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

ACCY LOCK OFF AUXILIARY BATTERY BATTERY BATTERY JUNCTION BLOCK ORANGE LABEL STUD BLK WIRE BLUE LABEL STUD CRANK FUSE 8 DIESEL FUSIBLE LINK (14 GA- GAS GAS FUSIBLE LINK (8 GA-RUST: DIESEL) FUSIBLE LINK (10 GA- RUST) GASOLINE GENERATOR GRY WIRE HOLD-IN WINDING PULL-IN WINDING I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION SWITCH PARK/NEUTRAL POSITION SWITCH (ON LEFT SIDE OF TRANSMISSION) POWER DISTRIBUTION SYSTEM PPL RED WIRE RUN WIRE STARTER MOTOR STARTER RELAY (IN UNDERHOOD FUSE/RELAY CENTER) STARTER SOLENOID UNDERHOOD FUSE/RELAY CENTER (ON LEFT SIDE OF ENGINE COMPARTMENT) BATT IGN-A FUSE WHITE LABEL STUD YEL WIRE

ABS FUSE ABS IND. BATTERY SIGNAL GROUND BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) BRN WIRE COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DK GRN WIRE GAUGES FUSE 4 HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION ABS IND GROUND BRAKE SW INPUT INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL PPL 1807 680 PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SPEED SENSOR SENSOR HIGH SENSOR HIGH SENSOR LOW SENSOR LOW 873 833 TAN WIRE TAN/WHT WIRE TCC/BRAKE SWITCH (BEHIND DASH, ON BRAKE PEDAL SUPPORT) UNDERHOOD FUSE BLOCK UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON SIDE OF TRANSMISSION) VEHICLE SPEED SENSOR (VSS) MODULE (BELOW DASH, NEAR STEERING COLUMN) VSS VSS SIG VSS SIG DIAGNOSTIC SIG SERIAL DATA BRAKE IND INPUT EBCM GROUND W/ 6.5L W/O 6.5L WARNING SYSTEMS YEL WIRE YEL/BLK WIRE

ABS FUSE ABS PUMP ABS/TCC SW ANTI-LOCK IND BLK WIRE BODY FUSE BLOCK (BELOW 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 BRN WIRE CRUISE CONTROL SYSTEM DK GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START IGN E FUSE INSTRUMENT PANEL CLUSTER LEFT FRONT SENSOR (-) RIGHT FRONT SENSOR (+) BRAKE INPUT LEFT FRONT WHEEL SPEED SENSOR LOGIC LT BLU WIRE NCA WIRE OF TRANSMISSION) PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENG COMP, ON LEFT INNER FENDER) PPL PPL DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) RED/BLK WIRE RIGHT FRONT WHEEL SPEED SENSOR SERIAL DATA IGNITION STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) TAN WIRE TCC BRAKE SW UINDERHOOD FUSE BLOCK (ON LEFT SIDE 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

2 3 SERIAL DATA SERIAL DATA 5.3L 6.6L 4.8L, 5.3L, 6.0L 4.3L ACC WAKE UP SERIAL DATA 11 15 19 7 6 38 37 5985 2501 2500 2500 2501 2500 2501 ACC WAKE-UP SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER CHIME MODULE (BEHIND LEFT CENTER OF DASH) CONTROL EXCEPT 6.6L W/O ACTIVE BRAKE CONTROL COOLANT HEATER (6.6L) DATA BUS+ DATA BUS+ DATA BUS- DATA BUS- DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DATA LINK RESISTOR DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) ELECTRONIC CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 5.3L EXCEPT 6.6L W/ ACTIVE BRAKE FUEL PUMP FLOW CONTROL MODULE (5.3L) (AT REAR OF GLOW PLUG CONTROL MODULE (GPCM) (6.6L) HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER (IPC) LIGHT DUTY W/O RECREATIONAL VEHICLE, UPFITTER SALES PACKAGE LTR/DLC FUSE 38 RADIO RED WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (IF EQUIPPED) (BEHIND CENTER OF DASH) SERIAL DATA SPLICE PACK TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD PASS THROUGH GROMMET) VEHICLE, ATTACHED TO LEFT REAR FRAME RAIL) W/ AUXILIARY FUEL FIRED HEATER W/ RADIO PROVISIONS W/O AUXILIARY FUEL FIRED HEATER W/O RADIO PROVISIONS WHT WIRE

14 13 15 5 BRAKE LOW REF BRAKE SENS SIG 15 5 38 45 61 11 54 26 42 FUEL TEM SIG BRAKE APPLY SEN SIG LOW REF 43 44 28 27 SER DATA BUS(+) SER DATA BUS(-) 6.6L 53 57 40 59 32 16 3 65 35 63 5 6 ACCELERATOR PEDAL POSITION (APP) SENSOR (UNDER LEFT SIDE OF DASH) APP SEN 1 SIG LOW REF APP SEN 2 SIG LOW REF PPL AUTOMATIC TRANSMISSION (6 SPEED A/T) AUTOMATIC TRANSMISSION OUTPUT SHAFT SPEED (OSS) SENSOR AUTOMATIC TRANSMISSION OUTPUT SHAFT SPEED (OSS) SENSOR ASSEMBLY BATT + BCM 2 FUSE 58 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRAKE PEDAL POSITION (BPP) SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY CRUISE CONTROL IND DIMMING SIG CRUISE CONTROL SWITCH SIGNAL CRUISE IND CRUISE SWITCH DATA BUS - DATA BUS + VSS LOW SIG VSS HIGH SIG DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BATT FUSE 19 ENGINE CONTROL MODULE (ECM) GMLAN GROUND GRY WIRE HI SPD GMLAN SER DATA BUS- HOT AT ALL TIMES HOT W/ RUN/CRANK RELAY 15 ENERGIZED IGN INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (AT TOP OF STEERING COLUMN) INSTRUMENT PANEL CLUSTER (IPC) IPC FUSE 10 LEFT STEERING WHEEL CONTROL SWITCH LOGIC LT BLU WIRE LT GRN/BLK WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RED/WHT WIRE RES+ SET- TAN WIRE TAN/BLK WIRE THROTTLE BODY (EXCEPT 6.6L) TP SENS 1 SIG LOW REF TP SENS 2 SIG TAC MOTOR CTRL 2 TAC MOTOR CTRL 1 TRANS- MISSIONS SYSTEM TRANSMISSION CONTROL MODULE (4 SPEED A/T) TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE GER GRID GROUND HOT AT ALL TIMES BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) HOT AT ALL TIMES UNDERHOOD FUSE BLOCK MEGA FUSE (ON LEFT SIDE OF ENGINE COMPT) HVAC/ CNTRL FUSE LEFT REAR WINDOW DEFOGGER GRID LEFT REAR WINDOW DEFOG- GER GRID LOGIC IGN NCA WIRE ORG/ WIRE OSRVM HTR FUSE PPL PPL PPL REAR DEFOG RED WIRE RIGHT (BEHIND KICK PANEL) RIGHT REAR WINDOW DEFOG- RIGHT REAR WINDOW DEFOGGER GRID RR DEFOG RLY PWR REAR WINDOW DEFOGGER IND DEFOGGER SWITCH SPLICE BLOCK SPLICE BLOCK STATIONARY REAR DOOR WINDOW SWING OUT REAR DOOR WINDOW WHT WIRE

A/C HIGH PRESSURE SWITCH AUXILIARY AIR TEMPERATURE ACTUATOR AUXILIARY MODE ACTUATOR (LEFT REAR OF PASSENGER COMPT) BLK WIRE BLOW FUSE 51 BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BLOWER MOTOR RESISTOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BRN WIRE BRN/WHT WIRE DEFOGGER SYSTEM DK BLU WIRE DK GRN/WHT WIRE FRONT AUXILIARY HVAC CONTROL ASSEMBLY (IF EQUIPPED) GRY WIRE HOT AT ALL TIMES HOT IN HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 LOGIC LT BLU WIRE LT GRN WIRE MED OFF OFF MAX NORM BI-LEV ORG/ WIRE PPL R DEFOG IND GROUND ING 3 BATTERY RED WIRE RED/BLK (OR RED) WIRE RED/WHT WIRE RR BLOWER FUSE 13 RUN WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT HEAT/DEF DEF VENT HEAT HEAT/DEF DEF OFF MAX NORM BI-LEV WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C FUSE 32 A/C LOW PRESSURE SWITCH (ON SIDE OF ACCUMULATOR) A/C RELAY 54 AUXILIARY BLOWER MOTOR (IF EQUIPPED) AUXILIARY BLOWER MOTOR RESISTOR BLK WIRE BRN WIRE CLUTCH RLY CTRL DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE HARN, 32 CM FROM HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LOW PRESS SIG LT BLU WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT INNER FENDER) PROVISIONAL RED/WHT WIRE REQUEST SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

A/C HIGH PRESSURE SWITCH AUXILIARY HVAC CONTROL PROCESSOR (BEHIND AUXILIARY HVAC ASSEMBLY, IN HEADLINER) BLK WIRE BLOW FUSE 51 BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BLOWER MOTOR RESISTOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BREAKOUT) BREAKOUT) (W/O RV UPFITTER OPTION: IN FRONT HEADLINER HARN, BRN WIRE BRN/WHT WIRE DEFOGGER SYSTEM DK BLU WIRE DK GRN/WHT WIRE EXCEPT RV FRONT AUXILIARY HVAC CONTROL ASSEMBLY GRY WIRE HOT AT ALL TIMES HOT IN HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 LOGIC LT BLU WIRE LT GRN WIRE MED OFF OFF LO MED HI OFF MAX NORM BI-LEV ORG/ WIRE PNK/BLK WIRE PPL PPL/WHT WIRE R DEFOG IND GROUND ING 3 BATTERY REAR REAR AUXILIARY HVAC CONTROL ASSEMBLY RED WIRE RED/BLK (OR RED) WIRE RED/WHT WIRE RR BLOWER FUSE 13 RUN WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT HEAT/DEF DEF VENT HEAT HEAT/DEF DEF OFF MAX NORM BI-LEV WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C FUSE 32 A/C LOW PRESSURE SWITCH (ON SIDE OF ACCUMULATOR) A/C RELAY 54 AUXILIARY AIR TEMPERATURE ACTUATOR AUXILIARY BLOWER MOTOR (LEFT REAR OF PASSENGER AUXILIARY BLOWER MOTOR RESISTOR AUXILIARY MODE ACTUATOR (LEFT REAR OF PASSENGER COMPT) BLK WIRE BRN WIRE CLUTCH RLY CTRL COMPT, ON AUXILIARY HVAC ASSEMBLY) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HARN, 32 CM FROM HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LOW PRESS SIG LT BLU WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT INNER FENDER) PROVISIONAL RED/WHT WIRE REQUEST SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE