG LOW REF LOW REF KS 1 SIG KS 1 SIG LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAP SENS SIG LOW REF LOW REF NCA WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK 2 3 WIRE PNK WIRE PNK/BLK WIRE PPL PPL IC 1 CTRL IC 3 CTRL IC 2 CTRL PPL/WHT WIRE RED WIRE SENS SIG STARTING/CHARGING SYSTEM TAC MTR 1 TAN WIRE TAN/WHT WIRE TP SENS 1 ECT SENS SIG TP SENS 2 WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

14 15 16 17 18 19 20 21 PPL 20 21 22 23 24 25 26 27 PPL 22 23 24 PNK WIRE 28 29 30 PNK WIRE 8 9 PNK WIRE BLK/WHT WIRE BRN WIRE CAN VENT FUSE 34 DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES IGN LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PNK 6 7 WIRE PNK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE RED/WHT WIRE SIGNAL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (ON RIGHT SIDE OF TRANSMISSION) WHT WIRE YEL WIRE YEL/BLK WIRE

12 REF GND 20 21 22 23 24 25 26 27 PPL 28 29 30 PNK WIRE 8 9 PNK WIRE A/C REQUEST A/C SYSTEM (W/ FRONT MANUAL CONTROLS) ANTI-LOCK BRAKES SYSTEM CRUISE CONTROL SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CNTRL CRANK FUSE 27 CRUISE CONTROL SYSTEM CRUISE ENGAGED CRUISE INHIBIT DISTRIBUTOR DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG 1 FUSE 23 EVAP CANP CTRL EVAP VENT CTRL MIL CTRL 2-3 SS CTRL 1-2 SS CTRL VSS VSS TFT SENS SIG GEN CYCLE SIG IAC COIL B HI IAC COIL B LOW IAC COIL A LOW IAC COIL A HI GEN IND. GRY WIRE HOT IN RUN, START HOT IN START IDLE AIR CONTROL VALVE (ON LEFT SIDE OF THROTTLE BODY) IGN 1 IGN COIL IGNITION COIL (TOP RIGHT SIDE OF ENGINE) IGNITION CONTROL MODULE (TOP RIGHT SIDE OF ENGINE) 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 MAF SIG MAP SIG MALFUNCTION INDICATOR LAMP NCA WIRE ORG/ WIRE ORG/BLK WIRE PC SOL HI CTRL PC SOL LO CTRL PMP RLY CTRL PCM IGN 1 FUSE 38 PNK 6 7 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL FRONT LOW SIG FRONT HIGH SIG PPL FUEL LEV SIG A/C LOW PRESS PPL PNK PNK WIRE PPL/WHT WIRE PRND C SIG PRESS SENS SIG FUEL PRESS SIG PNK WIRE REF LOW PRESS SENS SIG CRANK VOLT STARTING/ CHARGING SYSTEM STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC SOL CTRL CLU RLY CTRL TP SENS SIG IAT SIG IC TIMING CNTRL UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE