Chevrolet Chevy Express G3500 (1996-2012) yel Wiring diagrams

BLK WIRE BLU WIRE BODY CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP STOP LAMP SUPPLY VOLTAGE CRUISE CONTROL SYSTEM DIESEL DK BLU WIRE DK BLU/WHT WIRE DK DK DK GRN WIRE DK GRN/WHT WIRE DRIVER'S OUTSIDE REAR VIEW MIRROR DRL ON/OFF SIG DRV PWR TRN MIR FUSE 14 FRONT TURN SIGNAL LAMP SUPPLY VOLTAGE FRT PRK FUSE 22 GRN WIRE H.D. W/ GAS EARLY PRODUCTION HAZARD SWITCH HEAD OFF HEADLAMP AND PANEL DIMMER SWITCH HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER LEFT LEFT TURN SIGNAL IND LOGIC LEFT TURN SIGNAL LAMP LR PKR FUSE 18 LT BLU WIRE LT BLU/WHT WIRE LT GRN/BLK WIRE NCA WIRE NOT USED PARK PARK LAMP RELAY 29 PARK LAMP RLY CTRL HAZARD SW SIG DRL LOW CONTROL PARK LAMP SW ON SIG PASS TRN MIR FUSE 19 PASSENGER'S OUTSIDE REAR VIEW MIRROR PNK WIRE PROVISIONAL RED/WHT WIRE RIGHT RIGHT TURN SIGNAL IND RIGHT TURN SIGNAL LAMP RR PKR FUSE 20 SPLICE PACK STOP/ CHMSL FUSE 8 SUPPLEMENTAL RESTRAINTS SYSTEM TRAILER WIRING (BLUNT CUT) TRLR PRK FUSE 21 TURN SIGNAL SWITCH TURN SIGNAL/ MULTIFUNCTION SWITCH TURN SIGNAL/HAZARD FLASHER MODULE (BEHIND LEFT CENTER OF DASH) UPFTR PRK LAMPS FUSE 16 W/ OUTSIDE REAR VIEW MIRROR TURN SIGNAL INDICATORS WHT WIRE YEL WIRE YEL/BLK WIRE

330 OHMS BATTERY POSITIVE VOLTAGE BLK WIRE BLU WIRE BRN WIRE BTSI BCK/UP FUSE 36 DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FUSE BLOCK- UNDERHOOD (LEFT SIDE OF ENGINE COMPARTMENT) FUSE BLOCK- UNDERHOOD (LEFT SIDE OF ENGINE COMPARTMENT) RT DRL/ TURN FUSE 9 GRN WIRE GROUND HAZRD FUSE 14 HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LT BLU WIRE LT DRL/ TURN FUSE 10 LT REAR STOP/ TRN FUSE 4 MARKER LAMP (LF) MARKER LAMP (RF) NOT USED PARK/ TURN SIGNAL LAMP (LF) PARK/ TURN SIGNAL LAMP-RF PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE OF TRANSMISSION) PNK WIRE RED WIRE RED/WHT WIRE RESISTOR RT REAR STOP/ TRN FUSE 6 STOP LAMP FUSE 7 STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TRAILER AUXILIARY SUPPLY VOLTAGE TRAILER BACKUP LAMPS SUPPLY VOLTAGE TRAILER WIRING (BLUNT CUT) TRLR BCK/UP FUSE 5 TRLR FUSE 13 TRLR FUSE 50 WHT WIRE YEL WIRE YEL/BLK WIRE

ASSEMBLY BREAKOUT) BACKUP LIGHTS CIRCUIT BLK WIRE BLU WIRE BODY CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP CHMSL/ STOP LAMP SUPPLY VOLTAGE CRUISE CONTROL SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER'S OUTSIDE REAR VIEW MIRROR DRV PWR TRN MIR FUSE 14 FRONT TURN SIGNAL LAMP SUPPLY VOLTAGE FRT PRK FUSE 22 FUSE BLOCK- BODY (UNDER LEFT FRONT SEAT) FUSE BLOCK- BODY (UNDER LEFT FRONT SEAT) STOP/ CHMSL FUSE 8 GRN WIRE H.D. W/ GAS EARLY PRODUCTION HAZARD SWITCH HEAD HEADLAMP AND PANEL DIMMER SWITCH HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER LEFT LEFT TURN SIGNAL IND LOGIC LEFT TURN SIGNAL LAMP LICENSE LAMP LT BLU WIRE LT BLU/WHT WIRE LT GRN/BLK WIRE LT REAR PARK FUSE 18 LT REAR STOP/ TURN FUSE 3 NCA WIRE NOT USED OFF PARK PARK LAMP RELAY 29 PARK LAMP RLY CTRL HAZARD SW SIG DRL LOW CONTROL PARK LAMP SW ON SIG PASS TRN MIR FUSE 19 PASSENGER'S OUTSIDE REAR VIEW MIRROR PNK 8 9 WIRE PNK WIRE PROVISIONAL RED/WHT WIRE RIGHT RIGHT TURN SIGNAL IND RIGHT TURN SIGNAL LAMP RT REAR PARK FUSE 20 RT REAR STOP/ TURN FUSE 6 SPLICE PACK SUPPLEMENTAL RESTRAINTS SYSTEM TAIL/STOP, TURN SIGNAL LAMP (LEFT) TAIL/STOP, TURN SIGNAL LAMP (RIGHT) TRAILER WIRING (BLUNT CUT) TRLR PRK FUSE 21 TURN SIGNAL SWITCH TURN SIGNAL/ MULTIFUNCTION SWITCH TURN SIGNAL/HAZARD FLASHER MODULE (BEHIND LEFT CENTER OF DASH) UPFTR PRK LAMPS FUSE 16 W/ OUTSIDE REAR VIEW MIRROR TURN SIGNAL INDICATORS WHT WIRE YEL WIRE YEL/BLK WIRE

BATTERY POSITIVE VOLTAGE BLK WIRE BLU WIRE BRN WIRE BTSI BCK/UP FUSE 36 DK BLU WIRE DK DK LT DK GRN WIRE FUSE BLOCK- UNDERHOOD (ON LEFT SIDE OF ENGINE COMPARTMENT) FUSE BLOCK- UNDERHOOD (ON LEFT SIDE OF ENGINE COMPARTMENT) RT DRL/ TURN FUSE 9 GRN WIRE GROUND HAZRD FUSE 14 HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LT BLU WIRE LT DRL/ TURN FUSE 10 LT REAR STOP/ TRN FUSE 3 TRLR STOP/ TRN FUSE 17 LT GRN WIRE MARKER LAMP (LF) MARKER LAMP (RF) ORG/ WIRE PARK/ TURN SIGNAL LAMP (LF) PARK/ TURN SIGNAL LAMP-RF PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE OF TRANSMISSION) PNK 8 9 WIRE PNK WIRE RED WIRE RED/WHT WIRE RT REAR STOP/ TRN FUSE 4 STOP LAMP FUSE 7 STOP LAMP SWITCH (ABOVE BRAKE PEDAL) TRAILER AUXILIARY SUPPLY VOLTAGE TRAILER BACKUP LAMPS SUPPLY VOLTAGE TRAILER PARK LAMPS SUPPLY VOLTAGE TRAILER STOP/ TURN RELAY- LEFT TRAILER STOP/ TURN RELAY- RIGHT TRAILER WIRING (BLUNT CUT) TRLR BCK/UP FUSE 5 TRLR FUSE 13 TRLR FUSE 50 WHT WIRE YEL WIRE

12 8 17 11 SWITCH ON SIG PARK LAMPS SIG SWITCH OFF SIG AMBIENT SENS SIG 25 18 HEADLAMP SW SIG HEADLAMP LO SIG AMBIENT LIGHT SENSOR (ON TOP OF INSTRUMENT PANEL) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE DRL 1 FUSE 67 DRL 2 FUSE 66 DRL PCB RELAY FTP FUSIBLE LINK 2 HEAD HEAD 1 8 HEADLAMP, PANEL DIMMER SWITCH HIGH BEAM IND HIGH BEAM PCB RELAY HOT AT ALL TIMES HOT W/ RUN/CRNK RELAY 15 ENERGIZED IGN IPC FUSE 10 LEFT HIGH BEAM HEADLAMP LEFT HEADLAMP LEFT LOW BEAM HEADLAMP LO BEAM RLY CTRL LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOW BEAM PCB RELAY LT BLU WIRE LT GRN/BLK WIRE LT LO BEAM FUSE 53 OFF AUTO PARK PARK BRAKE SWITCH (UNDER LEFT SIDE OF DASH) PARK BRK SW SIG PNK WIRE PNK/WHT WIRE PPL PPL 23 16 LO BEAM CTRL HI BEAM RLY CTRL RED WIRE RIGHT HEADLAMP RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP RT HI BEAM FUSE 52 RT LO LT HI BEAM BEAM FUSE 54 FUSE 51 SERIAL DATA SYSTEM TAN/WHT WIRE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ CHROME GRILLE W/ CHROME W/O CHROME GRILLE GRILLE W/O CHROME GRILLE WHT WIRE YEL WIRE

23 3 SERIAL DATA BELT SW 7 63 5 VOLT REF LOW REF ABS IND. AIR BAG IND BATTERY IND BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER RIGHT SIDE OF DASH) BRAKE IND BRAKE WARNING IND CONTROL BATT VOLTAGE GROUND GROUND IGN VOLTAGE SERIAL DATA BRN WIRE BRN/WHT WIRE CHECK GAGES IND. CLASS 2 (BCM) CLASS 2 (EBCM) CLASS 2 (PCM) CLASS 2 (SDM) COMPUTER DATA LINES SYSTEM CRUISE IND DIMMING DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRL IND ECT SENS ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMP ENGINE COOLANT TEMPERATURE SENSOR (LEFT SIDE OF ENGINE) ENGINE OIL LEVEL SWITCH (4.8L, 5.3L, 6.0L) (RIGHT SIDE OF OIL PAN) ENGINE OIL PRESSURE SENSOR (TOP REAR OF ENGINE) FUEL GAUGE FUEL PUMP/ SENDER ASSEMBLY (IN FUEL TANK) GROUND GRY WIRE HIGH BEAM IND HOT AT ALL TIMES HOT IN RUN OR START IGN IGN CLASS 2 (PCM) IGN CLASS 2 (PCM) IGN CLASS 2 (PCM) IGN CLASS 2 (PCM) IGN VOLT SIG IGN E FUSE 22 ILLUMINATION (6 BULBS) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER IPC FUSE 31 LCD DISPLAY 000000 TRIP LEFT FRONT SEAT BELT SWITCH (IN LEFT FRONT SEAT BELT LATCH) LEFT TURN IND LH FRT TURN SIG SUP VOLT LOW REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION IND LAMP MIL CTRL MIL SIGNAL OFF OIL PRESS OIL PRESS (RIGHT REAR OF ENGINE) OIL PRESSURE OIL PRESSURE IND P R N D 3 2 1 PARK BRAKE PARK BRAKE SWITCH (UNDER LEFT SIDE OF DASH) PNK WIRE POWER BRAKE BOOSTER FLUID PRESSURE ALARM SWITCH (IN BOOSTER INLET HOSE) POWERTRAIN CONTROL MODULE (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL FUEL LEVEL RED/WHT WIRE RH FRT TURN SIG SUP VOLT RIGHT TURN IND SEAT BELT IND SECURITY IND SERIAL DATA SPEEDOMETER SPLICE PACK TAN WIRE TAN/WHT WIRE TOW/HAUL IND TRACTION CONTROL IND'S TRIP RESET SWITCH TRIP RESET SWN SIGNAL GROUND UNDERHOOD FUSE BLOCK (IN ENGINE COMPT, ATTACHED TO LEFT FRONT FENDER) VOLTMETER W/ PWR SEAT W/O PWR SEAT YEL WIRE

11 12 IPL DIMMER SW SIG IP DIMMING VOLT REF 2 15 HEAD 8 17 PARK LAMPS SIG HEADLAMPS OFF SIG AUXILIARY BLOWER MOTOR SWITCH BCM 1 FUSE 59 BCM 2 FUSE 58 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CONNECTOR) PNK WIRE CONTROL DK GRN WIRE DRIVER DOOR LOCK SWITCH DRIVER INFORMATION CENTER (DIC) SWITCH DRIVER WINDOW SWITCH FRONT AUXILIARY HVAC CONTROL ASSEMBLY HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) HVAC CONTROL ASSEMBLY IN FRONT HEADLINER HARNESS, 21 CM INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH (W/ MANUAL SUPPRESSION) IPL DIMMING CTRL LEFT STEERING WHEEL CONTROL SWITCH LT BLU WIRE OFF AUTO PARK ORG/WHT WIRE PASSENGER DOOR LOCK SWITCH PASSENGER WINDOW SWITCH PNK CONTROL PNK WIRE PNK PNK W/O REDUNDANT RADIO STEERING WHEEL WIRE PNK WIRE RADIO REAR AUXILIARY HVAC CONTROL ASSEMBLY SPLICE BLOCK RED WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROL SWITCH SPLICE BLOCK STR/WHL/ SNSR TAN WIRE TAN/BLK WIRE TOW/HAUL SWITCH TRACTION CONTROL SWITCH (TCS) (W/ ACTIVE BRAKE CONTROL) W/ AUTOMATIC ELECTRONIC CRUISE CONTROL W/ AUXILIARY HEATER W/O REAR A/C W/ ELECTRIC SIDE DOOR LOCK W/ POWER OPERATED WINDOW (W/ POWER MIRRORS, POWER WINDOWS) W/ REAR W/O REAR AUXILIARY AUXILIARY CONTROLS CONTROLS W/ REDUNDANT RADIO STEERING WHEEL W/ RV UPFITTER W/O RADIO PROVISIONS W/O RV UPFITTER WHT WIRE YEL WIRE

A/C FUSE 32 A/C RELAY AUXILIARY 2 FUSE 33 CARGO LKS FUSE 5 AUXILIARY RELAY CAN VENT FUSE 34 CARGO UNLK RELAY COMPOSITE+ DK GRN/WHT WIRE DOOR LKS FUSE 15 DOOR LKS RELAY DRV LKS FUSE 7 HTD MIR/DEFOG FUSE 12 DRV UNLK RELAY EVAPORATIVE EMISSIONS (EVAP) CANISTER VENT SOLENOID FROM UNDERHOOD FUSE BLOCK (HDLP HIBM RELAY) (DIAGRAM 2 OF 6) FROM UNDERHOOD FUSE BLOCK (MEGA FUSE 65) (DIAGRAM 1 OF 6) FROM UNDERHOOD FUSE BLOCK (PWR SEAT CIRCUIT BREAKER 60) (DIAGRAM 1 OF 6) FUEL PUMP FUSE 12 FUEL PUMP RELAY HDLP HIBM RELAY HDLP LOBM RELAY HORN FUSE 15 HORN RELAY IGN A FUSE 49 IGN B FUSE 52 LEFT HEADLAMP LEFT HIBM FUSE 44 LEFT HIGH BEAM HEADLAMP LEFT LOBM FUSE 43 LEFT LOW BEAM HEADLAMP LT GRN/BLK WIRE PASS UNLK RELAY RED/BLK WIRE RED/WHT WIRE RIGHT HEADLAMP RIGHT HIBM FUSE 45 RIGHT HIGH BEAM HEADLAMP RIGHT LOBM FUSE 42 RIGHT LOW BEAM HEADLAMP RR DEFOG RELAY SEALED SPARE FUSE 33 SPARE RELAY 55 SPARE RELAY 62 STARTER RELAY TAN/WHT WIRE TO BODY FUSE BLOCK (PARK LP RELAY) (DIAGRAM 3 OF 6) TO IGNITION SWITCH (DIAGRAM 3 OF 6) TO UNDERHOOD FUSE BLOCK (IGN A FUSE 49) (DIAGRAM 2 OF 6) WPR FUSE 41 WPR RELAY YEL WIRE

BANK 1 SENSOR 1 BANK 1 SENSOR 2 BANK 2 SENSOR 1 BANK 2 SENSOR 2 BLUNT CUT) BRN WIRE BTSI/BU FUSE 36 SPARE FUSE 35 CRUISE CONTROL MODULE (IF EQUIPPED) CTSY LP RELAY (RV/UPFITTER) CTSY LP/SEO FUSE 3 CUTAWAY DK GRN WIRE FR PRK FUSE 22 FROM BODY FUSE BLOCK (AUXILIARY 2 FUSE 33) (DIAGRAM 2 OF 6) FROM UNDERHOOD FUSE BLOCK (IGN A FUSE 49) (DIAGRAM 2 OF 6) FROM UNDERHOOD FUSE BLOCK (IGN B, FUSE 52) (DIAGRAM 2 OF 6) FUSE 39 FUSE 40 HEATED OXYGEN SENSOR HEATED OXYGEN SENSOR IGNITION SWITCH INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH (HEAVY DUTY) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSIDE REARVIEW MIRROR (W/ TEMP DISPLAY) BODY CONTROL MODULE (BCM) ISRV FUSE 26 LEFT FRONT MARKER LAMP LEFT FRONT PARK/TURN SIGNAL LAMP LICENSE LAMP LOCK LOCK OFF LT GRN WIRE LT GRN/BLK WIRE NCA WIRE OFF ORG/ WIRE PARK PARK LP RELAY PARK/ NEUTRAL POSITION (PNP) SWITCH PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (PCM) RED/BLK WIRE REVERSE RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/TURN SIGNAL LAMP RIGHT TAIL/STOP, TURN SIGNAL LAMP LEFT TAIL/STOP, TURN SIGNAL LAMP RIGHT TAILLAMP ASSEMBLY LEFT TAILLAMP ASSEMBLY RR PRK FUSE 20 LR PRK FUSE 18 RUN WIRE SIR FUSE 37 SPARE FUSE 25 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH (BLUNT CUT) (NOT USED) TBC IGN 1 FUSE 24 THROTTLE CONTROL ACTUATOR MODULE TO BODY FUSE BLOCK (AUXILIARY 1 FUSE 32) (DIAGRAM 5 OF 6) TO BODY FUSE BLOCK (BRKS FUSE 11) (DIAGRAM 5 OF 6) TO UNDERHOOD FUSE BLOCK (CRANK FUSE 27) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (ENG 2 FUSE 21) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (IGN O FUSE 6) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (TBC ACC FUSE 46) (DIAGRAM 4 OF 6) TRAILER WIRING TRAILER WIRING CUTAWAY TRLR BU FUSE 5 BTSI FUSE 28 TRLR PRK FUSE 21 UPFTR PRK FUSE 16 UNDERHOOD FUSE BLOCK W/ ACTIVE HANDLING W/O ACTIVE HANDLING WHT WIRE YEL WIRE

4.3L A/C RELAY AUTOMATIC TRANSMISSION BODY CONTROL MODULE (BCM) BRN WIRE CRANK FUSE 27 CRUISE CONTROL ON/OFF SWITCH ENG 1 FUSE 23 ENG 2 FUSE 21 EVAPORATIVE EMISSIONS (EVAP) CANISTER PURGE SOLENOID EXCEPT 4.3L 4.3L FR WPR FUSE 47 FROM IGNITION SWITCH (DIAGRAM 3 OF 6) FROM UNDERHOOD FUSE BLOCK (SIR FUSE 37) (DIAGRAM 3 OF 6) FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL INJECTOR 3 FUEL INJECTOR 4 FUEL INJECTOR 6 FUEL INJECTOR 6 FUEL INJECTOR 7 (EXCEPT 4.3L) FUEL INJECTOR 8 (EXCEPT 4.3L) IGN 0 FUSE 6 IGN E FUSE 22 IGNITION COIL IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 IGNITION COIL 5 IGNITION COIL 7 IGNITION COIL 8 IGNITION COIL 4 IGNITION COIL 6 IGNITION COIL MODULE INSTRUMENT PANEL CLUSTER MASS AIR FLOW (MAF SENSOR) PARK/ NEUTRAL POSITION (PNP) SWITCH PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL STOP LAMP SWITCH TBC ACC FUSE 46 TURN SIGNAL SWITCH TURN SIGNAL/ MULTIFUNCTION SWITCH WHT WIRE WINDSHIELD WIPER MOTOR YEL WIRE