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

BLK WIRE CRANK FUSE 27 CRANK VOLT DK GRN WIRE ENG 1 FUSE 23 FUSIBLE LINK 2 GENERATOR HOT AT ALL TIMES IGN A FUSE 49 IGN B FUSE 52 IGNITION SWITCH LEFT BATTERY LOCK PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE OF TRANSMISSION) PNK WIRE POWER DISTRIBUTION SYSTEM POWERTRAIN CONTROL MODULE (PCM) (IN ENG COMPT, ON LEFT INNER FENDER) PPL RED WIRE RED/BLK WIRE RUN WIRE STARTER ENABLE RELAY CTRL STARTER MOTOR STARTER RELAY 61 UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENG COMPT) YEL WIRE YEL/BLK WIRE

BLK WIRE CRANK FUSE 27 CRANK VOLT DK GRN WIRE ENG 1 FUSE 23 FUSIBLE LINK 2 GENERATOR HOT AT ALL TIMES IGN A FUSE 49 IGN B FUSE 52 IGNITION SWITCH LEFT BATTERY LOCK PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE OF TRANSMISSION) PNK WIRE POWER DISTRIBUTION SYSTEM POWERTRAIN CONTROL MODULE (PCM) (IN ENG COMPT, ON LEFT INNER FENDER) PPL RED WIRE RED/BLK WIRE RUN WIRE STARTER ENABLE RELAY CTRL STARTER MOTOR STARTER RELAY 61 UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENG COMPT) YEL WIRE YEL/BLK WIRE

4.3L AUTOMATIC TRANSMISSION BODY CONTROL MODULE (BCM) BRN WIRE CENTRAL SEQUENTIAL FUEL INJECTION (CENTRAL SFI) FUEL INJECTOR 3 CRANK FUSE 27 ENG 1 FUSE 23 ENG 2 FUSE 21 EVAPORATIVE EMISSIONS (EVAP) CANISTER PURGE SOLENOID EXCEPT 4.3L EXCEPT 4.3L 4.3L EXCEPT 4.3L 4.3L 4.3L FR WPR FUSE 47 FROM ENG 1 FUSE 23 (DIAGRAM 4 OF 6) FROM IGNITION SWITCH (DIAGRAM 3 OF 6) FROM UNDERHOOD FUSE BLOCK (AIR BAG FUSE 37) (DIAGRAM 3 OF 6) FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL INJECTOR 4 FUEL INJECTOR 5 FUEL INJECTOR 7 FUEL INJECTOR 6 CENTRAL SEQUENTIAL FUEL INJECTION (CENTRAL SFI) FUEL INJECTOR 8 IGN 0 FUSE 6 IGN E FUSE 22 IGNITION COIL IGNITION COIL 1 IGNITION COIL 3 IGNITION COIL 2 IGNITION COIL 7 IGNITION COIL 5 IGNITION COIL 8 IGNITION COIL 4 IGNITION COIL 6 IGNITION COIL MODULE INSTRUMENT PANEL CLUSTER MASS AIR FLOW (MAF SENSOR) NCA WIRE NOT USED NOT USED PARK/ NEUTRAL POSITION (PNP) SWITCH PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL STOP LAMP SWITCH CRUISE CONTROL ON/OFF SWITCH TBC ACCY FUSE 46 TO IGN E FUSE 22 (DIAGRAM 4 OF 6) TURN SIGNAL SWITCH TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) A/C RELAY 54 WHT WIRE WINDSHIELD WIPER MOTOR YEL WIRE

A/C FUSE 32 A/C RELAY 54 AUXILIARY 2 FUSE 33 REAR DOOR LKS FUSE 5 AUXILIARY RELAY 24 CARGO UNLK RELAY 27 COMPOSITE+ DK GRN/WHT WIRE DOOR LKS FUSE 15 DOOR LKS RELAY 30 DRV LKS FUSE 7 DRV UNLK RELAY 28 E.C.M. FUSE 33 ECM ACT FUSE 63 ECM RELAY 62 ENGINE CONTROL MODULE (ECM) FROM UNDERHOOD FUSE BLOCK (HDLP HI BEAM 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 57 HDLP HI BEAM RELAY 56 HDLP LO BEAM RELAY 58 HORN FUSE 15 HORN RELAY 59 HTD MIR/DEFOG FUSE 12 IGN A FUSE 49 IGN B FUSE 52 LEFT HEADLAMP LEFT HI BEAM FUSE 44 LEFT HIGH BEAM HEADLAMP LEFT LO BEAM FUSE 43 LEFT LOW BEAM HEADLAMP LT GRN/BLK WIRE PASS UNLK RELAY 31 REAR FOG LAMPS FUSE 34 REAR FOG LAMPS RELAY 55 RED/BLK WIRE RED/WHT WIRE RIGHT HEADLAMP RIGHT HI BEAM FUSE 45 RIGHT HIGH BEAM HEADLAMP RIGHT LO BEAM FUSE 42 RIGHT LOW BEAM HEADLAMP RR DEFOG RELAY 25 SEALED STARTER RELAY 61 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) WSW FUSE 41 WSW RELAY 53 YEL WIRE

AIRBAG FUSE 37 BRN WIRE BTSI/BU FUSE 36 CTSY LP RELAY 26 (RV/UPFITTER) CTSY LP/SEO FUSE 3 DK GRN WIRE ECM/TCM/ GLOW PLUG FUSE 38 ENGINE CONTROL MODULE (ECM) FR PRK FUSE 22 FROM UNDERHOOD FUSE BLOCK (IGN A FUSE 49) (DIAGRAM 2 OF 6) FROM UNDERHOOD FUSE BLOCK (IGN B, FUSE 52) (DIAGRAM 2 OF 6) FUEL HEATER FUEL HTR FUSE 25 GLOW PLUG CONTROL MODULE (GPCM) HEAVY DUTY IGNITION SWITCH INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH (HEAVY DUTY) INFLATABLE RESTRAINT PASSENGER AIRBAG OFF/ON INDICATOR INFLATABLE RESTRAINT PASSENGER PRESENCE SYSTEM (PPS) MODULE (LIGHT DUTY) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSIDE REARVIEW MIRROR (W/ TEMP DISPLAY) BODY CONTROL MODULE (BCM) ISRVM FUSE 26 LEFT FRONT MARKER LAMP LEFT FRONT PARK/TURN SIGNAL LAMP LEFT TAIL/STOP, TURN SIGNAL LAMP RIGHT TAIL/STOP, TURN SIGNAL LAMP LICENSE LAMP LIGHT DUTY LOCK LT GRN WIRE LT GRN/BLK WIRE NOT USED NOT USED ORG/ WIRE PARK PARK LP RELAY 29 PARK/ NEUTRAL POSITION (PNP) SWITCH PNK WIRE RED/BLK WIRE REVERSE RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/TURN SIGNAL LAMP RR PRK FUSE 20 LR PRK FUSE 18 RUN WIRE SPARE FUSE 35 SPARE FUSE 39 SPARE FUSE 40 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH TBC IGN 1 FUSE 24 TO BODY FUSE BLOCK (AUXILIARY 1 FUSE 32) (DIAGRAM 5 OF 6) TO BODY FUSE BLOCK (BRK FUSE 11) (DIAGRAM 5 OF 6) TO UNDERHOOD FUSE BLOCK (CRANK FUSE 27) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (IGN O FUSE 6) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (SPARE FUSE 21) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (TBC ACC FUSE 46) (DIAGRAM 4 OF 6) TRAILER WIRING CUTAWAY TRANSMISSION CONTROL MODULE (TCM) TRLR BU FUSE 5 BTSI FUSE 28 TRLR PRK FUSE 21 UPFTR PRK FUSE 16 UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE

A/C RELAY AUTOMATIC TRANSMISSION BODY CONTROL MODULE (BCM) BRN WIRE CRANK FUSE 27 ENG 1 FUSE 23 ENGINE CONTROL MODULE (ECM) FR WPR FUSE 47 FROM ENG 1 FUSE 23 (DIAGRAM 4 OF 6) FROM IGNITION SWITCH (DIAGRAM 3 OF 6) FROM UNDERHOOD FUSE BLOCK (AIR BAG FUSE 37) (DIAGRAM 3 OF 6) GLOW PLUG CONTROL MODULE (GPCM) IGN 0 FUSE 6 IGN E FUSE 22 INSTRUMENT PANEL CLUSTER MASS AIR FLOW (MAF SENSOR) NCA WIRE NOT USED NOT USED PARK/ NEUTRAL POSITION (PNP) SWITCH PNK PNK WIRE PNK WIRE PPL SPARE FUSE 21 STOP LAMP SWITCH CRUISE CONTROL ON/OFF SWITCH TBC/TCM ACCY FUSE 46 TO IGN E FUSE 22 (DIAGRAM 4 OF 6) TURN SIGNAL SWITCH TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WINDSHIELD WIPER MOTOR TRANSMISSION CONTROL MODULE (TCM) YEL WIRE

A/C FUSE 32 A/C RELAY 54 AUXILIARY 2 FUSE 33 REAR DOOR LKS FUSE 5 AUXILIARY RELAY 24 CARGO UNLK RELAY 27 COMPOSITE+ DK GRN/WHT WIRE DOOR LKS FUSE 15 DOOR LKS RELAY 30 DRV LKS FUSE 7 DRV UNLK RELAY 28 E.C.M. FUSE 33 ECM ACT FUSE 63 ECM RELAY 62 ENGINE CONTROL MODULE (ECM) FROM UNDERHOOD FUSE BLOCK (HDLP HI BEAM 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 57 HDLP HI BEAM RELAY 56 HDLP LO BEAM RELAY 58 HORN FUSE 15 HORN RELAY 59 HTD MIR/DEFOG FUSE 12 IGN A FUSE 49 IGN B FUSE 52 LEFT HEADLAMP LEFT HI BEAM FUSE 44 LEFT HIGH BEAM HEADLAMP LEFT LO BEAM FUSE 43 LEFT LOW BEAM HEADLAMP LT GRN/BLK WIRE PASS UNLK RELAY 31 REAR FOG LAMPS FUSE 34 REAR FOG LAMPS RELAY 55 RED/BLK WIRE RED/WHT WIRE RIGHT HEADLAMP RIGHT HI BEAM FUSE 45 RIGHT HIGH BEAM HEADLAMP RIGHT LO BEAM FUSE 42 RIGHT LOW BEAM HEADLAMP RR DEFOG RELAY 25 SEALED STARTER RELAY 61 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) WSW FUSE 41 WSW RELAY 53 YEL WIRE

AIRBAG FUSE 37 BRN WIRE BTSI/BU FUSE 36 CTSY LP RELAY 26 (RV/UPFITTER) CTSY LP/SEO FUSE 3 DK GRN WIRE ECM/TCM/ GLOW PLUG FUSE 38 ENGINE CONTROL MODULE (ECM) FR PRK FUSE 22 FROM UNDERHOOD FUSE BLOCK (IGN A FUSE 49) (DIAGRAM 2 OF 6) FROM UNDERHOOD FUSE BLOCK (IGN B, FUSE 52) (DIAGRAM 2 OF 6) FUEL HEATER FUEL HTR FUSE 25 GLOW PLUG CONTROL MODULE (GPCM) HEAVY DUTY IGNITION SWITCH INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH (HEAVY DUTY) INFLATABLE RESTRAINT PASSENGER AIRBAG OFF/ON INDICATOR INFLATABLE RESTRAINT PASSENGER PRESENCE SYSTEM (PPS) MODULE (LIGHT DUTY) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSIDE REARVIEW MIRROR (W/ TEMP DISPLAY) BODY CONTROL MODULE (BCM) ISRVM FUSE 26 LEFT FRONT MARKER LAMP LEFT FRONT PARK/TURN SIGNAL LAMP LEFT TAIL/STOP, TURN SIGNAL LAMP RIGHT TAIL/STOP, TURN SIGNAL LAMP LICENSE LAMP LIGHT DUTY LOCK LT GRN WIRE LT GRN/BLK WIRE NOT USED NOT USED ORG/ WIRE PARK PARK LP RELAY 29 PARK/ NEUTRAL POSITION (PNP) SWITCH PNK WIRE RED/BLK WIRE REVERSE RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/TURN SIGNAL LAMP RR PRK FUSE 20 LR PRK FUSE 18 RUN WIRE SPARE FUSE 35 SPARE FUSE 39 SPARE FUSE 40 STEERING WHEEL SPEED/ POSITION SENSOR STOP LAMP SWITCH TBC IGN 1 FUSE 24 TO BODY FUSE BLOCK (AUXILIARY 1 FUSE 32) (DIAGRAM 5 OF 6) TO BODY FUSE BLOCK (BRK FUSE 11) (DIAGRAM 5 OF 6) TO UNDERHOOD FUSE BLOCK (CRANK FUSE 27) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (IGN O FUSE 6) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (SPARE FUSE 21) (DIAGRAM 4 OF 6) TO UNDERHOOD FUSE BLOCK (TBC ACC FUSE 46) (DIAGRAM 4 OF 6) TRAILER WIRING CUTAWAY TRANSMISSION CONTROL MODULE (TCM) TRLR BU FUSE 5 BTSI FUSE 28 TRLR PRK FUSE 21 UPFTR PRK FUSE 16 UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE

A/C RELAY AUTOMATIC TRANSMISSION BODY CONTROL MODULE (BCM) BRN WIRE CRANK FUSE 27 ENG 1 FUSE 23 ENGINE CONTROL MODULE (ECM) FR WPR FUSE 47 FROM ENG 1 FUSE 23 (DIAGRAM 4 OF 6) FROM IGNITION SWITCH (DIAGRAM 3 OF 6) FROM UNDERHOOD FUSE BLOCK (AIR BAG FUSE 37) (DIAGRAM 3 OF 6) GLOW PLUG CONTROL MODULE (GPCM) IGN 0 FUSE 6 IGN E FUSE 22 INSTRUMENT PANEL CLUSTER MASS AIR FLOW (MAF SENSOR) NCA WIRE NOT USED NOT USED PARK/ NEUTRAL POSITION (PNP) SWITCH PNK PNK WIRE PNK WIRE PPL SPARE FUSE 21 STOP LAMP SWITCH CRUISE CONTROL ON/OFF SWITCH TBC/TCM ACCY FUSE 46 TO IGN E FUSE 22 (DIAGRAM 4 OF 6) TURN SIGNAL SWITCH TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WINDSHIELD WIPER MOTOR TRANSMISSION CONTROL MODULE (TCM) YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LH AUDIO SIG (+) RH AUDIO SIG (+) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 B+ LF MID OUT (+) RF MID OUT (+) 1959 1955 LR MID OUT (-) RR MID OUT (-) 2 1 8 LO REF 658 1782 VOICE SIG DRAIN WIRE HI SPD GMLAN ANTENNA IN BATT POSITIVE VOLT BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BREAKOUT) BRN/WHT WIRE CELLULAR, DIGITAL RADIO ANTENNA CELLULAR/ NAVIGATION ANTENNA COAX COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CUTAWAY UPFITTER DIGITAL RADIO RECEIVER (LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRAIN WIRE GRY WIRE HOT AT ALL TIMES INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (AT TOP OF STEERING COLUMN) INFO LED DIMMING CTRL GND LF MID OUT (-) RF MID OUT (-) LEFT CARGO DOOR SPEAKER (IF EQUIPPED) LEFT FRONT SPEAKER LEFT REAR SPEAKER LH AUDIO SIG + RH AUDIO SIG + LO GMLAN SERIAL DATA LO REF LO SERIAL DATA LR MID OUT (+) RR MID OUT (+) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE MUTE NCA WIRE ORG/ WIRE PASSENGER/ CARGO PNK WIRE RADIO RADIO ANTENNA RDO/ CHIME FUSE 20 RED/WHT WIRE RIGHT CARGO DOOR SPEAKER (IF EQUIPPED) RIGHT FRONT SPEAKER RIGHT REAR SPEAKER RIGHT STEERING WHEEL CONTROL SWITCH SEEK DOWN SEEK UP SOURCE STEERING WHEEL CTRL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE USB CABLE USB CHARGE USB RECEPTACLE VEHICLE COMMUNICATION INTERFACE MODULE (VICM) (BELOW STEERING COLUMN) VOICE SIG VOL DOWN VOL UP W/ VEHICLE COMMUNICATION SYSTEM W/O VEHICLE COMMUNICATION SYSTEM WHT WIRE YEL WIRE