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

2 6 3 1 CAN BUS HI LO REF CAN BUS LO 32 33 34 35 36 37 38 VEHICLE SPD SIG CAN BUS HI DATA 5.3L, 4.8L, 6.0L 4.3L ABS MDL FUSE 2 ABS MTR FUSE 1 BLK WIRE BLK/PPL WIRE BRK SW FUSE 13 BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DIESEL DIESEL GASOLINE DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) FUSE 29 GASOLINE GRY WIRE GRY/BLK WIRE HI SPD GMLAN DATA + HI SPD GMLAN DATA + B+ HI SPD GMLAN DATA- HI SPD GMLAN DATA- GND HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY 15 ENERGIZED IPC FUSE 10 LEFT FRONT WHEEL SPEED SENSOR (WSS) (ON INSIDE OF LEFT FRONT WHEEL) LEFT REAR WHEEL SPEED SENSOR (WSS) (AT LEFT REAR WHEEL HUB) LF WHEEL SPD SENS LOW REF LOW REF LOW REF RF WHEEL SPD SENS LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT FRONT WHEEL SPEED SENSOR (WSS) (ON INSIDE OF RIGHT FRONT WHEEL) SERIAL DATA ENABLE B+ STEERING ANGLE SENS CAN BUS LO DATA STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) STR/WHL/ SNSR TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SIGNAL WHT WIRE WHT/BLK WIRE YAW, LATERAL ACCELERATION SENSOR (UNDER FRONT PASSENGER SEAT) YEL WIRE YEL/BLK WIRE

3 21 DIMMING CTRL TRACTION SW 6 16 TCC BRAKE SIG PRK BRK SW ABS IND. BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRAKE BOOSTER FLUID FLOW ALARM SWITCH (IN POWER STEERING PUMP OUTLET HOSE) BRAKE FLUID LEVEL SWITCH (AT LEFT REAR OF ENGINE COMPT) BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON BRAKE VALVE, NEAR FRONT OF EBCM) BRAKE WARNING INDICATOR CTRL BREAKOUT TOWARDS INSTRUMENT PANEL CLUSTER) BRK FLUID LEVEL SENSOR SIG BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE GRY WIRE HEAVY DUTY IGN VOLT IGN VOLT STEERING SENS A STEERING SENS C INSTRUMENT PANEL CLUSTER (IPC) LIGHT DUTY LO SPD GMLAN LOGIC LOGIC STEERING WHEEL SPEED/ POSITION SENSOR (AT BASE OF STEERING COLUMN) LOW STABILITY IND LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE ORG/BLK WIRE PARK BRAKE SWITCH (UNDER LEFT PNK 7 3 5 6 2 4 1 8 WIRE PNK WIRE PPL RIGHT REAR WHEEL SPEED SENSOR (WSS) (AT RIGHT REAR WHEEL HUB) SERIAL DATA SIDE OF DASH) STEERING SENS B TAN WIRE TAN/WHT WIRE TRACTION CONTROL SWITCH VDC IND WHT WIRE YEL WIRE

5.3L 5.3L EXCEPT 5.3L A/C REFRIGERANT PRESSURE SENSOR ACC SER DATA IGN VOLT BATT POS VOLT PNK WIRE ACCELERATOR PEDAL POSITION (APP) SENSOR (UNDER LEFT SIDE OF DASH) ANTI-LOCK BRAKES SYSTEM BANK 1 SENSOR 2 BANK 2 SENSOR 2 BLK LT BLU/ WIRE BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION (BPP) SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BREAKOUT) BRK SENS SPLY BRK SW FUSE 13 BRN WIRE COMPUTER DATA LINES SYSTEM CUTAWAY 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) ENGINE COOLANT RADIATOR TEMPERATURE SENSORS 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 IAT SENS SIG LOW REF ECT SENS SIG LOW REF LOW REF PRESS SENS SIG PPL LT BLU WIRE LT BLU/ BLK WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE MAF SENS SIG LOW REF ORG/BLK WIRE ORG/WHT WIRE PNK (OR PNK) 5 6 7 WIRE PNK IGN VOLT WIRE PNK PPL 2 3 4 WIRE PNK WIRE PPL PPL FUEL LEVEL SENS PPL/WHT WIRE PRESS SENS SIG LOW REF PWR/TRN RLY CTRL RED/WHT WIRE RELAY CTRL START RLY CTRL STARTING/ CHARGING SYSTEM STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC BRAKE SIG TOWARDS INSTRUMENT PANEL CLUSTER) TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VSS WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

4.8L/6.0L 5.3L BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLUTCH RLY CTRL CNSTR VENT SOL FUSE 56 COMPT) COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ECM PWR/TRN FUSE 78 ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EVAP SOL CTRL EVAPORATIVE EMISSION (EVAP) CANISTER VENT SOLENOID (NEAR FRONT OF FUEL TANK) EVEN IGN/ INJ FUSE 79 FUEL PUMP RELAY 38 (4.8L/6.0L) GAS FUEL PUMP FUSE 24 GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES IC 1 CTRL IC 2 CTRL IC 3 CTRL IC 4 CTRL IC 5 CTRL IC 6 CTRL IC 7 CTRL IC 8 CTRL IGN INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOW ENGINE OIL PRESSURE IND LOW REF LT BLU WIRE LT BLU/WHT WIRE MAF/ CNSTR VENT FUSE 64 MALFUNCTION INDICATOR LAMP MIL CTRL ODD IGN/INJ FUSE 65 ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK 5 6 7 (OR PNK) WIRE PNK PNK PNK PNK PNK PNK PNK PNK PNK 4 5 6 7 8 9 10 11 12 WIRE PNK PNK PPL 15 16 17 18 19 20 21 22 23 24 WIRE PNK PPL 2 3 4 WIRE PNK WIRE PPL PPL/WHT WIRE PWR/TRN RELAY 49 RED/WHT WIRE SNSR 1 (PRE)/CLS FUSE 77 SNSR 2 (POST) FUSE 62 TOS SIG TRANSMISSIONS SYSTEM AIR CONDITIONING SYSTEM UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE WHT WIRE YEL WIRE

1786 5985 TRANSMISSIONS SYSTEM COMPUTER DATA LINES SYSTEM 2759 3108 7493 2500 440 5991 2364 23 6141 6399 1439 COMPUTER DATA LINES SYSTEM AIR CONDITIONING SYSTEM APP SIG 1 5 VOLT REF 5 VOLT REF BLK WIRE BREAKOUT TOWARDS INSTRUMENT PANEL CLUSTER) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM 439 492 225 1272 COOLING FANS SYSTEM CRUISE/ETC/TCC BRK SIG CUTAWAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXHAUST TEMPERATURE SENSOR 2 EXHAUST TEMPERATURE SENSOR 3 (MIDDLE OF DIESEL PARTICULATE FILTER) EXHAUST TEMPERATURE SENSOR 4 GRY WIRE GRY/BLK WIRE INJ HIGH CTRL A/C CLUTCH RLY CTRL LOW REF LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MASS AIR FLOW (MAF)/INTAKE AIR TEMP (IAT) SENSOR (ATTACHED TO AIR INTAKE DUCT) NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK IGN 1 VOLT AIR FLOW SENS SIG GENERATOR TURN ON SIG LOW REF WIRE PNK PNK WIRE PNK WIRE PPL PPL 28 29 PPL PNK WIRE RED/WHT WIRE STARTING/ CHARGING SYSTEM STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE WHT LT BLU/ WIRE WHT WIRE WHT/ DK BLU WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

A/C REFRIGERANT PRESSURE SENSOR ACCELERATOR PEDAL POSITION (APP) SENSOR (UNDER LEFT SIDE OF DASH) BLK WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CUTAWAY DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE GRY/WHT WIRE HI SPD GMLAN SER DATA - IGN VOLT IND INSTRUMENT PANEL CLUSTER (IPC) LOGIC IND CTRL LOW ENGINE OIL PRESSURE IND LT BLU WIRE LT GRN WIRE MALFUNCTION INDICATOR LAMP MIL SER CTRL DATA NITROGEN OXIDES SENSOR 1 (TOP LEFT REAR SIDE OF ENGINE) NITROGEN OXIDES SENSOR 2 (MIDDLE OF DIESEL PARTICULATE FILTER) ORG/BLK WIRE ORG/WHT WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL 28 29 PPL PNK WIRE PPL/WHT WIRE RED/WHT WIRE REDUCTANT LINE HEATER REDUCTANT SENSOR MODULE (ABOVE REDUCTANT TANK) REDUCTANT TANK HEATER SENS 1 GND SENS 1 SPLY VOLT SENS 2 GND TAN WIRE TAN/BLK WIRE WAIT TO WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

AUXILIARY BATTERY BATTERY BLK WIRE BLK/WHT WIRE BRN WIRE CHARGE AIR COOLER INLET TEMPERATURE SENSOR (ON INTAKE MANIFOLD) CHARGE AIR COOLER OUTLET TEMPERATURE SENSOR (NEAR COOLANT SURGE TANK) COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FUSIBLE LINK 1 FUSIBLE LINK 4 GRY WIRE GRY/WHT WIRE HI SPD GMLAN SER DATA - HTR CTRL IAH COMM 1 IAH COMM 2 IAH CURRENT SIG IAH DIG SIG IAH FDBK SIG IAH HEART BEAT SIG IAH SW ON/OFF SIG IAH TEMP FEEDBACK SIG IAH TEMP SIG IAH VOLT FEEDBACK SIG IAH VOLT SIG IGN 1 VOLT INTAKE AIR HEATER (BETWEEN INTAKE MANIFOLD TUBE, AIR COOLER OUTLET DUCT) LINE HTR CTRL LOWER RIGHT FRONT OF ENGINE) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MANIFOLD ABSOLUTE PRESSUE (MAP) SENSOR (ATTACHED TO INTAKE MANIFOLD TUBE) ORG/BLK WIRE ORG/WHT WIRE PLUG 1 CTRL PLUG 2 CTRL PLUG 3 CTRL PLUG 4 CTRL PLUG 5 CTRL PLUG 6 CTRL PLUG 7 CTRL PLUG 8 CTRL PNK WIRE PNK/BLK WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM PPL PPL/WHT WIRE PUMP HTR CTRL RED WIRE RED/WHT WIRE SECONDARY BATTERY SENS 1 GND SENS 1 SPLY VOLT SENS 2 GND SENS 2 SPLY VOLT TAN WIRE TAN/BLK WIRE UNDERHOOD JUNCTION BLOCK WAKEUP SER DATA WHT WIRE YEL WIRE

5 VOLT REF ACT CTRL CLOSE ACT CTRL OPEN BLK/WHT WIRE BRK APLY SENS SIG BRN WIRE BRN/GRY WIRE BRN/WHT WIRE CAC TEMP SENS SIG CKP SENS SIG CMP SENS SIG CTRL CYL 2 CTRL CYL 3 CTRL CYL 5 CTRL CYL 8 DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/WHT WIRE ECT SENS SIG EGR VALVE SENS SIG EGRT SENS 1 SPLY VOLT EGRT SENS 2 SPLY VOLT EGRV MTR HIGH SIG EGRV MTR LOW SIG EGT SENS 1 SIG ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXHAUST TEMPERATURE SENSOR 1 FUEL TEMP 1 SIG FUEL TEMP SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE INTAKE AIR VALVE LOW REF LOWER RIGHT FRONT OF ENGINE) LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE OIL PRESSURE SENS SIG ORG/BLK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POS SENS SIG POS SENS SIG 1 PPL/WHT WIRE PRESSURE SENS RTN PRESSURE SENS SIG PRESSURE SW SIG RED/WHT WIRE SENS SPLY VOLT TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TEMP 1 RTN TEMP SENS RTN TEMP SENS SIG WATER IN FUEL SENS SIG WATER IN-FUEL SENSOR WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE BRK SW FUSE 13 BRN WIRE BRN/WHT WIRE CRANKSHAFT POSITION (CKP) SENSOR (NEXT TO CRANKSHAFT PULLEY) DIESEL FUEL PUMP FUSE 24 DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BATT FUSE 19 ECM IGN/GLOW PLUG MDL IGN FUSE 30 ECM PWR/ TRN FUSE 45 EXHAUST GAS RECIRCULATION (EGR) TEMPERATURE SENSOR 2 EXHAUST GAS RECIRCULATION (EGR) VALVE (RIGHT SIDE OF ENGINE ABOVE 1 CYLINDER) FUEL FILTER PRESSURE SWITCH (TOP LEFT REAR SIDE OF ENGINE) FUEL HTR FUSE 71 FUEL INJECTOR 2 (ON LEFT SIDE OF ENGINE) FUEL INJECTOR 3 (ON RIGHT SIDE OF ENGINE) FUEL INJECTOR 5 (ON RIGHT SIDE OF ENGINE) FUEL INJECTOR 8 (ON LEFT SIDE OF ENGINE) FUEL PUMP RELAY GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY 15 ENERGIZED LOWER RIGHT FRONT OF ENGINE) LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAF/ CNSTR FUSE 64 NCA WIRE ORG/BLK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL/WHT WIRE PWR/ TRN RELAY 49 RED/WHT WIRE TAN WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT/BLK WIRE YEL WIRE

5 VOLT REF ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DFI VOLT CTRL CYL 4 DFI VOLT CTRL CYL 6 DFI VOLT CTRL CYL 7 DFI VOLT CTRL CYL 8 DK BLU WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE OIL PRESSURE (EOP) SENSOR (LOWER LEFT SIDE OF ENGINE) FUEL INJECTOR 1 (ON RIGHT SIDE OF ENGINE) FUEL INJECTOR 6 (ON LEFT SIDE OF ENGINE) GND SOL HIGH SIG GRY WIRE LOW REF LOWER RIGHT FRONT OF ENGINE) LT BLU WIRE LT BLU/WHT WIRE NCA WIRE ORG/BLK WIRE PNK WIRE PPL PPL/ WHT WIRE PPL/WHT WIRE SENS VOLT REF 5 VOLT REF TAN WIRE TAN/WHT WIRE TURBOCHARGER VANE POSITION SENSOR (ON TOP OF TURBOCHARGER) VEHICLE SPD SIG WHT WIRE WHT/ BLK WIRE YEL WIRE YEL/BLK WIRE